I need help to understand how to do these problems with while loops | Together C & C++ | Page 2

normal juniper Sep 21, 2023, 2:53 AM

#

a

#

boom

obtuse plover Sep 21, 2023, 2:53 AM

#

You ruined my day

sleek halo Sep 21, 2023, 2:53 AM

#

int ans = 196;
int attempts = 4;
int guess;
cout << " I am a three-digit number.My tens digit is five move than my ones digit,and my hundreds digit is eight less than my tens digit." << endl;
cout << "What number am I? ";
while(attempts != 0) {
cin >> guess;
cout <<"You've run out of attempts.Bye!"<< endl;
attempts -= 1;
if(guess== ans) {
cout <<" Well Done!";
}
if(attempt==0) {
cout << ans;
break;
}
}
return 0;
}```

#

so like this?

sleek halo Sep 21, 2023, 2:53 AM

#

normal juniper boom

damn

obtuse plover Sep 21, 2023, 2:54 AM

#

sleek halo ```cpp int ans = 196; int attempts = 4; int guess; cout << " I am a three-digit ...

If I guess correctly on first try, it will annoyingly continue to ask for input 3 more times

#

Check this out

sleek halo Sep 21, 2023, 2:55 AM

#

what is std:: cout << riddle

obtuse plover Sep 21, 2023, 2:55 AM

#

sleek halo ```cpp int ans = 196; int attempts = 4; int guess; cout << " I am a three-digit ...

And cin cannot pass to guess, because the input is a string, you need to convert it to int first

normal juniper Sep 21, 2023, 2:55 AM

#

riddle is a string variable

obtuse plover Sep 21, 2023, 2:55 AM

#

sleek halo what is std:: cout << riddle

I print the string riddle out

normal juniper Sep 21, 2023, 2:55 AM

#

so it essentially means "output the riddle variable"

sleek halo Sep 21, 2023, 2:55 AM

#

oh thats what std mean

obtuse plover Sep 21, 2023, 2:56 AM

#

Standard

#

Means, it's from the standard library of C++

sleek halo Sep 21, 2023, 2:56 AM

#

i see

#

also for guess i need to change the datatype

#

but its a number

soft rapids Sep 21, 2023, 2:56 AM

#

sleek halo ```cpp int ans = 196; int attempts = 4; int guess; cout << " I am a three-digit ...

Why did u take the break outside your if statement for if you get it correct?

sleek halo Sep 21, 2023, 2:56 AM

#

being guess

#

so why is int not okay

normal juniper Sep 21, 2023, 2:57 AM

#

sleek halo oh thats what std mean

no, cout means output

#

std is just a namespace, aka a sort of library/collection of functions and other stuff

obtuse plover Sep 21, 2023, 2:57 AM

#

Because what the user types in is a string, a string isn't an integer

#

You need to convert this string to an integer first

#

This can be done with std::stoi(str)

soft rapids Sep 21, 2023, 2:57 AM

#

No no

obtuse plover Sep 21, 2023, 2:57 AM

#

stoi = String To Integer

soft rapids Sep 21, 2023, 2:57 AM

#

There is no need to convert any string to a integer in this program

#

And that is way too advanced too

#

For their stage

sleek halo Sep 21, 2023, 2:58 AM

#

u can store a character in a number?

#

huh

obtuse plover Sep 21, 2023, 2:58 AM

#

So, instead, we'll just change to "std::string ans = "196""?

soft rapids Sep 21, 2023, 2:58 AM

#

This program just wants to check if the user input is equal to 196

#

Two numbers

#

That’s it

obtuse plover Sep 21, 2023, 2:59 AM

#

We actually are working with one string and one integer

soft rapids Sep 21, 2023, 2:59 AM

#

Where do u see string?

obtuse plover Sep 21, 2023, 2:59 AM

#

Is there implicit type conversion (int -> string) when we compare string and int?

sleek halo Sep 21, 2023, 2:59 AM

#

alright so i change the ans to a string instead of a int?

obtuse plover Sep 21, 2023, 2:59 AM

#

soft rapids Where do u see string?

std::cin doesn't give you an integer, right?

#

Or am I being dumb

sleek halo Sep 21, 2023, 2:59 AM

#

it gives numbers

soft rapids Sep 21, 2023, 2:59 AM

#

Cin doesn’t give u anything?

sleek halo Sep 21, 2023, 3:00 AM

#

the user is supose to give numbers

soft rapids Sep 21, 2023, 3:00 AM

#

It just returns false or true if the value read is valid

#

There’s no need of strings anywhere

#

We are just working with integers

obtuse plover Sep 21, 2023, 3:00 AM

#

What's the definition of 'valid' here?

#

I'm confused, please hang onto me for a second

soft rapids Sep 21, 2023, 3:01 AM

#

If the data type read from the cin stream is equal to the data type being changed

#

Such as

#

Int value;

cin >> “string”;

#

This is off topic though

#

Just look up what cin returns

#

Anyways what step are u on again?

sleek halo Sep 21, 2023, 3:03 AM

#

who me?

#

or the other person

#

uh i ma just assume u mean me

#

int ans = 196;
int attempts = 4;
int guess;
cout << " I am a three-digit number.My tens digit is five move than my ones digit,and my hundreds digit is eight less than my tens digit." << endl;
cout << "What number am I? ";
while(attempts != 0) {
cin >> guess;
cout <<"You've run out of attempts.Bye!"<< endl;
attempts -= 1;
if(guess== ans) {
cout <<" Well Done!";
break;
}
}
return 0;
}```

#

so apparently i have to fix the attempts thing

obtuse plover Sep 21, 2023, 3:04 AM

#

That's so cool, new knowledge

#

I never knew that

#

Thank you very much

sleek halo Sep 21, 2023, 3:06 AM

#

Screenshot_2023-09-20_at_11.06.14_PM.png

#

alright so at expected it still writes it

#

what if i keep it out of the loop?

normal juniper Sep 21, 2023, 3:07 AM

#

your code is going to produce the "run out of attempts" thing anyway

#

because you didn't add a condition around it

#

it's guaranteed to output it

sleek halo Sep 21, 2023, 3:07 AM

#

i assumed the while( attempts !=0)

#

was the condition for that

normal juniper Sep 21, 2023, 3:07 AM

#

@obtuse plover i'll get back to ur question later

sleek halo Sep 21, 2023, 3:08 AM

#

oh wait

#

the attempts thing is after the cout statement

normal juniper Sep 21, 2023, 3:08 AM

#

sleek halo was the condition for that

after doing cin >> guess, the next line will output the "run out of attempts" message anyway

sleek halo Sep 21, 2023, 3:08 AM

#

does that make a difference

normal juniper Sep 21, 2023, 3:08 AM

#

so while( attempts !=0) is largely irrelevant

normal juniper Sep 21, 2023, 3:08 AM

#

sleek halo does that make a difference

yeah

sleek halo Sep 21, 2023, 3:09 AM

#

so i should put the attempts- before the cout statement

normal juniper Sep 21, 2023, 3:09 AM

#

you're basically saying, "please input your answer", then before checking if the answer is correct, you're outputting the message that they've ran out of attempts

sleek halo Sep 21, 2023, 3:10 AM

#

ohh

normal juniper Sep 21, 2023, 3:10 AM

#

you don't need 2 while loops

#

that just complexifies the branching logic unnecessarily

#

even if it's just for a validation sanitisation

obtuse plover Sep 21, 2023, 3:12 AM

#

How will you simplify it?

sleek halo Sep 21, 2023, 3:12 AM

#

i might have to do that attempts thing with a if statement then 🤔

#

or i could modify the condition in the while?

#

maybe add something

#

liek a ||

normal juniper Sep 21, 2023, 3:12 AM

#

also if (attempts <= 0) should be if (attempts == 0) instead

#

it'll never reach under 0

#

plus it's simpler to understand the condition

sleek halo Sep 21, 2023, 3:13 AM

#

oh alright

#

int ans = 196;
int attempts = 4;
int guess;
cout << " I am a three-digit number.My tens digit is five move than my ones digit,and my hundreds digit is eight less than my tens digit." << endl;
cout << "What number am I? ";
while(attempts == 0) {
cin >> guess;
cout <<"You've run out of attempts.Bye!"<< endl;
attempts -= 1;
if(guess== ans) {
cout <<" Well Done!";
break;
}
}
return 0;```
}

normal juniper Sep 21, 2023, 3:14 AM

#

obtuse plover How will you simplify it?

for the sanitisation, i'd do:

std::cin >> guess;

if (guess = "") {
  std::cout << "invalid input, try again";
  return 1;
}

#

it's much more intuitive than while (!cin >> guess)

sleek halo Sep 21, 2023, 3:15 AM

#

normal juniper also `if (attempts <= 0)` should be `if (attempts == 0)` instead

wait i had !=

#

why would ==

#

be better

obtuse plover Sep 21, 2023, 3:15 AM

#

normal juniper for the sanitisation, i'd do: ```cpp std::cin >> guess; if (guess = "") { std...

I learnt a lot from this alone, thanks

#

I never knew I can return 0 or 1 inside a while loop to either force it to close or to work like a "continue" in C#

#

That's so great to know

sleek halo Sep 21, 2023, 3:16 AM

#

nice we're all learning ^_^

#

oh right

#

so uh why would != not be good

normal juniper Sep 21, 2023, 3:18 AM

#

yknow what wait i'll remake @obtuse plover's code

sleek halo Sep 21, 2023, 3:19 AM

#

ye

obtuse plover Sep 21, 2023, 3:19 AM

#

kernel, just to verify, when you return 1, it skips to the next loop without checking the conditions?

normal juniper Sep 21, 2023, 3:21 AM

#

#include <iostream>

int main()
{
  const int ans = 196;
  int attempts = 4;
  bool win = false;
  std::string riddle = " I am a three-digit number.My tens digit is five move than my ones digit,and my hundreds digit is eight less than my tens digit. \n What am I? \n";
  std::cout << riddle;
  do
  {
    int guess;
    std::cout << "What's your guess?\n";
    
    cin >> guess;

    if (guess == "") 
    {
      std::cout << "Invalid input. Try again!\n";
    }

    if (guess == ans)
    {
      win = true;
      std::cout << "You won! Congrats!";
      return 0;
    }
    else
    {
      attempts -= 1;
    }
  } while ((win == false) && (attempts > 0));

  std::cout << "you've ran out of attempts, try again next time";
  return 0;
}

#

it should be something like this

obtuse plover Sep 21, 2023, 3:21 AM

#

You missed the Run out of attempts message

normal juniper Sep 21, 2023, 3:21 AM

#

also i didn't take into account the string input validation between with the int but i left that out for the purpose of explanation

normal juniper Sep 21, 2023, 3:22 AM

#

obtuse plover You missed the Run out of attempts message

no it's at the end of the code

obtuse plover Sep 21, 2023, 3:22 AM

#

I'll get that message even if I win?

normal juniper Sep 21, 2023, 3:22 AM

#

you won't

sleek halo Sep 21, 2023, 3:22 AM

#

alright so bool works like a if statement right?

normal juniper Sep 21, 2023, 3:22 AM

#

actually wait

sleek halo Sep 21, 2023, 3:22 AM

#

expect u can just write false or true

#

instead of equations

#

to make it mean true or false

normal juniper Sep 21, 2023, 3:23 AM

#

#include <iostream>

int main()
{
  const int ans = 196;
  int attempts = 4;
  bool win = false;
  std::string riddle = " I am a three-digit number.My tens digit is five move than my ones digit,and my hundreds digit is eight less than my tens digit. \n What am I? \n";
  std::cout << riddle;
  do
  {
    int guess;
    std::cout << "What's your guess?\n";
    
    cin >> guess;

    if (guess == "") 
    {
      std::cout << "Invalid input. Try again!\n";
      continue;
    }

    if (guess == ans)
    {
      std::cout << "You won! Congrats!";
      return 0;
    }
    else
    {
      attempts -= 1;
    }
  } while (attempts > 0);

  std::cout << "you've ran out of attempts, try again next time";
  return 0;
}

#

there

#

even better

#

this should be good now

obtuse plover Sep 21, 2023, 3:23 AM

#

sleek halo alright so bool works like a if statement right?

Actually, for example (3 > 2) returns True, so if works with True not with (3 > 2) itself (what I think)

sleek halo Sep 21, 2023, 3:24 AM

#

oh alright

obtuse plover Sep 21, 2023, 3:24 AM

#

normal juniper ```cpp #include <iostream> int main() { const int ans = 196; int attempts =...

Threw an error

normal juniper Sep 21, 2023, 3:24 AM

#

sleek halo to make it mean true or false

you can write expressions and true or false

normal juniper Sep 21, 2023, 3:24 AM

#

obtuse plover Threw an error

what part

obtuse plover Sep 21, 2023, 3:24 AM

#

/tmp/sqvGJ78dxG.cpp:17:15: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
17 | if (guess == "")
| ~~^

normal juniper Sep 21, 2023, 3:24 AM

#

the std::cin >> guess part?

#

oh yeah

sleek halo Sep 21, 2023, 3:25 AM

#

hmm instresting the while statment is completly at the end

normal juniper Sep 21, 2023, 3:25 AM

#

normal juniper also i didn't take into account the string input validation between with the int...

i said it wouldn't work

#

¯_(ツ)_/¯

sleek halo Sep 21, 2023, 3:25 AM

#

i thought that needed to be set for so the code knows what number it can go to

obtuse plover Sep 21, 2023, 3:26 AM

#

It's a do-while loop

#

You use it when you want to ensure the content inside the loop always runs at least once

#

It runs through the codes, then check if the condition is true, then it'll repeat the loop, else it continues with next lines

sleek halo Sep 21, 2023, 3:27 AM

#

ah okay

#

can it be done with just a while loop first

#

or because if i use a while loop first, it causes more issues?

normal juniper Sep 21, 2023, 3:30 AM

#

it can be done with a while loop or a do while loop

#

either is fine

#

personally i'd pick a do while loop for this situation

sleek halo Sep 21, 2023, 3:31 AM

#

alright i'll put the if statements first

obtuse plover Sep 21, 2023, 3:32 AM

#

BTW, return 0 and return 1 didn't work how I expected it to

#

It returns 0 and 1 to main(), not the loop, like my speculation

sleek halo Sep 21, 2023, 3:33 AM

#

wait but if i wanted to do with the while loop, how would it have to go

normal juniper Sep 21, 2023, 3:33 AM

#

obtuse plover It returns 0 and 1 to main(), not the loop, like my speculation

yeah because it can directly return to stdout

#

it doesn't need to reach the loop

#

it's more of a shortcut in the logic branch

#

so it can directly quit the program

#

@sleek halo fyi, the code i showed doesn't work on purpose

#

it was a demonstration of the logical path

#

that it should take

sleek halo Sep 21, 2023, 3:36 AM

#

so the logical path being starting with if statements first

normal juniper Sep 21, 2023, 3:36 AM

#

sleek halo so the logical path being starting with if statements first

which if statement

#

there's 2 in the code

sleek halo Sep 21, 2023, 3:37 AM

#

no im saying u started with if statements

#

and i started with while

normal juniper Sep 21, 2023, 3:37 AM

#

ok

sleek halo Sep 21, 2023, 3:37 AM

#

ur saying it was more logical to do if statements first?

normal juniper Sep 21, 2023, 3:37 AM

#

in my opinion yes

sleek halo Sep 21, 2023, 3:38 AM

#

but i'm pretty sure my prof wants me to do it with a while

#

well is say "A "while loop is required

#

so as long as one is there

#

its probably fine im assuming

#

u know what i'm a beginner anyway, i should do what's simplier

normal juniper Sep 21, 2023, 3:39 AM

#

i mean, it's already simple enough

#

i can't make it any more simple

normal juniper Sep 21, 2023, 3:39 AM

#

normal juniper ```cpp #include <iostream> int main() { const int ans = 196; int attempts =...

if you don't understand something about the code, tell me

sleek halo Sep 21, 2023, 3:40 AM

#

alright i don't know how bool works

#

never used it, my prof only did stuff with if statements so far

normal juniper Sep 21, 2023, 3:40 AM

#

do you know what a type is in c++

sleek halo Sep 21, 2023, 3:40 AM

#

yeah stuff like bool

normal juniper Sep 21, 2023, 3:40 AM

#

mhm

sleek halo Sep 21, 2023, 3:41 AM

#

char

#

int

#

double

#

there's also float but i think its less accurate than double

#

but double is used more

normal juniper Sep 21, 2023, 3:42 AM

#

a bool is essentially just a true of false statement. you can do stuff like:

bool test = (1 + 10 == 11);

bool test2 = false;

#

expressions like ```cpp
if (10 == 10)

#

it's just a logical expression that's either true or false

#

you can also use in this way:

bool test = (10 == 10);
if (test) {
  std::cout << "expression is true";
} else {
  std::cout << "expression if false";
}```

#

hopefully that clears things up

#

and if statement can only take true or false

#

nothing else

sleek halo Sep 21, 2023, 3:45 AM

#

and bool can do more than that

normal juniper Sep 21, 2023, 3:45 AM

#

wdym

sleek halo Sep 21, 2023, 3:46 AM

#

so u said if statemenrs can only take true or false

normal juniper Sep 21, 2023, 3:46 AM

#

yeah pretty much

#

you can't do ```cpp
if ("something")

#

it MUST be a true or false statement

#

nothing more, nothing less

#

well technically this isn't true but for the sake of learning, think of it that way

sleek halo Sep 21, 2023, 3:47 AM

#

Yeah alright

#

And bool can do more than that?

normal juniper Sep 21, 2023, 3:47 AM

#

no

#

a bool is just true or false

sleek halo Sep 21, 2023, 3:48 AM

#

bruh this internet

normal juniper Sep 21, 2023, 3:48 AM

#

it can't do much

sleek halo Sep 21, 2023, 3:48 AM

#

Oh alright

#

So u can do bool something

#

And later say if it’s true or false

#

Alright

normal juniper Sep 21, 2023, 3:49 AM

#

can you give me an example of what you mean

sleek halo Sep 21, 2023, 3:49 AM

#

Like bool test

#

And later

#

Make that false

#

Bool test = false

normal juniper Sep 21, 2023, 3:49 AM

#

yep

sleek halo Sep 21, 2023, 3:50 AM

#

Alright

#

Lemme write the code

normal juniper Sep 21, 2023, 3:50 AM

#

ping me when ur done

sleek halo Sep 21, 2023, 3:50 AM

#

Ye

obtuse plover Sep 21, 2023, 3:54 AM

#

#include <iostream>
#include <string>

bool isPosNumber(std::string str)
{
    for (int i =0; i < str.length(); i++)
    {
        if (!(isdigit(str[i]))) { return false; }
    }
    return true;
}
int main()
{
  const int ans = 196;
  int attempts = 4;
  bool win = false;
  std::string riddle = " I am a three-digit number.My tens digit is five move than my ones digit,and my hundreds digit is eight less than my tens digit. \n What am I? \n";
  std::cout << riddle;
  do
  {
    int guess;
    do 
    {
        std::cout << "What's your guess?\n";
        std::string _strGuess = "";
        std::cin >> _strGuess;
        if (isPosNumber(_strGuess))
        {
            guess = std::stoi(_strGuess);
            break;
        } else
        {
            std::cout << "Invalid Input!\n";
        }
    } while (true);
    if (guess == ans)
    {
      win = true;
      std::cout << "You won! Congrats!";
    }
    else
    {
      attempts -= 1;
      std::cout << "That's not right. Try again. \n";
      if (attempts <= 0)
      {
        std::cout << "Sorry, you ran out of attempts.\n";
      }
    }
  } while ((win == false) && (attempts > 0));
}```

#

I finally found a version that works

sleek halo Sep 21, 2023, 3:55 AM

#

normal juniper ```cpp #include <iostream> int main() { const int ans = 196; int attempts =...

wait i'm confused where bool is being used? u declare win as false here? but where is it being used in the rest of the program??🤔

#

oh right

#

@normal juniper

#

if (guess == "")```

#

also this part i dont get

#

its supose to be wrong but u just put qutoes

#

i'm gonna continue working on this tomorrow

#

for now i gotta go

soft rapids Sep 21, 2023, 5:51 AM

#

normal juniper it's much more intuitive than `while (!cin >> guess)`

Why’s that? Is it because there’s also an error msg?

#

And also how does
if (guess = “”) work? Isn’t that nothing in the quotations?

soft rapids Sep 21, 2023, 6:10 AM

#

sleek halo i'm gonna continue working on this tomorrow

This is the polished version of your code that u wrote earlier btw

int ans = 196;
int attempts = 4;
int guess;
cout << "I am a three-digit number. My tens digit is five more than my ones digit,and my hundreds digit is eight less than my tens digit." << endl;
cout << "What number am I? ";
// Loop until we run out of attempts
while(attempts != 0) {
  cin >> guess;
  attempts -= 1;
  // If guess is the answer, congratulate and break out of the loop
  if(guess == ans) {
    cout <<"Well Done!";
    break;
  }
  // If attempts is zero, print that you ran out of attempts
  // then the while loop will exit itself right afterwards because of the condition
  else if (attempts == 0) 
    cout <<"You've run out of attempts.Bye!"<< endl;
  // When the guess is wrong and there are still attempts left, then this else will run
  else
    cout << "Wrong answer, try again: ";
}
return 0;
}```

#

And here's version 2 for learning purpose of learning "continue" because it's the counterpart to "break" and people usually learn it together:

int ans = 196;
int attempts = 4;
int guess;
cout << " I am a three-digit number.My tens digit is five move than my ones digit,and my hundreds digit is eight less than my tens digit." << endl;
cout << "What number am I? ";
// Loop until we run out of attempts
while(attempts != 0) {
  cin >> guess;
  attempts -= 1;
  // If guess is the answer, congratulate and break out of the loop
  if(guess == ans) {
    cout <<"Well Done!";
    break;
  }
  // If attempts is zero, print that you ran out of attempts
  // then the while loop will exit itself right afterwards because of the condition
  if (attempts == 0) {
    cout <<"You've run out of attempts.Bye!"<< endl;
    // continue is similar to break where you use it inside of a loop
    // and it makes the program jump back up to the loop immediately 
    // so that no code below the continue will run
    continue;
  }
  // This will print "wrong answer" every time when the two above if statements weren't executed
  // because both above if statements will either break out of the loop or jump back up to the        loop, so this code won't be reached unless both are false (AKA - isn't the right answer and      isn't out of attempts)
  // so, no need for an "else" 
  cout << "Wrong answer, try again: ";
}
return 0;
}```

#

Both of these versions work btw, i tested it. U can delete all the comments out if u want

normal juniper Sep 21, 2023, 9:36 AM

#

sleek halo wait i'm confused where bool is being used? u declare win as false here? but whe...

sorry, the win variable isn’t necessary in my code

normal juniper Sep 21, 2023, 9:37 AM

#

sleek halo its supose to be wrong but u just put qutoes

that’s supposed to be an input validator, it checks if the user input something and didn’t just press enter without anything typed

normal juniper Sep 21, 2023, 9:38 AM

#

soft rapids And also how does if (guess = “”) work? Isn’t that nothing in the quotations?

yes, the logic is "if the user inputs nothing, throw an error"

normal juniper Sep 21, 2023, 3:50 PM

#

it's arguably not required though

soft rapids Sep 21, 2023, 3:51 PM

#

How can the user enter nothing tho, wouldn’t it just be a \n

normal juniper Sep 21, 2023, 3:57 PM

#

soft rapids How can the user enter nothing tho, wouldn’t it just be a \n

it's not a \n, if they input nothing then it's treated as byte 0x00

soft rapids Sep 21, 2023, 3:58 PM

#

So they just press enter and the \n gets ignored?

normal juniper Sep 21, 2023, 3:58 PM

#

\n has nothing to do with it

#

the guess variable will be a null byte

soft rapids Sep 21, 2023, 3:59 PM

#

Im just saying the \n since u have to press enter to use cin

#

But since it’s an integer then it’s just nothing in there 0x00

#

Is that what u mean?

normal juniper Sep 21, 2023, 4:00 PM

#

this is how i'd do it

normal juniper Sep 21, 2023, 4:00 PM

#

soft rapids But since it’s an integer then it’s just nothing in there 0x00

pretty much

#

unless i'm misunderstanding something

soft rapids Sep 21, 2023, 4:01 PM

#

Does that even work tho? I feel like I remember if I press enter without typing anything, then the program doesn’t do anything it just waits until I actually enter something

normal juniper Sep 21, 2023, 4:01 PM

#

soft rapids Does that even work tho? I feel like I remember if I press enter without typing ...

it does

soft rapids Sep 21, 2023, 4:01 PM

#

Oh

normal juniper Sep 21, 2023, 4:01 PM

#

if nothing is inputed, the literal string for guess is just empty

#

and the whitespace is treated as null

soft rapids Sep 21, 2023, 4:02 PM

#

And if it’s an integer then it won’t do anything until I enter something?

normal juniper Sep 21, 2023, 4:02 PM

#

the sanitiation condition simply checks if it's empty

soft rapids Sep 21, 2023, 4:02 PM

#

Yeah

normal juniper Sep 21, 2023, 4:02 PM

#

soft rapids And if it’s an integer then it won’t do anything until I enter something?

wdym exactly

soft rapids Sep 21, 2023, 4:03 PM

#

I swear I could’ve remembered that if I have a cin >>
And then I just press enter, it doesn’t do anything until I actually type something else and then enter

normal juniper Sep 21, 2023, 4:03 PM

#

that's not how cin works

soft rapids Sep 21, 2023, 4:03 PM

#

I guess I remember it wrong

normal juniper Sep 21, 2023, 4:06 PM

#

soft rapids I guess I remember it wrong

ok nvm you're right

#

i just tested it

soft rapids Sep 21, 2023, 4:06 PM

#

Oh

normal juniper Sep 21, 2023, 4:07 PM

#

sadge

#

turns out i forgot how cin works

soft rapids Sep 21, 2023, 4:07 PM

#

Where’d u get that info then? About the null

#

Oh okay lol

#

I guess it’s understandable since ur proficient and I’m still a beginner so i remember still lol

normal juniper Sep 21, 2023, 4:07 PM

#

it's mostly an input validation technique i got from non-cin io stuff

#

i thought it would work the same way

#

but apparently not

soft rapids Sep 21, 2023, 4:08 PM

#

Ohh I see

#

Makes sense

normal juniper Sep 21, 2023, 4:08 PM

#

i'll edit the code btb

#

brb

#

#include <iostream>
#include <string>

using namespace std;

int main()
{
  const int ans = 196;
  int attempts = 4;
  bool win = false;
  std::string riddle = " I am a three-digit number.My tens digit is five move than my ones digit,and my hundreds digit is eight less than my tens digit. \n What am I? \n";
  std::cout << riddle;
  do
  {
    std::string guess = "";
    std::cout << "What's your guess?\n";
    
    std::cin >> guess;

    if (guess == std::to_string(ans))
    {
      std::cout << "You won! Congrats!\n";
      return 0;
    }
    else
    {
      std::cout << "Wrong answer, try again\n";
      attempts -= 1;
    }
  } while (attempts > 0);

  std::cout << "you've ran out of attempts, try again next time\n";
  return 0;
}

#

there

#

@sleek halo sry for another ping but this is how i'd do it fr this time

soft rapids Sep 21, 2023, 4:10 PM

#

It’s really interesting how u do a return 0 inside the loop, never seen that before but then again I’ve never seen professional work

normal juniper Sep 21, 2023, 4:10 PM

#

i'm nowhere near professional

soft rapids Sep 21, 2023, 4:10 PM

#

Well.. I mean like code for an actual job or project

#

Instead of basic shit

normal juniper Sep 21, 2023, 4:11 PM

#

loops are pretty much irrelevant to return, since it's directly responsible for returning a function's value

#

it has no effect to loops other than immediately breaking it and discarding the rest of the code within the function

normal juniper Sep 21, 2023, 4:12 PM

#

soft rapids Well.. I mean like code for an actual job or project

ooh

soft rapids Sep 21, 2023, 4:12 PM

#

I see

normal juniper Sep 21, 2023, 4:15 PM

#

soft rapids I see

it's sorta like instead of using a knife to cut open a watermelon and have clean slices in a procedural and repetitive cutting motion, you'd bring out a shotgun and blow the watermelon to pieces

#

that's how return is used in the code i showed

soft rapids Sep 21, 2023, 4:16 PM

#

LMAO

normal juniper Sep 21, 2023, 4:16 PM

#

it's probably a shit analogy but both methods work, it's just a difference of how direct it is at solving a problem

soft rapids Sep 21, 2023, 4:16 PM

#

That’s a good comparison LOL

#

So do u see that method often in professional code?

#

Or it just depends

normal juniper Sep 21, 2023, 4:17 PM

#

i'd say it's more on the professional end

#

cuz it minimises the branching and logical paths it has to take when the answer is already known

soft rapids Sep 21, 2023, 4:17 PM

#

Yeah that makes sense

#

And it’s just unnecessary to get to the last main’s return ig

normal juniper Sep 21, 2023, 4:18 PM

#

yep

#

that's exactly it

soft rapids Sep 21, 2023, 4:19 PM

#

How are you 19 and already a systems programmer

normal juniper Sep 21, 2023, 4:19 PM

#

soft rapids How are you 19 and already a systems programmer

i traded my irl social skills for programming skills

#

todayiwill

soft rapids Sep 21, 2023, 4:19 PM

#

Im 20 going on 21 this year and I barely know shit… mostly because I need to work harder lol

soft rapids Sep 21, 2023, 4:19 PM

#

normal juniper i traded my irl social skills for programming skills

Easiest trade tho

#

I just supplement with my animal skills lol

normal juniper Sep 21, 2023, 4:20 PM

#

it's not something i necessarily brag about

#

it just shows i have no social life and spent half my life sticking my face on a computer

soft rapids Sep 21, 2023, 4:20 PM

#

Your work ethic is something I envy though so be happy lol

normal juniper Sep 21, 2023, 4:20 PM

#

soft rapids I just supplement with my animal skills lol

that's still super nice

soft rapids Sep 21, 2023, 4:21 PM

#

Def

normal juniper Sep 21, 2023, 4:21 PM

#

soft rapids Your work ethic is something I envy though so be happy lol

ty

#

mpfpthumbsup

soft rapids Sep 21, 2023, 4:21 PM

#

What drives you though? Do you just love the work that much or, you have a goal in mind like I do

normal juniper Sep 21, 2023, 4:22 PM

#

soft rapids What drives you though? Do you just love the work that much or, you have a goal ...

i only treat it like a hobby, programming is fun

#

i also figured it would open up a new field for me, so i put all my effort into learning how to code

#

and start making stuff i was intrigued about

soft rapids Sep 21, 2023, 4:24 PM

#

normal juniper i only treat it like a hobby, programming is fun

Niceee

soft rapids Sep 21, 2023, 4:24 PM

#

normal juniper and start making stuff i was intrigued about

Like what for example?

normal juniper Sep 21, 2023, 4:25 PM

#

soft rapids Like what for example?

CPU stuff, hardware tinkering, and some random shit like a password generator when i first started

#

i have a few failed projects tho

#

but it doesn't matter cuz i learned tons of new stuff anyway

soft rapids Sep 21, 2023, 4:26 PM

#

Very true ^p

#

So are u able to get a programming job without a degree?

normal juniper Sep 21, 2023, 4:27 PM

#

i'm confident i can get one even without a degree

soft rapids Sep 21, 2023, 4:27 PM

#

Definitely

normal juniper Sep 21, 2023, 4:27 PM

#

a lot of programming jobs allow employees without a degree anyway

#

even apple does it

#

it's mostly about individual ability rather than what you did at university for 3 years

#

that's why i never took a CS degree

soft rapids Sep 21, 2023, 4:28 PM

#

normal juniper it's mostly about individual ability rather than what you did at university for ...

Exactly what I was thinking

#

And why I didn’t go for a degree either.. mostly because it’s so fucking expensive for so much time and unwanted classes

normal juniper Sep 21, 2023, 4:28 PM

#

lol yeah

soft rapids Sep 21, 2023, 4:29 PM

#

Though every time I look at jobs, just to see what’s out there, they all require a degree. I’m thinking I’m not looking in the right place. Where do u look? Linkedin?

normal juniper Sep 21, 2023, 4:29 PM

#

i don't have a job

#

teehee

soft rapids Sep 21, 2023, 4:29 PM

#

Ik but u know where to look don’t u?

normal juniper Sep 21, 2023, 4:30 PM

#

not rly icl

soft rapids Sep 21, 2023, 4:30 PM

#

Oh nvm then

normal juniper Sep 21, 2023, 4:30 PM

#

Idkmane

soft rapids Sep 21, 2023, 4:30 PM

#

normal juniper even apple does it

I didn’t know this tho lol

normal juniper Sep 21, 2023, 4:31 PM

#

a certificate is mostly what would be recommended though

#

especially in cybersec jobs

#

like cybersecurity in uni is absolute dogshit, it's even worse than how CS is taught

soft rapids Sep 21, 2023, 4:31 PM

#

I actually just finished a certificate this month for C/C++ programming by UCSD - extended studies

#

I feel like I didn’t learn nearly enough as I should’ve tho

normal juniper Sep 21, 2023, 4:32 PM

#

soft rapids I actually just finished a certificate this month for C/C++ programming by UCSD ...

whoa

#

congrats

soft rapids Sep 21, 2023, 4:32 PM

#

It was nothing literally

#

I need to work harder lol

normal juniper Sep 21, 2023, 4:32 PM

#

oh

soft rapids Sep 21, 2023, 4:32 PM

#

I mean it wasn’t nothing, it was definitely hard

#

But I just don’t have enough knowledge as I should

soft rapids Sep 21, 2023, 4:32 PM

#

normal juniper like cybersecurity in uni is absolute dogshit, it's even worse than how CS is ta...

That sucks

normal juniper Sep 21, 2023, 4:32 PM

#

it's all input at the end

soft rapids Sep 21, 2023, 4:33 PM

#

LOL I like that ^

#

It’s true

normal juniper Sep 21, 2023, 4:33 PM

#

soft rapids That sucks

you'd learn cybersecurity 100x more efficiently if you learned it yourself at your own pace

#

it's depressing

soft rapids Sep 21, 2023, 4:34 PM

#

Hm, uni really seems like a scam nowadays

normal juniper Sep 21, 2023, 4:34 PM

#

i like how this thread just ended up as a casual convo lol

soft rapids Sep 21, 2023, 4:34 PM

#

And it’s interesting to know that it’s no different where you live as well

#

As it is in the US ^

soft rapids Sep 21, 2023, 4:34 PM

#

normal juniper i like how this thread just ended up as a casual convo lol

Yeah I was thinking the same LOL

normal juniper Sep 21, 2023, 4:34 PM

#

soft rapids Hm, uni really seems like a scam nowadays

maybe yeah for CS

#

but other than that, there's loads of value

soft rapids Sep 21, 2023, 4:35 PM

#

Oh

#

You’re doing a degree for geopolitics now right

normal juniper Sep 21, 2023, 4:35 PM

#

yeah

soft rapids Sep 21, 2023, 4:35 PM

#

What for?

normal juniper Sep 21, 2023, 4:35 PM

#

cuz i wanna work at NATO or the UN

#

clueless

soft rapids Sep 21, 2023, 4:35 PM

#

LOL

normal juniper Sep 21, 2023, 4:36 PM

#

it has fuckall to do with programming

soft rapids Sep 21, 2023, 4:36 PM

#

I like where your ambition LOL

#

Oh really

normal juniper Sep 21, 2023, 4:36 PM

#

ty

soft rapids Sep 21, 2023, 4:36 PM

#

So what kind of work would u want to do for them?

normal juniper Sep 21, 2023, 4:36 PM

#

not sure yet

#

i haven't even started any classes yet

soft rapids Sep 21, 2023, 4:36 PM

#

Yeah

#

That’s really cool though

#

Interesting combination

normal juniper Sep 21, 2023, 4:37 PM

#

https://tenor.com/view/so-good-wink-smile-oh-yeah-its-true-gif-24163876

Tenor

soft rapids Sep 21, 2023, 4:37 PM

#

Hopefully u won’t have issues learning… whatever it is you learn in geopolitics

#

Good luck with that lol

normal juniper Sep 21, 2023, 4:37 PM

#

thanks lol

soft rapids Sep 21, 2023, 4:58 PM

#

normal juniper thanks lol

Oh yeah, and why c++?

normal juniper Sep 21, 2023, 5:24 PM

#

soft rapids Oh yeah, and why c++?

i’m a masochist

sleek halo Sep 21, 2023, 11:03 PM

#

soft rapids This is the polished version of your code that u wrote earlier btw ```cpp int an...

Alright I chnaged my one to it

#

#include <iostream>
using namespace std;
int main () {

        int ans = 196;
        int attempts = 4;
        int guess;
        cout << " I am a three-digit number.My tens digit is five move than my ones digit,and my hundreds digit is eight less than my tens digit." << endl;
        cout << "What number am I? ";

        while(attempts != 0) {
        cin >> guess;
        attempts -= 1;

        if(guess == ans) {
        cout << "Well Done!";
        break;
        }
        else if(attempts == 0)
        cout <<"You've run out of attempts.Bye!"<< endl;

        else
        cout <<"Wrong answer, try again: ";
}
return 0;
}
~    ```

#

it seems so obvious when someone else writes out some of the code that thats how the problem should be solved

#

but still its bad that I couldn't get to this point on my own

#

I know I've only been learning coding for 4 weeks now, but I'm definetly screwed for my upcoming Exam if I'm like this man 🥲

#

so anyway it runs and stuff

#

So now I just need help with my 3rd question

#

#

so 4 digit number so I probably have to set a while to 10,000 at max im assuming

#

I'm not too sure if i should do a if statement

#

this is what i have so far

soft rapids Sep 21, 2023, 11:36 PM

#

sleek halo it seems so obvious when someone else writes out some of the code that thats how...

Haha u know, it’s okay because that’s exactly how programmers will feel especially someone as new as you, that’s why we sent all of it complete because we know how it goes

sleek halo Sep 21, 2023, 11:37 PM

#

#include <iostream>
using namespace std;
int main () {


        int x = 1000;

        cout << "I am a four-digit number.My first digit is one-third of my last digit,and the sum of my first two digits is equal to my thrid digit.What number am I?";

        while(x < 10000) {
        x = x + 1
        if(x%10

sleek halo Sep 21, 2023, 11:38 PM

#

soft rapids Haha u know, it’s okay because that’s exactly how programmers will feel especial...

yeah thanks for that

#

even if i'm not understanding, at least the hw is done at least i supose but yeah i'm trying my best to understand

#

so currently I need to make the if statements work

soft rapids Sep 21, 2023, 11:41 PM

#

Whelp looks like ur gonna have to do some math for this one I think

sleek halo Sep 21, 2023, 11:41 PM

#

yup

soft rapids Sep 21, 2023, 11:41 PM

#

sleek halo so 4 digit number so I probably have to set a while to 10,000 at max im assuming

Yeah prob

#

I’ll get back to u in a bit gotta afk

sleek halo Sep 21, 2023, 11:42 PM

#

so far i have the max number it should stop at 9999 and hopefully print all those numbers in between after then math

#

yeah sure

lean spindleBOT Sep 21, 2023, 11:47 PM

#

@sleek halo Has your question been resolved? If so, run !solved :)

sleek halo Sep 21, 2023, 11:54 PM

#

okay so this is what i have so far

#

#include <iostream>
using namespace std;
int main () {


        int x = 1000;

        cout << "I am a four-digit number.My first digit is one-third of my last digit,and the sum of my first two digits is equal to my thrid digit.What number am I?";

        while(x < 10000) {
        x = x + 1
        if(x%10 == 3 * x%10000 && x%10000 + x%1000 == x%10) {
        cout <<"x";```

#

when your back, lemme know what you think?

soft rapids Sep 22, 2023, 12:36 AM

#

sleek halo ```cpp #include <iostream> using namespace std; int main () { int x = ...

Awesome, you already got the entire loop logic made. That’s huge progress since yesterday

#

Don’t forget the space after the x though in the cout

#

Uh for the math idk how to do I’d have to think on it

#

But yeah it’s probably something like what you did with the % and getting digit’s places

soft rapids Sep 22, 2023, 1:02 AM

#

@sleek halo u there?

sleek halo Sep 22, 2023, 1:12 AM

#

Yeah sorry I was really tired today so I fell asleep just a moment ago but I’m up now

sleek halo Sep 22, 2023, 1:12 AM

#

soft rapids Awesome, you already got the entire loop logic made. That’s huge progress since ...

That’s good to hear then

soft rapids Sep 22, 2023, 1:15 AM

#

Oh rip

#

When is this due

sleek halo Sep 22, 2023, 1:15 AM

#

On Monday night

#

After I finish this though, I gotta study for the quiz for this since I have that on Tuesday for it

soft rapids Sep 22, 2023, 1:17 AM

#

Also I saw a lot of these numbers have the same difference of 110, so if u can’t figure out the equation maybe u could use that instead

soft rapids Sep 22, 2023, 1:17 AM

#

sleek halo After I finish this though, I gotta study for the quiz for this since I have tha...

Oh damn what’s the quiz about

sleek halo Sep 22, 2023, 1:17 AM

#

It’s all the way from the beginning to while loops

#

And then the exam is a week after that

#

Whihc yeah problems like these and that one is up to four loops or maybe the nested loops of she does a lesson on that next class

soft rapids Sep 22, 2023, 1:18 AM

#

Wtf an exam already

#

That sucks

sleek halo Sep 22, 2023, 1:20 AM

#

Yeah everything is going to fast

sleek halo Sep 22, 2023, 1:22 AM

#

soft rapids Also I saw a lot of these numbers have the same difference of 110, so if u can’...

Wdym

#

The modules?

soft rapids Sep 22, 2023, 1:25 AM

#

The numbers in the sample

#

The answers

sleek halo Sep 22, 2023, 1:26 AM

#

Oh yeah

#

I should have looked at the numbers more

#

But yeah I’ll probably have to include that in the math then

soft rapids Sep 22, 2023, 1:27 AM

#

I think the equation might be easier

sleek halo Sep 22, 2023, 1:28 AM

#

Yeah since it gives the same thing

soft rapids Sep 22, 2023, 1:28 AM

#

Yesh

sleek halo Sep 22, 2023, 1:28 AM

#

So ye maybe I don’t need to include the 110

#

Since the math will already do it

soft rapids Sep 22, 2023, 1:31 AM

#

Yeah ur right

sleek halo Sep 22, 2023, 1:33 AM

#

Alright so hopefully the program should run

#

But I might be missing a few things I’m not too sure

#

Oh right maybe the break statement

#

But I set a limit in the while

#

To 10000

#

So I’m hoping it would stop there

#

Well I guess I should run it first then

soft rapids Sep 22, 2023, 1:35 AM

#

Yeah it should stop

sleek halo Sep 22, 2023, 1:37 AM

#

Ah but it doesn’t print the numbers right

#

#include <iostream>
using namespace std;
int main () {


        int x = 1000;

        cout << "I am a four-digit number.My first digit is one-third of my last digit,and the sum of my first two digits is equal to my thrid digit.What number am I?";

        while(x < 10000) {

        if(x < 10000) {
        x = x + 1;
        if(x%10 == 3 * x%10000 && x%10000 + x%1000 == x%10) {
        cout << x;

                }
        }
}
return 0;
}```

#

do u know which is wrong then?

soft rapids Sep 22, 2023, 1:40 AM

#

Tbh what u should do is comment out ur entire code, and just focus on making the equation and test it just once until u figure out the equation

soft rapids Sep 22, 2023, 1:40 AM

#

sleek halo do u know which is wrong then?

Uh no I don’t

#

But if ur too tired to focus just sleep

sleek halo Sep 22, 2023, 1:41 AM

#

yeah I probably should

soft rapids Sep 22, 2023, 1:41 AM

#

Cya later

sleek halo Sep 22, 2023, 1:42 AM

#

yeah i'll try to figure it out tomorrow

#

ttyl

cursive dagger Sep 22, 2023, 2:50 AM

#

1466 messages wth

normal juniper Sep 22, 2023, 7:37 AM

#

cursive dagger 1466 messages wth

trolldisgust

sleek halo Sep 22, 2023, 4:51 PM

#

hey guys

#

if(x < 10000) {
        x = x + 1;```

#

could it be because of this statement?

#

since i'm repeating what i said in the while condition in the if condition

#

nvm it just didn't run when i tried it

dark veldt Sep 22, 2023, 5:47 PM

#

Crazy, what are you talking about with so long history tbh .

soft rapids Sep 22, 2023, 5:58 PM

#

sleek halo nvm it just didn't run when i tried it

Did u get any error

soft rapids Sep 22, 2023, 6:06 PM

#

dark veldt Crazy, what are you talking about with so long history tbh .

There’s a screenshot of the question up somewhere lol

normal juniper Sep 22, 2023, 6:11 PM

#

sleek halo ```cpp if(x < 10000) { x = x + 1;```

what’s the full code

sleek halo Sep 22, 2023, 6:13 PM

#

soft rapids Did u get any error

well it just didn't run

#

i changed the placement of the x = x+ 1

#

to under the while statement

#

and removed the first if

sleek halo Sep 22, 2023, 6:14 PM

#

dark veldt Crazy, what are you talking about with so long history tbh .

currently this question
https://media.discordapp.net/attachments/1154099178838970389/1154558724254470174/Screenshot_2023-09-21_at_7.24.05_PM.png?width=2160&height=660

sleek halo Sep 22, 2023, 6:15 PM

#

normal juniper what’s the full code

#include <iostream>
using namespace std;
int main () {


        int x = 1000;

        cout << "I am a four-digit number.My first digit is one-third of my last digit,and the sum of my first two digits is equal to my thrid digit.What number am I?";

        while(x < 10000) {

        if(x < 10000) {
        x = x + 1;
        if(x%10 == 3 * x%10000 && x%10000 + x%1000 == x%10) {
        cout << x;

                }
        }
}
return 0;
}```

dark veldt Sep 22, 2023, 6:18 PM

#

sleek halo currently this question https://media.discordapp.net/attachments/115409917883897...

Seems some logical quiz, isn't it?

soft rapids Sep 22, 2023, 6:19 PM

#

Yeah

sleek halo Sep 22, 2023, 6:19 PM

#

i'm not sure

#

The while says 1000 <10000

soft rapids Sep 22, 2023, 6:20 PM

#

Also I think it didn’t run at all because of your equation

sleek halo Sep 22, 2023, 6:20 PM

#

and it should add 1 each time

#

until it can print out what conditions i put in the second if statement

sleek halo Sep 22, 2023, 6:21 PM

#

soft rapids Also I think it didn’t run at all because of your equation

yeah probably

#

i dont get how

soft rapids Sep 22, 2023, 6:21 PM

#

Also I don’t think u need the first if statement

sleek halo Sep 22, 2023, 6:21 PM

#

yeah its just repeating what the while is saying right

#

lemme get rid of it again

dark veldt Sep 22, 2023, 6:23 PM

#

Btw, do you know ... recursion?

soft rapids Sep 22, 2023, 6:24 PM

#

For ur equation to even run, u need to surround stuff in parenthesis.
For example for this part u need:

x % 10 == (3 * (x % 10000)) && …

sleek halo Sep 22, 2023, 6:24 PM

#

#include <iostream>
using namespace std;
int main () {


        int x = 1000;

        cout << "I am a four-digit number.My first digit is one-third of my last digit,and the sum of my first two digits is equal to my thrid digit.What number am I?";

        while(x < 10000) {

        if(x < 10000) {
        x = x + 1;
        if(x%10 == 3 * x%10000 && x%10000 + x%1000 == x%10) {
        cout << x;

                }
        }
}
return 0;
}#include <iostream>
using namespace std;
int main () {


        int x = 1000;

        cout << "I am a four-digit number.My first digit is one-third of my last digit,and the sum of my first two digits is equal to my thrid digit.What number am I?";

        while(x < 10000) 
        x = x + 1;
        if((x%10) == (3 * (x%10000) && (x%10000) + (x%1000) == (x%100)) { // First is meant to say if the last didgit equals 3 TIMES the fourth digit and second part is meant to say if the first digit PLUS the second digit equals the third digit)
        cout << x;

                }
        }
}
return 0;
}```

sleek halo Sep 22, 2023, 6:24 PM

#

soft rapids For ur equation to even run, u need to surround stuff in parenthesis. For examp...

oh yeah thats a good point

#

also i think i just realized

#

x%10

soft rapids Sep 22, 2023, 6:24 PM

#

I mean most beginners don’t know that until ur code doent run at all

sleek halo Sep 22, 2023, 6:25 PM

#

gives the last digit

#

so for my second part of the condition

#

it should be x%100 to give me the thrid digit i think 🤔

#

Lemme put stuff in parentesis first then

soft rapids Sep 22, 2023, 6:27 PM

#

Idk

sleek halo Sep 22, 2023, 6:27 PM

#

ok i edited it

#

what about this

dark veldt Sep 22, 2023, 6:27 PM

#

I'd like to share the recursion method for you, if you like.

soft rapids Sep 22, 2023, 6:27 PM

#

Honestly what I would do is, open an empty project, and just do short simple tests to see how to find the digits u want

dark veldt Sep 22, 2023, 6:27 PM

#

#include <cstdio> 
#include <vector> 

void check(int digits[], int n, int current, std::vector<int> &result) {
    // if first one is 0, no 4 digit numbers 
    if (digits[0] == 0) return ; 
    // first one is 1/3 of the last one 
    if (digits[0] * 3 != digits[n-1]) return ; 
    // sum of first two equals the thrid 
    if (digits[0] + digits[1] != digits[2]) return ; 
    // who is I ? 
    result.push_back(current); 
}

void search_result(int digits[], int n, int k, int current, std::vector<int> &result) {
    // nothing to enumerate 
    if (k == n) {
        check(digits, n, current, result); 
        return ; 
    }
    // enumerate all possible digits at position k 
    for (int i = 0; i < 10; i++) {
        digits[k] = i; 
        search_result(digits, n, k + 1, current * 10 + i, result); 
    } 
}

int main() {
    int digits[4];
    std::vector<int> result; 
    search_result(digits, 4, 0, 0, result); 
    for (auto i : result) {
        printf("%d ", i); 
    }
    puts(""); 
}

sleek halo Sep 22, 2023, 6:27 PM

#

wow

#

it all looks like greek to me 🥲

#

what is void check

soft rapids Sep 22, 2023, 6:28 PM

#

Yeah I don’t think midnight knows arrays or functions yet so he def won’t know recursion

sleek halo Sep 22, 2023, 6:29 PM

#

i heard an array stores mutilple number but ye i haven't gotten to those yet

dark veldt Sep 22, 2023, 6:29 PM

#

Enumerate all possible four digit numbers, then check it's acceptable or not.

sleek halo Sep 22, 2023, 6:29 PM

#

so far the teachers have taught us up to for loops

dark veldt Sep 22, 2023, 6:30 PM

#

So you even shouldn't use std::vector collection?

sleek halo Sep 22, 2023, 6:30 PM

#

wait list every single one

#

what is vector collection

soft rapids Sep 22, 2023, 6:31 PM

#

I found this code online, it might help u

int main()
{
int dig;
cout << "enter a four dig num " << endl;
cin >> dig ;
int git;
git = (dig % 10);
cout << "num in once place is: " << git << endl;
int one;
one = git;
git = (dig % 100);
cout << "num in tenth place: " << (git - one) / 10 << endl;
git = (dig % 1000);
cout << "num in hundredth:" << (git - one) / 100 << endl;
git = (dig % 10000);
cout << "num in thousandth: " << (git - one) / 1000 << endl;
return 0;
}

dark veldt Sep 22, 2023, 6:31 PM

#

A dynamic list-like collection for you to collect your answers together, even when you can't know the total size of them.

#

I'd like to use it to collect all information then output my answer in a next separate step.

sleek halo Sep 22, 2023, 6:33 PM

#

yeah sounds useful

#

but I've only gone up four loops in the lesson so my prof probably won't let me use anything farther than that

dark veldt Sep 22, 2023, 6:34 PM

#

Ummm, I can give another easy solution only concern loop.

sleek halo Sep 22, 2023, 6:34 PM

#

well the one i'm working on rn is just with while loops so i can't even use for loops yet for this

dark veldt Sep 22, 2023, 6:34 PM

#

Can you use function?

sleek halo Sep 22, 2023, 6:34 PM

#

so what is that

soft rapids Sep 22, 2023, 6:34 PM

#

I don’t think he can

#

His instructions just say to use a while loop

#

All he needs to do right now is figure out one equation and he should be done

sleek halo Sep 22, 2023, 6:35 PM

#

yeah this is what i've done do far

#

#include <iostream>
using namespace std;
int main () {


        int x = 1000;

        cout << "I am a four-digit number.My first digit is one-third of my last digit,and the sum of my first two digits is equal to my thrid digit.What number am I?";

        while(x < 10000) 
        x = x + 1;
        if((x%10) == (3 * (x%10000) && (x%10000) + (x%1000) == (x%100)) { // First is meant to say if the last didgit equals 3 TIMES the fourth digit and second part is meant to say if the first digit PLUS the second digit equals the third digit)
        cout << x;

                }
        }
}
return 0;
}```

#

oh i copied it twice

#

what i'm not understanding is how what i wrote for the math wouldn;t print

#

10 is supose to grab the last digit

#

100, theird

#

1000, the second

#

and 10000, the first

#

so with that in mind, what could i be doing wrong

soft rapids Sep 22, 2023, 6:38 PM

#

int main()
{
int n = 7569;
int th,h,t,u; // Thousands,hundreds,tens,units

u=n%10; 
t=(n/10)%10; 
h=(n/100)%10; 
th=n/1000;

#

Um let me look

sleek halo Sep 22, 2023, 6:39 PM

#

so 7569%10 supose to give me 9

#

7569/10 gets rid of the 9, then grabs the next digit being 6

dark veldt Sep 22, 2023, 6:40 PM

#

Ummm, the second demo I can give you like this:

sleek halo Sep 22, 2023, 6:40 PM

#

7569/100 gets rid of both 69 and grabs 5

dark veldt Sep 22, 2023, 6:40 PM

#

#include <cstdio> 
#include <cstdlib> 
#include <vector> 

int main() {
    std::vector<int> rst; 
    for (int current;;current += 1) {
        std::div_t output; 
        int first, second, third, fourth; 
        output = div(current, 10); 
        fourth = output.rem; 
        output = div(output.quot, 10); 
        third = output.rem; 
        output = div(output.quot, 10); 
        second = output.rem; 
        output = div(output.quot, 10); 
        first = output.rem; 
        // if current can't expressed in four digits, break. 
        if (output.quot != 0) break; 
        // if first is 0, it's not the four digits number. 
        if (first == 0) continue; 
        // first one is 1/3 of the last one 
        if (first * 3 != fourth) continue; 
        // sum of first two equals the third 
        if (first + second != third) continue; 
        rst.push_back(current); 
    }
    for (auto c: rst) {
        printf("%d ", c); 
    }
    puts(""); 
}

soft rapids Sep 22, 2023, 6:41 PM

#

sleek halo 7569/100 gets rid of both 69 and grabs 5

Yeah

sleek halo Sep 22, 2023, 6:41 PM

#

so are u saying i should get rid of the number after it prints???

soft rapids Sep 22, 2023, 6:41 PM

#

Uh no

#

Just so you know, the “n” value was never changed in all of those conversions

#

Only used for it’s 7569

sleek halo Sep 22, 2023, 6:42 PM

#

yeah

#

the x = x+ 1

#

is meant to change it

soft rapids Sep 22, 2023, 6:42 PM

#

Oh yeah that’s fine

sleek halo Sep 22, 2023, 6:42 PM

#

but its not doing that

#

at least when it run it

soft rapids Sep 22, 2023, 6:43 PM

#

Because u need to do that conversion for every single number from 1,000 to whatever

sleek halo Sep 22, 2023, 6:43 PM

#

actually u know lemme run what i hvae so far

soft rapids Sep 22, 2023, 6:43 PM

#

Oooh I see

#

You’re missing some syntax after your while loop condition lol

sleek halo Sep 22, 2023, 6:46 PM

#

btw what is syntax

#

i've seen that word being used but i still don't know what it means

soft rapids Sep 22, 2023, 6:46 PM

#

Like curly brackets, semi colons, parenthesis

#

That are required in ur code otherwise it’ll give u a fatass error

dark veldt Sep 22, 2023, 6:47 PM

#

Syntax is something make the compiler know what you're talking about.

soft rapids Sep 22, 2023, 6:47 PM

#

Or it won’t work like how u intend it to

#

Like if u forgot curly brackets after an if statement, that if statement will only run 1 instruction instead of however many u wanted it to

sleek halo Sep 22, 2023, 6:47 PM

#

dark veldt Syntax is something make the compiler know what you're talking about.

ohh

sleek halo Sep 22, 2023, 6:47 PM

#

soft rapids That are required in ur code otherwise it’ll give u a fatass error

ohh i see

soft rapids Sep 22, 2023, 6:47 PM

#

Yeah so.. ur while loop is missing something important

sleek halo Sep 22, 2023, 6:48 PM

#

so i need a {

#

after my while

soft rapids Sep 22, 2023, 6:48 PM

#

Yep

sleek halo Sep 22, 2023, 6:48 PM

#

#include <iostream>
using namespace std;
int main () {


        int x = 1000;

        cout << "I am a four-digit number.My first digit is one-third of my last digit,and the sum of my first two digits is equal to my thrid digit.What number am I?";

        while(x < 10000){
        x = x + 1;
        if((x%10) == (3 * (x%10000) && (x%10000) + (x%1000) == (x%100)) { // First is meant to say if the last didgit equals 3 TIMES the fourth digit and second part is meant to say if the first digit PLUS the second digit equals the third digit)
        cout << x;

                }
        }
}
return 0;
}```

#

oh my bad i stillneed to edit

soft rapids Sep 22, 2023, 6:48 PM

#

sleek halo after my while

Nono before

sleek halo Sep 22, 2023, 6:48 PM

#

before?

soft rapids Sep 22, 2023, 6:48 PM

#

Uh I mean after the condition

#

The starting bracket

#

U have the end

sleek halo Sep 22, 2023, 6:49 PM

#

oh alright

#

like this right?

soft rapids Sep 22, 2023, 6:49 PM

#

Another reason why u rlly need a good IDE lol

#

Yeah

#

Also I think you have 1 too many curly brackets at the end

dark veldt Sep 22, 2023, 6:50 PM

#

Yes, what's your dev environment?

sleek halo Sep 22, 2023, 6:50 PM

#

alright this is how i hve it

#

#include <iostream>
using namespace std;
int main () {


        int x = 1000;

        cout << "I am a four-digit number.My first digit is one-third of my last digit,and the sum of my first two digits is equal to my thrid digit.What number am I?";

        while(x < 10000) {
        x = x + 1;
        if(x%10) == ((3 * (x%10000) && (x%10000) + (x%1000) == (x%100) {
        cout << x;
                }

        }

return 0;
}```

soft rapids Sep 22, 2023, 6:50 PM

#

dark veldt Yes, what's your dev environment?

He uses text terminal I think

sleek halo Sep 22, 2023, 6:50 PM

#

yeah just terminal

soft rapids Sep 22, 2023, 6:50 PM

#

Ok that’s much better

dark veldt Sep 22, 2023, 6:50 PM

#

Crazy ?!

sleek halo Sep 22, 2023, 6:51 PM

#

ah and now the parenthesis is the issue

sleek halo Sep 22, 2023, 6:51 PM

#

dark veldt Crazy ?!

man everyone keeps saying that

#

this is just what the teacher said to use only

#

at least on a mac, on windows, i think u gotta download something else

#

to code

soft rapids Sep 22, 2023, 6:53 PM

#

sleek halo this is just what the teacher said to use only

Wtf I can’t think of a single reason why she would want that

dark veldt Sep 22, 2023, 6:53 PM

#

Such unusual requirements.

soft rapids Sep 22, 2023, 6:53 PM

#

Agreed

sleek halo Sep 22, 2023, 6:54 PM

#

soft rapids Wtf I can’t think of a single reason why she would want that

i think one teacher meantioned, downloading other places to work on gives u the answers

#

so since u need to manually learn how to code every single thing on ur own

#

ye i think the teacher mentioned something like that

dark veldt Sep 22, 2023, 6:54 PM

#

sleek halo ```cpp #include <iostream> using namespace std; int main () { int x = ...

It seems bad when you write so many expressions in one sentence. Why not use some temp variables to store the result of simple evaluations as a mid step.

sleek halo Sep 22, 2023, 6:55 PM

#

ok temp variable

#

is the temp being declared

#

or is that something else

#

#include <iostream>
using namespace std;
int main () {```

#

u mean this part?

soft rapids Sep 22, 2023, 6:56 PM

#

He doesn’t need to store the result though

sleek halo Sep 22, 2023, 6:56 PM

#

this is just what the teacher said to write always

soft rapids Sep 22, 2023, 6:56 PM

#

The only thing he’s printing is the x variable

sleek halo Sep 22, 2023, 6:56 PM

#

the standard beginging

soft rapids Sep 22, 2023, 6:56 PM

#

Unless he needs to use the result for something

#

Idek

dark veldt Sep 22, 2023, 6:57 PM

#

No, I mean you can use more variables in the inner loop.

soft rapids Sep 22, 2023, 6:57 PM

#

dark veldt No, I mean you can use more variables in the inner loop.

So what do u think is a good way to write the equation? Because idk

sleek halo Sep 22, 2023, 6:57 PM

#

inside the while loop, i need more varaibles 🤔

#

but don't i need just one to work with the number

#

could u elaborate on what u mean

dark veldt Sep 22, 2023, 6:58 PM

#

For example, to evaluate the fourth digit of your number, write int l = x % 10;

soft rapids Sep 22, 2023, 6:58 PM

#

Oh I see what ur saying now

sleek halo Sep 22, 2023, 6:58 PM

#

ohh

#

each digit

soft rapids Sep 22, 2023, 6:58 PM

#

Yeah that would be more clean

sleek halo Sep 22, 2023, 6:58 PM

#

has a varibale

#

right??

soft rapids Sep 22, 2023, 6:58 PM

#

Exactly

#

And then u do the equation with the variables

dark veldt Sep 22, 2023, 6:59 PM

#

Then less paren would be needed in your condition.

sleek halo Sep 22, 2023, 6:59 PM

#

ok that could work

soft rapids Sep 22, 2023, 6:59 PM

#

So it’s easier to read

dark veldt Sep 22, 2023, 6:59 PM

#

And you won't mismatch your condition expression in this style.

soft rapids Sep 22, 2023, 6:59 PM

#

And just name each variable the correct place it is

soft rapids Sep 22, 2023, 6:59 PM

#

dark veldt And you won't mismatch your condition expression in this style.

Ur exactly right

sleek halo Sep 22, 2023, 7:00 PM

#

alright so instead of int x = 1000
i can do
int a =
int b =
int c =
int d =

#

i ogtta make it equal to the mod things

#

so int a = x%10

dark veldt Sep 22, 2023, 7:01 PM

#

Are you sure? Then a would be 100.

sleek halo Sep 22, 2023, 7:02 PM

#

1000%10 would make a the last digit no?

dark veldt Sep 22, 2023, 7:02 PM

#

Returns 0, which is what you want.

sleek halo Sep 22, 2023, 7:02 PM

#

dark veldt Are you sure? Then `a` would be `100`.

also i put the division sign by accident if thats what u mean

sleek halo Sep 22, 2023, 7:03 PM

#

dark veldt Returns 0, which is what you want.

isn't return 0 to terminate the program?

dark veldt Sep 22, 2023, 7:03 PM

#

I mean you need to repeat dividing then do modulo operations.

dark veldt Sep 22, 2023, 7:03 PM

#

sleek halo isn't return 0 to terminate the program?

Maybe you're talking about return 0; statement in main function.

sleek halo Sep 22, 2023, 7:04 PM

#

yeah

#

the statement at the end

dark veldt Sep 22, 2023, 7:04 PM

#

I mean the expression 1000 % 10 would returns the 0 when evaluation.

sleek halo Sep 22, 2023, 7:04 PM

#

oh thats right

#

so i need to make it first that 1000 changes

#

but isn't that done with the x++

#

could u maybe code what u mean then?

dark veldt Sep 22, 2023, 7:05 PM

#

sleek halo so i need to make it first that 1000 changes

wdym

#

I just suggest you use local variables to simplify your expressions to avoid bugs.

sleek halo Sep 22, 2023, 7:05 PM

#

dark veldt I mean the expression `1000 % 10` would returns the `0` when evaluation.

well ur saying since my x = 1000

#

if i just %

#

it would grab and print the zero

dark veldt Sep 22, 2023, 7:06 PM

#

You shouldn't just do modulo but more things.

sleek halo Sep 22, 2023, 7:06 PM

#

oh alright

dark veldt Sep 22, 2023, 7:06 PM

#

int a = x % 10; int b = (x / 10) % 10; int c = (x / ...) ...;

#

Move the caocluating operations out of the if condition statements to make it clear.

sleek halo Sep 22, 2023, 7:07 PM

#

right if i just made the varible each digit number, i would still be doing the same thing still

sleek halo Sep 22, 2023, 7:07 PM

#

dark veldt `int a = x % 10; int b = (x / 10) % 10; int c = (x / ...) ...; `

but in here the math is being done

#

in the varaibles

#

#include <iostream>
using namespace std;
int main () {

        
        int x = 1000;
        int a = x%10;
        int b = (x / 10) % 10;
        int c = (x / 100) % 10;
        cout << "I am a four-digit number.My first digit is one-third of my last digit,and the sum of my first two digits is equal to my thrid digit.What number am I?";

        while(x < 10000) {
        x = x + 1;
        if(x%10) == ((3 * (x%10000) && (x%10000) + (x%1000) == (x%100) {
        cout << x;
                }

        }

return 0;
}```

#

i might have understood wrong

dark veldt Sep 22, 2023, 7:10 PM

#

Yes, x is changing in the loop scope.

#

a, b, c, wouldn't changing when x is changing.

#

C programming language is a process oriented language, to describe some variable assignment operations with step by step statement. It's not a language to describe some mathematical INVARIANT.

sleek halo Sep 22, 2023, 7:13 PM

#

so i cant make a b c equal to the math?

dark veldt Sep 22, 2023, 7:13 PM

#

After one assignment statement, it assigns at that time.

#

It won't keep forever, if you changes something in the future.

soft rapids Sep 22, 2023, 7:15 PM

#

sleek halo ```cpp #include <iostream> using namespace std; int main () { ...

Look at ur code where ur variables are, they will be assigned to digits of “1,000” right

sleek halo Sep 22, 2023, 7:15 PM

#

the int x= 1000

#

yeah

soft rapids Sep 22, 2023, 7:15 PM

#

Yep

#

Now look inside ur while loop

#

It’s just using the x variable, but all the Variables you made aren’t getting updated inside your loop

sleek halo Sep 22, 2023, 7:16 PM

#

there is a x = x+ 1
and the if statement with the math
and then x print statement

soft rapids Sep 22, 2023, 7:16 PM

#

Yeah

#

It will work, but you want to use your variables to simplify the equation right

#

So in your equation, first thing is “x%10”

sleek halo Sep 22, 2023, 7:17 PM

#

yea

soft rapids Sep 22, 2023, 7:17 PM

#

Instead of that, it would be the variable “a”

#

Or whatever variable

sleek halo Sep 22, 2023, 7:17 PM

#

right alright

#

so a = x%10

soft rapids Sep 22, 2023, 7:17 PM

#

Variable unit

#

I’d Call them unit, tens, hundreds, thousands

#

Tbh

#

So , you need to move the code where u made ur variables to BEFORE if statement

#

And then once your variables are all set to their digits

#

Then do the math

#

Sorry I fucked up I edited it

#

Then do math inside if statement condition

sleek halo Sep 22, 2023, 7:20 PM

#

after my while statement

soft rapids Sep 22, 2023, 7:20 PM

#

if (tens == hundreds * 3 … ) {
cout << x;
}

sleek halo Sep 22, 2023, 7:20 PM

#

i need to declare these varibles

soft rapids Sep 22, 2023, 7:20 PM

#

Yeah

#

Yep

#

BC you want those digit variables to update every time x changes

#

Otherwise the digit variables will be set to 1,000 and never change, u don’t want that

sleek halo Sep 22, 2023, 7:22 PM

#

#include <iostream>
using namespace std;
int main () {

        
        int x = 1000;
       
        cout << "I am a four-digit number.My first digit is one-third of my last digit,and the sum of my first two digits is equal to my thrid digit.What number am I?";

        while(x < 10000) {
        x = x + 1;
        int unit = x%10;
        int tens = (x / 10) % 10;
        int hundreds = (x / 100) % 10;
        int thousands = (x / 1000);
        if(x%10) == ((3 * (x%10000) && (x%10000) + (x%1000) == (x%100) {
        cout << x;
                }

        }

return 0;
}```

soft rapids Sep 22, 2023, 7:22 PM

#

Yes exactlyyy

#

Now all u have to do is make your equation more readable by using your variables

sleek halo Sep 22, 2023, 7:23 PM

#

so each varibles grabs a different digit

soft rapids Sep 22, 2023, 7:23 PM

#

Yep

sleek halo Sep 22, 2023, 7:23 PM

#

so now for the if statement part

soft rapids Sep 22, 2023, 7:23 PM

#

Also for the thousands place

#

You only need to divide by 1,000

#

Delete the % 10

sleek halo Sep 22, 2023, 7:24 PM

#

how come

soft rapids Sep 22, 2023, 7:24 PM

#

#

Idk just the math

sleek halo Sep 22, 2023, 7:25 PM

#

but dont need the % to grab it

#

i guess since it touches the first digit

#

no?

soft rapids Sep 22, 2023, 7:26 PM

#

If u divide the number by 1,000

#

You will always get that 1,000th digit

#

So if it’s 5,000 divided by 1,000

#

It’s 5

#

Etc

sleek halo Sep 22, 2023, 7:26 PM

#

and if i % after

#

it woulnd't do anything

soft rapids Sep 22, 2023, 7:28 PM

#

Idk u can just test it in another terminal and see what all the math does

sleek halo Sep 22, 2023, 7:28 PM

#

yeah i'll do it after i fix the if statement

#

so now i just gotta make the conditions

#

do what i want

#

one sec

#

#include <iostream>
using namespace std;
int main () {

        
        int x = 1000;
       
        cout << "I am a four-digit number.My first digit is one-third of my last digit,and the sum of my first two digits is equal to my thrid digit.What number am I?";

        while(x < 10000) {
        x = x + 1;
        int unit = x%10;
        int tens = (x / 10) % 10;
        int hundreds = (x / 100) % 10;
        int thousands = (x / 1000);
        if(thousands == 3 * unit && thousands + hundreds == tens) {
        cout << x;
                }

        }

return 0;
}```

#

something like this?

dark veldt Sep 22, 2023, 7:41 PM

#

Match the parenthesis correctly..

#

thousands == 3 * unit is also wrong, pls reconsider the question description again.

sleek halo Sep 22, 2023, 7:44 PM

#

wait why is that wrong

#

thouands

#

holds x/1000

#

which holds the first digit

dark veldt Sep 22, 2023, 7:44 PM

#

thousands is the first digit, unit is the last.

sleek halo Sep 22, 2023, 7:45 PM

#

i saying if the first digit equal to 3 * last digit

dark veldt Sep 22, 2023, 7:45 PM

#

What it means my first digit is one-third of my last digit.

sleek halo Sep 22, 2023, 7:45 PM

#

but thats what i want

#

sleek halo Sep 22, 2023, 7:47 PM

#

dark veldt What it means *my first digit is one-third of my last digit*.

yeah if it syas that, isn't it right?

dark veldt Sep 22, 2023, 7:47 PM

#

Maybe the correct statement is thousands * 3 == unit.

sleek halo Sep 22, 2023, 7:48 PM

#

first digit times 3

acoustic pulsar Sep 22, 2023, 7:48 PM

#

Am I on trees or what?

sleek halo Sep 22, 2023, 7:48 PM

#

= last digit

acoustic pulsar Sep 22, 2023, 7:48 PM

#

1 min ago?

dark veldt Sep 22, 2023, 7:48 PM

#

acoustic pulsar Am I on trees or what?

I'm also confused on this situation.

sleek halo Sep 22, 2023, 7:48 PM

#

damn almost 2000 messages 💀

steel moat Sep 22, 2023, 7:50 PM

#

sleek halo damn almost 2000 messages 💀

thats what I just wondered wtf lol

sleek halo Sep 22, 2023, 7:50 PM

#

dark veldt Maybe the correct statement is `thousands * 3 == unit`.

the last digit is supose to be 3 times more than the 1st

dark veldt Sep 22, 2023, 7:51 PM

#

Are you sure?

sleek halo Sep 22, 2023, 7:51 PM

#

so if the firgit * 3, it would make the first digit three times more than the last right?

sleek halo Sep 22, 2023, 7:52 PM

#

dark veldt Are you sure?

no cause well i'm always wrong but i'm not understanding how having 3 times the first digit would make it one third of the last digit

dark veldt Sep 22, 2023, 7:52 PM

#

Test latex math support $x = \frac13 y$

dark veldt Sep 22, 2023, 7:53 PM

#

sleek halo no cause well i'm always wrong but i'm not understanding how having 3 times the ...

No, You shouldn't calculate the one-third of a value.

#

What would happen when you want to accurate get one-third of some int value like 4.

sleek halo Sep 22, 2023, 7:54 PM

#

But then it’s not supose to print

#

Only supose to print numbers that meet those conditions

dark veldt Sep 22, 2023, 7:55 PM

#

I just tell you it's impossible to get one-third of any int.

#

So we play a trick on this to avoid problem.

#

Do both integer multiplication on the both sides to avoid the decimal problem.

sleek halo Sep 22, 2023, 7:57 PM

#

So u want me to muilply 3 with thousands and unit???

dark veldt Sep 22, 2023, 7:58 PM

#

I just tell you the solution to avoid decimal problem.

sleek halo Sep 22, 2023, 7:58 PM

#

Alright I think I may be misunderstanding

#

What I’m confused about is

#

The decimal problem

dark veldt Sep 22, 2023, 7:59 PM

#

If you do integer division, like 4 / 3, you would just get 1 but not 1.33... in C type system.

sleek halo Sep 22, 2023, 7:59 PM

#

Why would there be a decimal be a problem if I declared the variables with int and not double

dark veldt Sep 22, 2023, 7:59 PM

#

Because you now need a division, 'one-third' operation.

soft rapids Sep 22, 2023, 8:00 PM

#

It SHould be fine though right, he doesn’t need to get the decimal value right

#

Rounding should get answers

dark veldt Sep 22, 2023, 8:01 PM

#

In math, integer division is not complete.

sleek halo Sep 22, 2023, 8:01 PM

#

But only integer numbers are being printed out anyway

dark veldt Sep 22, 2023, 8:01 PM

#

So pls use multiplication to avoid this problem, but not do the stupid floating division.

dark veldt Sep 22, 2023, 8:02 PM

#

sleek halo But only integer numbers are being printed out anyway

That's unrelated.

#

We're talking about the trouble predicate, with one-third condition.

sleek halo Sep 22, 2023, 8:03 PM

#

Ok so if we want the program to be accurate like u said

#

In that case shouldn’tI just declare the variables as double

#

Instead of int

dark veldt Sep 22, 2023, 8:04 PM

#

wdym

#

You prefer double x;?

sleek halo Sep 22, 2023, 8:05 PM

#

Since u said it wouldn’t print the correct division

#

No

dark veldt Sep 22, 2023, 8:05 PM

#

I mean it wouldn't evaluate the correct division.

sleek halo Sep 22, 2023, 8:05 PM

#

Because everything in the code is using integers

soft rapids Sep 22, 2023, 8:05 PM

#

What happens when u run ur program rn?

sleek halo Sep 22, 2023, 8:05 PM

#

But I’m trying to understand what u are saying

sleek halo Sep 22, 2023, 8:06 PM

#

soft rapids What happens when u run ur program rn?

Good point lemme try and run it

soft rapids Sep 22, 2023, 8:06 PM

#

Wait also add a space after the cout

sleek halo Sep 22, 2023, 8:06 PM

#

Gimme me five minutes

soft rapids Sep 22, 2023, 8:06 PM

#

And the. Run it

#

And then

dark veldt Sep 22, 2023, 8:07 PM

#

I must notify you that it's a bad practice, when you code, you just check the output to trust your program rather than prove it in math.

soft rapids Sep 22, 2023, 8:07 PM

#

cout << x << “ “;

sleek halo Sep 22, 2023, 8:11 PM

#

soft rapids cout << x << “ “;

wait if i have it just x;

#

is it only gonna printt once?

soft rapids Sep 22, 2023, 8:12 PM

#

Did u run it?

dark veldt Sep 22, 2023, 8:12 PM

#

loop repeats the print operations......

sleek halo Sep 22, 2023, 8:14 PM

#

yeah

sleek halo Sep 22, 2023, 8:15 PM

#

soft rapids cout << x << “ “;

could u quickly explain what cout << x << " "; would mean

soft rapids Sep 22, 2023, 8:15 PM

#

It prints out the number of x

#

And then prints out a space

sleek halo Sep 22, 2023, 8:15 PM

#

in the x varible it prints out the number anyway

#

ohh

dark veldt Sep 22, 2023, 8:15 PM

#

Nearly equivalent to

cout << x; 
cout << " ";

sleek halo Sep 22, 2023, 8:15 PM

#

the quotes are for space

soft rapids Sep 22, 2023, 8:15 PM

#

So instead of 123
It prints
1 2 3

sleek halo Sep 22, 2023, 8:15 PM

#

ohh alrigtht good to know

#

that means i need to do that so it does space

#

#

alright this is how it runs

dark veldt Sep 22, 2023, 8:17 PM

#

But it's wrong obviously.

sleek halo Sep 22, 2023, 8:17 PM

#

i need to put endl after what number am i

dark veldt Sep 22, 2023, 8:17 PM

#

Reconsider your condition evaluation.

sleek halo Sep 22, 2023, 8:18 PM

#

the output seems to stop before 4000

#

and yeah it is

#

well i mean it follows the condition

#

first two numbers

#

add up to the third

dark veldt Sep 22, 2023, 8:19 PM

#

Are you sure?

sleek halo Sep 22, 2023, 8:19 PM

#

last number is 1/3 of the first

#

it apears to me that the numbers do fit these conditions

#

its just that i didn't realize the output stopedbefore 4 thousand

#

what i don't understand is why because its supose to guess all the 4 digit numbers

sleek halo Sep 22, 2023, 8:21 PM

#

dark veldt But it's wrong obviously.

okay i'm sorry to ask u mutilple times but can you please explain the problem again?

dark veldt Sep 22, 2023, 8:21 PM

#

sleek halo what i don't understand is why because its supose to guess all the 4 digit numbe...

If you condition is proper, it's casual whatever it guess.

dark veldt Sep 22, 2023, 8:21 PM

#

sleek halo okay i'm sorry to ask u mutilple times but can you please explain the problem ag...

This condition is wrong: thousands == 3 * unit

#

first digit is one-third of last digit

#

It means the condition like thousands == 1 / 3 * unit.

sleek halo Sep 22, 2023, 8:22 PM

#

hwo could that condition be wrong if the question is asking for that condition 😭

#

ok nvm just proceed

dark veldt Sep 22, 2023, 8:23 PM

#

I have already told you the key..

sleek halo Sep 22, 2023, 8:23 PM

#

ur telling me about decimals

#

from what i understand

#

u said if a number like 4/3

dark veldt Sep 22, 2023, 8:23 PM

#

dark veldt It means the condition like `thousands == 1 / 3 * unit`.

You need to describe the condition like that.

sleek halo Sep 22, 2023, 8:23 PM

#

the output would just print the integer

dark veldt Sep 22, 2023, 8:23 PM

#

dark veldt This condition is wrong: `thousands == 3 * unit`

That's something you have written actually.

sleek halo Sep 22, 2023, 8:24 PM

#

dark veldt You need to describe the condition like that.

oh

dark veldt Sep 22, 2023, 8:24 PM

#

sleek halo the output would just print the integer

Unrelated to the output operation.

#

But it's dangerous to describe a condition with division operations with int type.

sleek halo Sep 22, 2023, 8:24 PM

#

first digit = 1/3 last digit

dark veldt Sep 22, 2023, 8:25 PM

#

Then I suggest you to play a trick on it, with a better and equivalent condition.

sleek halo Sep 22, 2023, 8:25 PM

#

so it would be 3(first digit) = 1/3 *1(last digit)

dark veldt Sep 22, 2023, 8:26 PM

#

first digit = 1/3 last digit

#

then, 3 * first digit = 3 * 1/3 last digit

#

then 3 * first digit = last digit.

#

The equation implied.

#

So the condition you should use is like that 3 * thounsands == unit.

#

Don't you agree?

sleek halo Sep 22, 2023, 8:27 PM

#

3 * 3(first digit) = 3 * 1/3 (9)(lastdigit) ??

#

3 * fristdigit = lastdigit

#

is what ur saying?

#

but wouldn't that make the first digit 3 times more than the last

#

hold on lemme read my code

#

#include <iostream>
using namespace std;
int main () {


        int x = 1000;

        cout << "I am a four-digit number.My first digit is one-third of my last digit,and the sum of my first two digits is equal to my thrid digit.What number am I?";

        while(x < 10000) {
        x = x + 1;
        int unit = x%10;
        int tens = (x / 10) % 10;
        int hundreds = (x / 100) % 10;
        int thousands = (x / 1000);
        if(thousands == 3 * unit && thousands + hundreds == tens) {
        cout << x << " ";
                }

        }

return 0;
}```

#

this is what i have

#

but ur saying

#

thousands * 3 == unit

dark veldt Sep 22, 2023, 8:31 PM

#

......

#

My first digit is one-third of my last digit.

dark veldt Sep 22, 2023, 8:32 PM

#

sleek halo but wouldn't that make the first digit 3 times more than the last

Why you say the first digit should be 3 times more than the last?

sleek halo Sep 22, 2023, 8:32 PM

#

so what i have rn is saying my first digit is equal to 3 times my last digit

sleek halo Sep 22, 2023, 8:32 PM

#

dark veldt Why you say the first digit should be 3 times more than the last?

the first digit for example

#

could be 9

#

right

#

and what im hoping is

#

the last digit should be a third one of 9

#

3

dark veldt Sep 22, 2023, 8:33 PM

#

So you think it's correct, when first is 9 and last is 3?

sleek halo Sep 22, 2023, 8:33 PM

#

yea

dark veldt Sep 22, 2023, 8:34 PM

#

My first digit(9) is one-third of my last digit(3).

#

Are you sure?

sleek halo Sep 22, 2023, 8:34 PM

#

i had it reverse ohh

#

i see it now

dark veldt Sep 22, 2023, 8:34 PM

#

Fix it by yourself.

sleek halo Sep 22, 2023, 8:36 PM

#

ok i think since i saw one third near the last digit, in my brain i kept thinking the last digit should be more

#

okay

#

#include <iostream>
using namespace std;
int main () {


        int x = 1000;

        cout << "I am a four-digit number.My first digit is one-third of my last digit,and the sum of my first two digits is equal to my thrid digit.What number am I?" << endl;

        while(x < 10000) {
        x = x + 1;
        int unit = x%10;
        int tens = (x / 10) % 10;
        int hundreds = (x / 100) % 10;
        int thousands = (x / 1000);
        if(thousands * 3 == unit && thousands + hundreds == tens) {
        cout << x << " ";
                }

        }

return 0;
}```

#

this time it stoped before 4000

#

#

okay but what was the other thing u were meanioning?

#

about the deciamls?

sleek halo Sep 22, 2023, 8:41 PM

#

dark veldt I just tell you the solution to avoid decimal problem.

like this part

#

were u refering to the same thing?

#

i thought u were talking about doing math with decimals so I was confused

#

but yeah since it runs now and my questions are done, I'll go now

lean spindleBOT Sep 22, 2023, 8:57 PM

#

Did you really just try to ping 28,656 people?

sleek halo Sep 22, 2023, 8:57 PM

#

...

#

oops

#

i thought it would just ping the people here uhh

#

but ye thanks everyone for the help

#

!solved

lean spindleBOT Sep 22, 2023, 8:58 PM

#

Thank you and let us know if you have any more questions!

This thread is now set to auto-hide after an hour of inactivity

sleek halo Sep 22, 2023, 9:05 PM

#

dark veldt Fix it by yourself.

also thank you, you made me see a mistake i had after saying it multiple times but i didn't understand so i'm sorry about that, I'm still not sure what u meant by the decimals but thank u

burnt charm Sep 22, 2023, 9:08 PM

#

sleek halo i thought it would just ping the people here uhh

All good 🙂

dark veldt Sep 23, 2023, 4:47 AM

#

sleek halo also thank you, you made me see a mistake i had after saying it multiple times b...

You solve your problem correctly. About decimal, you would know it in your future lessons. Don't be worried.

normal juniper Sep 23, 2023, 2:31 PM

#

dang it’s finally over

#

after neary 2k messages

burnt charm Sep 23, 2023, 2:32 PM

#

normal juniper after neary 2k messages

what 💀 💀 💀

soft rapids Sep 23, 2023, 4:31 PM

#

normal juniper after neary 2k messages

LMAO

#

I was kinda hoping we would reach the 2k mark

#

Maybe slowly one day

quartz mesa Sep 24, 2023, 12:22 AM

#

2k messages for repeatedly asking for input

#I need help to understand how to do these problems with while loops