School assignment

[spice sorrel]

<@&987246746478460948> please have a look, thanks.

[cyan rain]

can you please directly share your question

dont ask to ask

and share everything here

so people can actually help

[edgy oak]

Also share where/why you got stuck.

[cyan rain]

well we wont spoonfeed the solution

we help you do it yourself

[rapid pasture]

the likelyhood that your professor is here is almost 0

[cyan rain]

wouldnt say that

but I would say it doesnt matter

[rapid pasture]

it's not against the rules to get help, it's against the rules to use code that isnt yours

[cyan rain]

we wont give the solution

[winter estuary]

okk I get it

so basically should I send the codes that I already have and explain where i’m stuck?

[rapid pasture]

Yup

[cyan rain]

yeah

[edgy oak]

And please use:

[spice sorrel]

Please use this format for posting code:

```java
// Example java program
int value = 5;
System.out.println(value);
```

Which results in:

// Example java program
int value = 5;
System.out.println(value);

For syntax highlighting, you have to add the name of the language after the three backticks, like ```java. Please make sure to use exactly this format, so no space between the backticks and the language name, and a newline before the code starts. If done right, the syntax highlighting will even be applied to your text as you type, before sending.

simon_verhoeven • used /tag id: code · May 28, 2024, 7:08 PM

[winter estuary]

what if my program doesn’t have an error but just needs an extension to it. I don’t want someone to send me the code but just to explain how to go about it

[cyan rain]

dw

just state your problem

as said before we wont spoonfeed

[winter estuary]

okayy so basically it’s an encryption and decryption program that needs to meet certain demands, and there’s this one where you have to ask the user to input a 4 digita value that are going to be used in rotation to decrypt/encrypt the message

using the mod operator I think and it’s just confusing to set that up in a loop

[harsh island]

sounds like a modified caesar cipher. Have you implemented the plain-jane caesar cipher yet? If not i suggest doing that (both encrypt + decrypt) and iterating from there

[cyan rain]

and please give more context

[winter estuary]

yess it is the caesar cipher, but the thing is my teacher said we have to come up with our own codes using the materials learned in class

I guess i’m really struggling with whether I should great 4 new variables for each number of the code and how am I supposed to implement the mod operator

[harsh island]

so what do you mean by the 4 variables like

x1 x2 x3 x4 x5 x6 x7 x8
|  |  |  |  |  |  |  |
v  v  v  v  v  v  v  v
+A +B +C +D +A +B +C +D
```?

[spice sorrel]

Detected code, here are some useful tools:

[harsh island]

where the shift isnt constant but rotated by one of 4 possible values

[winter estuary]

like an integer variable for each number in the 4 digit key that the user inputs

I’m not even sure if i should do that

I just need to know whether it’s a good idea or not

[harsh island]

are you encrypting the 4 digit input or is that being used as the encryption key

[winter estuary]

the encryption key

[harsh island]

ok, so if the user enters 2573 what does that do

[winter estuary]

its supposed to shift each character in the message by that value in order

but if the message it’s longer than 4

it just like

[harsh island]

so you're shifting each character by 2573 characters?

[winter estuary]

no, the first one gets shifted by 2, the second by 5, the third by 7 the fourth by 3 and if the message is longer it just goes back to 2 and repeats

[harsh island]

My interpretation of what it should be is the
1st character -> +2 chars
2nd character -> +5 chars
3rd character -> +7 chars
4th character -> +3 chars
5th character -> +2 chars

yea

[winter estuary]

okayy that sounds smart

thank you for the idea

[harsh island]

wdym thats exactly the thing u just said in a vertical format

but use an int[] for the offset values, not individual variables

[winter estuary]

what’s offest value

[harsh island]

the 2 5 7 3

[winter estuary]

but the thing is

the key is like one single number with 4 digits

that I don’t know what they’re going to be so i can’t just add each number to a character

[harsh island]

right, thats why you store the input in variables or an a array

[cyan rain]

prefer array

or even a dedicated class

but with array you can easily access them correctly using index and some modulo operation

[winter estuary]

all i’m allowed to use is strings, int, loops, mod operator, if statements

so the coding gets very tricky

[cyan rain]

these limitations...

you sure that doesnt include arrays?

[harsh island]

💀 💀 💀

[cyan rain]

because it mentions mod operator

which would only make sense if you use arrays

[harsh island]

if (x % 4 == 3) {
  offset = offset4
}```
☠️

[cyan rain]

hell nah 💀

[harsh island]

which i highly doubt

[winter estuary]

the teacher didn’t even teach arrays

[harsh island]

bro did not cook

[rapid pasture]

you could read each char of the string though 🤔

[winter estuary]

yess that’s what i did so far

[harsh island]

so i guess if you're not using arrays you'd have to use

int offsetType = x % y;```
Where x and y are up to you partially

[cyan rain]

thats not really related to the question though

[harsh island]

then you can if statement (cause you dont have switch apparently) your way through assigning the correct offset value based on the type (type 1, 2, 3, or 4)

[winter estuary]

wait how do i type my code on here

do i just copy paste?

[spice sorrel]

Please use this format for posting code:

```java
// Example java program
int value = 5;
System.out.println(value);
```

Which results in:

// Example java program
int value = 5;
System.out.println(value);

For syntax highlighting, you have to add the name of the language after the three backticks, like ```java. Please make sure to use exactly this format, so no space between the backticks and the language name, and a newline before the code starts. If done right, the syntax highlighting will even be applied to your text as you type, before sending.

queenxorium • used /tag id: code · May 28, 2024, 7:46 PM

[winter estuary]

I don’t understand 😭

can i just copy and paste it?

[harsh island]

yeah but it wont be formatted correctly

This key 3x

At the start and end

[winter estuary]

ohh in on the phone i can’tt

[harsh island]

On android at least

[winter estuary]

this is what the like

shifting parts looks like a little

[harsh island]

im not sure why you are displaying digits only

[winter estuary]

basically

below that i also displayed letters

but i had to wrapped the letters and digits so that yk on the ASCII table

when it gets shifted it doesn’t become a strange character

[harsh island]

also I recommend java if ('0' <= c && c <= '9')
if you're not able to use Character.isDigit

[winter estuary]

okayy thank youu

[harsh island]

it'll auto cast char to ascii and vise versa

but you're saying that you want to map each character to a normal letter/number?

[winter estuary]

yess i already did that

and my program works fine

its just right now

its set up so that the user that to input a number between 1 and 9 so that

all the characters get shifted by the same number

now i have to make the input a 4 digit number

[harsh island]

i guess do some validations and then .charAt(0-3)

[winter estuary]

what are validations

[harsh island]

you probably dont have to worry about displaying any errors/preventing errors but like validating that the input was a 4 digit number

[harsh island]

ok so you stored each number in the 4 variables you mentioned earlier?