issue with delays | Together C & C++ | Page 1

gray notch Nov 14, 2022, 9:14 AM

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Hello, I'm using the chrono and thread libraries to create a delay. However, whenever I run the program, nothing happened. What could be my issue (code in thread)

covert vaultBOT Nov 14, 2022, 9:14 AM

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gray notch Nov 14, 2022, 9:15 AM

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#include <iostream>
#include <random>
#include <chrono>
#include <thread>
#include <windows.h>
#include <mmsystem.h>
#include <string>
using namespace std;
using namespace std::chrono_literals;
using namespace std::chrono;
using namespace std::this_thread;

//setting up
char test1;
//date
int p = 1;
int dmy = 1;
int day = 1;
int month = 7;
int year = 1908;

void timerr()
{
    while( year > 0 )
    {
    sleep_for(seconds(p));
    ++day;
    if( day == 31 && month == 1 ) //jan
    {
        ++month;
        day = 0;
    }
    else if( day == 29 && month == 2 && year == 1908 || year == 1912 ) //feb, leapy
    {
        ++month;
        day = 0;
    }
    else if( day == 28 && month == 2 && year != 1908 || year != 1912 ) //feb, reg
    {
        ++month;
        day = 0;
    }
    else if( day == 31 && month == 3 ) //mar
    {
        ++month;
        day = 0;
    }
    else if( day == 30 && month == 4 ) //apr
    {
        ++month;
        day = 0;
    }
    else if( day == 31 && month == 5 ) //may
    {
        ++month;
        day = 0;
    }
    else if( day == 30 && month == 6 ) //jun
    {
        ++month;
        day = 0;
    }
    else if( day == 31 && month == 7 ) //jul
    {
        ++month;
        day = 0;
    }
    else if( day == 31 && month == 8 ) //aug
    {
        ++month;
        day = 0;
    }
    else if( day == 30 && month == 9 ) //sep
    {
        ++month;
        day = 0;
    }
    else if( day == 31 && month == 10 ) //oct
    {
        ++month;
        day = 0;
    }
    else if( day == 30 && month == 11 ) //nov
    {
        ++month;
        day = 0;
    }
    else //dec
    {
        month = 12;
        day = 0;
        ++year;
    }
    }
}

int main() 
{
    timerr();
    sleep_for(seconds(p));
    cout << "pause working";
    cin >> test1;
}```

thorn carbon Nov 14, 2022, 9:37 AM

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the issue is that for year to have a negative value (which only then will make it exit your loop), you'd have to wait literal years

sleek steppe Nov 14, 2022, 9:37 AM

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endless loop? ```c++
int year = 1908;

void timerr()
{
while( year > 0 )

thorn carbon Nov 14, 2022, 9:38 AM

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not exactly endless but for all practical purposes it might as well be

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also that if cascade is not doing what you think it is

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right now you're executing the single else block at the end every time you run around the loop

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if it were working as intended however, the amount of time you'd have to wait before seeing any output would score in the hundreds of years lol

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I just ran the numbers in fact

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with your current faulty if cascade, which makes your program quicker than it really should, it would take an approximate 68 years before you see any output at all

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that's the time it takes to increment year by one every second until it overflows to negative values

sleek steppe Nov 14, 2022, 9:44 AM

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numeric_limits<int>::max() + 1

thorn carbon Nov 14, 2022, 9:45 AM

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if your if cascade was working as intended, it would take about 365 seconds, give or take, before year is incremented by one

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then we're looking at a mere 24855 years before you see any output

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this much time ago we were still a species of cavemen and would still be for more than 15000 years onwards

thorn carbon Nov 14, 2022, 9:48 AM

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thorn carbon then we're looking at a mere 24855 years before you see any output

that's also just about the earth's axial precession period

gray notch Nov 14, 2022, 1:06 PM

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while( year < 1915 )

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I tried using this instead but it still doesn't work

thorn carbon Nov 14, 2022, 1:13 PM

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gray notch `while( year < 1915 )`

have you let it run for over 10 seconds using that condition?

gray notch Nov 14, 2022, 1:14 PM

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yes

thorn carbon Nov 14, 2022, 1:15 PM

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have you saved the file and compiled it before you ran it again?

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(stupid question but I'm very serious)

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(you have no idea how many beginners forget to save their changes and then compile the file again)

gray notch Nov 14, 2022, 1:17 PM

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yeah I just did that

thorn carbon Nov 14, 2022, 1:18 PM

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and it still doesn't work? then you have to debug

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what's your IDE

gray notch Nov 14, 2022, 1:18 PM

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should I use breakpoints?

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visual studio

thorn carbon Nov 14, 2022, 1:19 PM

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gray notch should I use breakpoints?

sure, use anything you like

gray notch Nov 14, 2022, 2:32 PM

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huh, weird, it runs if I comment out the timerr function

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so there must be an error in that function

thorn carbon Nov 14, 2022, 2:52 PM

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gray notch huh, weird, it runs if I comment out the `timerr` function

well of course it does, what you're witnessing otherwise is that this function never returns because of faulty logic which I pointed out earlier

gray notch Nov 14, 2022, 3:15 PM

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ok, fixed it!

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ty all

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!solved

#issue with delays