C++

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ways to stop a running clock

Mar 18, 2010 at 12:30pm
loveless (56)
hi everyone
i wonder, is there anyway to stop an unfinite loop of a running time

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#include<iostream>
#include<windows.h>

using namespace std;

void gotime(int&, int&, int&);

int main()
{
    int h, m, s;

    h = m = s = 0;

    while(true)
    {
        Sleep(1000);
        gotime(h, m, s);
    }
}

void gotime(int& h, int& m, int& s)
{
    if (s >= 60)
    {
        s = 0;
        m++;
    }

    if (m >= 60)
    {
        m = 0;
        h++;
    }

    if (h >= 24)
        h = 0;

    s++;

    system("cls");

    if(h < 10)
        cout << "0" << h << ":";

    else
        cout << h << ":";

    if(m < 10)
        cout << "0" << m << ":";

    else
        cout << m << ":";

    if(s < 10)
        cout << "0" << s << endl;

    else
        cout << s << endl;
}
Edit & run on cpp.sh
Mar 18, 2010 at 12:48pm
imi (426)
Use the new CRAY supercomputer. It can calculate the infinite loop in 10 minutes!


No, joking. use "break" inside the loop. If you want to cancel from within "gottime", you can use the return value of gottime:

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...
    while(true)
    {
        Sleep(1000);
        if (gottime(h,m,s))
            break;
    }

void gotime(int& h, int& m, int& s)
{
...
    if (h == 23 && m == 23 && s == 23)
        return true; // time of the illuminati! Break immediately!
...
    return false;
}


Ciao, Imi.
Last edited on Mar 18, 2010 at 12:48pm
Mar 18, 2010 at 12:54pm
loveless (56)
....then what about if the user wants to stop the time when the user hit anykey in the keyboard, is that possible to stop the time??
Mar 18, 2010 at 1:04pm
Duthomhas (13173)
Mar 18, 2010 at 1:17pm
loveless (56)
thanks Duoas,
i had a question about the code below, what does this function actually does?

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bool iskeypressed( unsigned timeout_ms = 0 )
  {
  return WaitForSingleObject(
    GetStdHandle( STD_INPUT_HANDLE ),
    timeout_ms
    ) == WAIT_OBJECT_0;
  }
Mar 18, 2010 at 3:04pm
Duthomhas (13173)
It does exactly what I said it does in the thread you got it from. Try running the example program to see it working.
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