For an approximation result, you can use something like the example below:
(note: just a quick and dirty example, no error checking, etc)

#include <stdio.h>
#include <time.h>

void wait ( int sec ) {
int a =0;
clock_t end_wait;
end_wait = clock () + sec * CLK_TCK;
while (clock() < end_wait) {

// Your useless calculations.
a++;
}
printf (“%i\n”, a);
}

void waitspeedup ( int sec, int speedupfactor ) {
int num,a = 0;
num = sec / speedupfactor;
printf (“The new wait time is: %i\n”, num);
clock_t end_wait;
end_wait = clock () + num * CLK_TCK;
while (clock() < end_wait) {

// Your useless calculations
a++;
}
// The fake result (because of speedup factor)
printf (“%i\n”, a);
// Multiply result with speedupfactor to get an approximation
// of the actual results.
printf (“%i\n”, a*speedupfactor);
}

int main () {
printf (“Waiting.1….\n”);
// Wait approx. 12 seconds
wait(12);
printf (“Waiting.2….\n”);
// Wait approx. 12 / 2 = 6 seconds
waitspeedup(12,2);
// There are 86400 seconds in a day
// do something like this 86400/1200=72 sec.
return 0;
}

Hope that this is useful for you. Good luck!

I was going through your site and found it quite interesting.

I have a question…..

I would like to measure 24 hrs on my machine without waiting for 24 hrs…… is it possible ? (By making some useless calculation in loop).

Could you provide me with an example.

If this is your question, then the simple answer is +1.

The hard answer is: you have to take the number of days of the month your into account. You also have to make sure it’s not a leap year (see note.) So your calculation get harder.

Note: a leap year does not strictly fall on every fourth year. If a year is divisible by 4, then it is a leap year, but if that year is divisible by 100, then it is not a leap year. However, if the year is also divisible by 400, then it is a leap year.

The leap year calculation can be done like so:


int leap_year (int year)
{
if(year% 4==0 && year%100 != 0 || year%400==0)
return TRUE;
else return FALSE;
}


The best thing you can do is to create a calendar function for yourself. If I have some time tomorrow I will post a example.

following date:???????