Problem with "time.h" library

[JeanCrack]

Hello everybody i want to execute a code which gives the duration of a running program by using the library "time.h" particularly the clock() function.
The problem is that i am not getting the right result and the program looks like:

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

int main(void)
{
float end;
clock_t start=clock();
.
.
.
.
end = (clock()-start)/CLOCKS_PER_SEC;
printf("%f",end);
return 0;
}

I have got 0.000000 as Output.
Thanks in advance for help.

[donbock]

What do you expect the expression (clock()-start)%CLOCKS_PER_SEC to mean?
And why are you using modulo division?

You don't protect yourself from the possibility that this feature is not available. That is, you don't check if clock returned (clock_t)-1.

[JeanCrack]

It is supposed to be (clock()-start)/CLOCKS_PER_SEC instead of (clock()-start)%CLOCKS_PER_SEC, it has been a mistake and excuse me.
So what i want by using that expression is to get the elapsed time between the beginning of the program and the end in second.

[donbock]

All of the terms in the expression are integers so integer math is used, and then the integer result is cast to a float. Suppose your program takes less than a second to run -- then the result is zero.

[JeanCrack]

Thank you ,it works perfectly.