why C clock() returns 0

Question

I\'ve got something like this:

clock_t start, end;
start=clock();

something_else();

end=clock();
printf(\"\\nClock cycles are: %d - %d\\n\",start,end);
         


        

Answer 1

Well, do you want the time something_else() takes? Try this:

#include 
#include   
#include 
int main(void) {
    struct timeval start, end;
    long mtime, secs, usecs;    

    gettimeofday(&start, NULL);
    something_else();
    gettimeofday(&end, NULL);
    secs  = end.tv_sec  - start.tv_sec;
    usecs = end.tv_usec - start.tv_usec;
    mtime = ((secs) * 1000 + usecs/1000.0) + 0.5;
    printf("Elapsed time: %ld millisecs\n", mtime);
    return 0;
}