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

int main(int argc, char * argv[]) {
     int i;
     clock_t e;
     clock_t s = clock();

     for(i = 0; i < 100000000; i++);

     e = clock();

     printf("We started at %d and ended at %d.", s, e);

     return 0;
}

We started at 0 and ended at 0.