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

int main(void)
{
    clock_t t;
    int i;
    
    for (i=0; i<0x1fffffff; i++) { }
    
    t = clock();
    
    printf("%ld = %g[sec]\n", t, ((float)t / CLOCKS_PER_SEC));
    
    return 0;
}