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

extern clock_t clock(void);

int main(int argc, char *argv[])
{
/* clock_t is something integral (i.e. int, unsigned int ). */
clock_t t1,t2;
/* Note that t below is double; if t was clock_t then time would be truncated */
double t;
int i;
double j;

 j=0.0;
 t=0.0;
 t1=clock();
  /* Time something here */
  for (i=0;i<=10000000;i++){
   j = j+ (double)(i*i);
  }
 t2=clock();
 if (t2 == ((clock_t) -1) ) {
  printf("Something wrong is going on! Processor time not available \n");
 }
 t = (t2-t1)/((double)CLOCKS_PER_SEC);
 printf("%d %f %f \n",i-1,j,(double)t);
}