/* time_cpu.c    see if  C  time.h   clock() is OK */
#include <stdio.h>
#include <time.h>
int main()
{

  int i;
  double now;
  double next;

  printf("Should be wall time, 5 second intervals \n");
  now = (double)clock()/(double)CLOCKS_PER_SEC;
  next = now+5.0;

  for(i=0; i<90;)
  {
    now = (double)clock()/(double)CLOCKS_PER_SEC;
    if(now >= next) 
    {
      printf("%d\n",i);
      i=i+5;
      next=next+5.0;
    }    
  } 
  return 0;
}