#include<stdio.h>
#include<omp.h>
#include<sys/time.h>

int main(int argc, char *argv[])
{
 int a[100000];
 int i,sum;
 struct timeval start, end;
 gettimeofday(&start, NULL);

//Your time consuming code here 
 
  gettimeofday(&end, NULL);
  delta = ((end.tv_sec  - start.tv_sec) * 1000000u +
           end.tv_usec - start.tv_usec) / 1.e6;

  printf("time=%12.10f\n",delta);
}