#include <stdio.h>
#include <stdlib.h>
#include <time.h>
int main()
{
  int i,j;
  int n = 10000, m = 10000;

  // Initialization
  double *a = new double[n];
  double *b = new double[n];
  double *c = new double[n];
  double *d = new double[n];
  double *x = new double[n];
  for (i=0; i<n; i++) a[i] = rand();
  for (i=0; i<n; i++) b[i] = rand();
  for (i=0; i<n; i++) c[i] = rand();
  for (i=0; i<n; i++) d[i] = rand();

  // Start time
  clock_t time0 = clock();

  // Main calculation
  for (j=0; j<m; j++)
    for (i=0; i<n; i++)
      x[i] = a[i] / b[i] * c[i] / d[i];

  // Finish time
  clock_t time1 = clock();

  // Output time
  double time = (double)(time1-time0)/CLOCKS_PER_SEC;
  printf("Time = %15.7f sec\n", time);

  delete[] a;
  delete[] b;
  delete[] c;
  delete[] d;
  delete[] x;
  return 0;
}