#include <stdio.h>
#ifdef _OPENMP
  #include<omp.h>
#endif
int main() {
/*Example of a parallel loop*/
int n=7;
int a[n],t[n];
#pragma omp parallel shared(a,t,n)
{
  int tid=0; /*Dummy thread number for the case OMP is not enabled*/
  #ifdef _OPENMP
    tid=omp_get_thread_num();
  #endif
  #pragma omp for
  for (int i=0; i<n; i++) {
    a[i]=2*i;
    t[i]=tid; /*Record which thread did which iteration*/
  }
}
/*Show what was produced*/
printf("i,a(i),thread number\n");
for (int i=0; i<n; i++) {
  printf("%i %i %i \n",i,a[i],t[i]);
}
return 0;
}