#include <omp.h> // load Open-MP library
#include <stdio.h>
#include <stdlib.h>

int main() {
  int N = 5;
  int num;

#pragma omp parallel for private(num) // start Open-MP section
  // here the program (1 thread) is split into multiple threads
  // each thread has its own copy of i (loop) and num (private)
  // all threads share N (by default, because defined outside)
  for (int i = 0; i < N; i++) {
    num = omp_get_thread_num();
    printf("Thread %d does iteration %d\n", num, i);
  }

  return 0;
}