openmp_example.cpp

// run using g++-mp-4.7 -fopenmp -std=c++11 openmp_example.cpp -o openmp_example 
// on my mac. Not sure about everyone elses, but my g++ version doesn't have openp
// so I have to use that one

#include <iostream>
using namespace std;
 
#include <omp.h>
 
int main(int argc, char *argv[])
{
  int th_id, nthreads;
  #pragma omp parallel private(th_id) shared(nthreads)
  {
    th_id = omp_get_thread_num();
    #pragma omp critical
    {
      cout << "Hello World from thread " << th_id << '\n';
    }
    #pragma omp barrier
 
    #pragma omp master
    {
      nthreads = omp_get_num_threads();
      cout << "There are " << nthreads << " threads" << '\n';
    }
  }
 
  return 0;
}

stupid program - got stuck at g++ for so long