helloWorldOpenMP.cpp

#include <stdio.h>
#include <omp.h> // needed when using any openMP functions like omp_get_thread_num()

// compile with:  g++ -fopenmp helloWorldOpenMP.cpp -o helloWorldOpenMP 


void myFun(double *in, int id)
{
}

int main()
{
  int nThreads, myID;
  double* input;
  /* make the values of nThreads and myid private to each thread */
  #pragma omp parallel private (nThreads, myID)
  { // beginning of block
    myID = omp_get_thread_num();
    printf("Hello I am thread %i\n", myID);
    myFun(input, myID);  // do some computation on each thread
    /* only master node print the number of threads */
    if (myID == 0)
    {
      nThreads = omp_get_num_threads();
      printf("I'm the boss and control %i threads. How come they're in front of me?\n", nThreads);
    }
  } // end of block
  return 0;
}