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/******************************************************************************

* FILE: omp_hello.c

* DESCRIPTION:

*   OpenMP Example - Hello World - C/C++ Version

*   In this simple example, the master thread forks a parallel region.

*   All threads in the team obtain their unique thread number and print it.

*   The master thread only prints the total number of threads.  Two OpenMP

*   library routines are used to obtain the number of threads and each

*   thread's number.

* AUTHOR: Blaise Barney  5/99

* LAST REVISED: 04/06/05

******************************************************************************/

#include <omp.h>

#include <stdio.h>

#include <stdlib.h>

int main (int argc, char *argv[]) {

int nthreads, tid;

/* Fork a team of threads giving them their own copies of variables */

#pragma omp parallel private(nthreads, tid)

  {

  /* Obtain thread number */

  tid = omp_get_thread_num();

  printf("Hello World from thread = %d\n", tid);

  /* Only master thread does this */

  if (tid == 0)

    {

    nthreads = omp_get_num_threads();

    printf("Number of threads = %d\n", nthreads);

    }

  }  /* All threads join master thread and disband */

  return 0;

}