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

* FILE: omp_workshare2.c

* DESCRIPTION:

*   OpenMP Example - Sections Work-sharing - C/C++ Version

*   In this example, the OpenMP SECTION directive is used to assign

*   different array operations to threads that execute a SECTION. Each

*   thread receives its own copy of the result array to work with.

* AUTHOR: Blaise Barney  5/99

* LAST REVISED: 04/06/05

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

#include <omp.h>

#include <stdio.h>

#include <stdlib.h>

#define N     50

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

int i, nthreads, tid;

float a[N], b[N], c[N];

/* Some initializations */

for (i=0; i<N; i++)

  a[i] = b[i] = i * 1.0;

#pragma omp parallel shared(a,b,nthreads) private(c,i,tid)

  {

  tid = omp_get_thread_num();

  if (tid == 0)

    {

    nthreads = omp_get_num_threads();

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

    }

  printf("Thread %d starting...\n",tid);

  #pragma omp sections nowait

    {

    #pragma omp section

      {

      printf("Thread %d doing section 1\n",tid);

      for (i=0; i<N; i++)

        {

        c[i] = a[i] + b[i];

        printf("Thread %d: c[%d]= %f\n",tid,i,c[i]);

        }

      }

    #pragma omp section

      {

      printf("Thread %d doing section 2\n",tid);

      for (i=0; i<N; i++)

        {

        c[i] = a[i] * b[i];

        printf("Thread %d: c[%d]= %f\n",tid,i,c[i]);

        }

      }

    }  /* end of sections */

    printf("Thread %d done.\n",tid);

  }  /* end of parallel section */

  return 0;

}