# include <stdlib.h>
# include <stdio.h>

# include "mpi.h"

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

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

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

/******************************************************************************/
/*
  Purpose:

    MAIN is the main program for HELLO.

  Licensing:

    This code is distributed under the GNU LGPL license.

*/
{
  int id;
  int ierr;
  int p_num;
/*
  Initialize MPI.
*/
  ierr = MPI_Init ( &argc, &argv );
/*
  Get the number of processes.
*/
  ierr = MPI_Comm_size ( MPI_COMM_WORLD, &p_num );
/*
  Get the individual process ID.
*/
  ierr = MPI_Comm_rank ( MPI_COMM_WORLD, &id );
/*
  Process 0 prints an introductory message.
*/
  if ( id == 0 ) 
  {
    printf ( "\n" );
    printf ( "HELLO - Master process:\n" );
    printf ( "  C version\n" );
    printf ( "  An MPI example program.\n" );
    printf ( "\n" );
    printf ( "  The number of processes is %d.\n", p_num );
    printf ( "\n" );
  }
/*
  Every process prints a hello.
*/
  printf ( "  Hello from process %d\n", id );
/*
  Shut down MPI.
*/
  ierr = MPI_Finalize ( );

  return 0;
}