mpi_simple

#include <stdio.h>
#include <mpi.h>

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

    MPI_Init (&argc, &argv);
    MPI_Comm_rank (MPI_COMM_WORLD, &rank);
    MPI_Comm_size (MPI_COMM_WORLD, &size);

    printf( "I'm process %d\n", rank );
    if (rank == 0)
    printf("Number of processes %d\n", size);

    MPI_Finalize();

    return 0;
}