#include <iostream.h>
#include <mpi.h>
using namespace std;

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

    MPI_Init(&argc, &argv);
    MPI_Comm_rank(MPI_COMM_WORLD, &my_rank);

    if (my_rank == MASTER)
    {
        int buf = 0;
        MPI_Recv(&buf, sizeof(buf), MPI_CHAR,
            MPI_ANY_SOURCE, MPI_ANY_TAG, MPI_COMM_WORLD);
        cout << "Master received " << buf << endl;
    }
    else
    {
        int forty_two = 42;
        MPI_Send(&forty_two, sizeof(forty_two), MPI_CHAR,
            MASTER, 42, MPI_COMM_WORLD);
    }

    MPI_Finalize();

    return 0;
}