hello-mpi.c

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

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

        int rank, size, partner;
        int namelen;
        char name[MPI_MAX_PROCESSOR_NAME];

        /* initialize MPI */
        MPI_Init(&argc, &argv);

        /* how many processes */
        MPI_Comm_size(MPI_COMM_WORLD, &size);
        /* my rank */
        MPI_Comm_rank(MPI_COMM_WORLD, &rank);
        /* my name is */
        MPI_Get_processor_name(name, &namelen);

        printf("Hello world: rank %d of %d running on %s \n", rank, size, name);

        /* finalize MPI */
        MPI_Finalize();
        return 0;
}