ParallelProgram-WhereAmI.c

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

int main(int argc, char** argv) {
    int myrank, nprocs;

    MPI_Init(&argc, &argv);
    MPI_Comm_size(MPI_COMM_WORLD, &nprocs);
    MPI_Comm_rank(MPI_COMM_WORLD, &myrank);

    printf("Hello from processor %d of %d\n", myrank, nprocs);
    printHostName();

    MPI_Finalize();
    return 0;
}

void printHostName(){
    char hostname[1024];
    gethostname(hostname, 1024);
    puts(hostname);

    return;
}