// A Second MPI C Program
//p. 38 Tutorial slides
#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("Hello world! I am %d of %d\n",rank,size);
    MPI_Finalize();
    return 0;
}

/*
To check connections: recon -v lamhosts

lamboot -v lamhosts

LAM 6.5.6/MPI 2 C++/ROMIO - University of Notre Dame

Executing hboot on n0 (helium.tjhsst.edu - 1 CPU)...
Executing hboot on n1 (sulfur.tjhsst.edu - 1 CPU)...
Executing hboot on n2 (phosphorus.tjhsst.edu - 1 CPU)...
Executing hboot on n3 (magnesium.tjhsst.edu - 1 CPU)...
topology done

mpicc -o simple2Mpi simple2Mpi.c
mpirun N simple2Mpi
Hello world! I am 1 of 4
Hello world! I am 2 of 4
Hello world! I am 3 of 4
Hello world! I am 0 of 4

lamclean
lamhalt
*/