// MPI_Ex002.c

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

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

   MPI_Init(&argc, &argv);

   MPI_Comm_size(MPI_COMM_WORLD, &numProcs);
   MPI_Comm_rank(MPI_COMM_WORLD, &myID);

   printf("Hello world, from process %3d of %3d\n", myID, numProcs);

   MPI_Finalize();
   return 0;
}