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

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

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

 if (node == 0) {
 printf("Rank 0 is present in C version of Hello World.\n");
 } else {
 printf("  Rank %d of C version says: Hello world!\n", node);
 }

 MPI_Finalize();
}