hello.cpp

#include "mpi.h"

int main(int argc, char **argv) {
	MPI_Init(&argc, &argv);

	int rank, size;
	MPI_Comm_rank(MPI_COMM_WORLD, &rank);
	MPI_Comm_size(MPI_COMM_WORLD, &size);

	printf("Hello world from rank: %2d / %d\n", rank, size);

	MPI_Finalize();
	return 0;
}