mpi hello world

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


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

	int rank=0, size=0;

	MPI_Init(&argc, &argv);	/* starts MPI */
	MPI_Comm_rank(MPI_COMM_WORLD, &rank);	/* get current process id */
	MPI_Comm_size(MPI_COMM_WORLD, &size);
	printf("hello from proccess rank %d from size %d\n",rank,size);
	MPI_Finalize();
	return 0;
}