#include<stdio.h>			// for input/output
#include<mpi.h>				//for mpi routines

#define BUFSIZE 10			//The size of the messege being passed

main( int argc, char** argv)
{
	int rank;				//the rank of this process
	float sendbuf[BUFSIZE], recvbuf[BUFSIZE];
	int tag = 0;
	MPI_Status status;		//not important here
	MPI_Init(&argc, &argv);	//Initializing mpi
	MPI_Comm_rank(MPI_COMM_WORLD, &rank);	//Getting my rank

	if( rank == 0 )
	{ 
		printf("Hello world! I am proc 0, waiting for message from proc 1\n");
		//recieve from proc 1
		MPI_Recv(recvbuf, BUFSIZE, MPI_FLOAT, 1, tag,
		MPI_COMM_WORLD, &status);

		//send to the proc 1
		MPI_Send(sendbuf, BUFSIZE, MPI_FLOAT, 1, tag,
		MPI_COMM_WORLD);
	}
	else if( rank == 1)
	{
		printf("Hello world! I am proc 1, waiting for message from proc 0\n");
		//recieve from the proc 0
		MPI_Recv(recvbuf, BUFSIZE, MPI_FLOAT, 0, tag,
		MPI_COMM_WORLD, &status);

		//send to the proc 0
		MPI_Send(sendbuf, BUFSIZE, MPI_FLOAT, 0, tag,
		MPI_COMM_WORLD);
	}
	printf("Proc %d finished!!\n", rank);
	MPI_Finalize();
	return 0;
}