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

int main(int argc, char** argv)
{
  int numtasks, rank, dest, source, rc, count, tag=1; 
  char inmsg[5], outmsg[]="hello"; 
  MPI_Status Stat; 
  MPI_Init(&argc,&argv); 

  MPI_Comm_size(MPI_COMM_WORLD, &numtasks);   
  MPI_Comm_rank(MPI_COMM_WORLD, &rank); 

  if (rank == 0) {
    dest = 1; source = 1; 
    MPI_Send(&outmsg, 5, MPI_CHAR, dest, tag, MPI_COMM_WORLD); 
    MPI_Recv(&inmsg, 5, MPI_CHAR, source, tag, MPI_COMM_WORLD, &Stat);
 } 
else if (rank == 1) {
    dest = 0; source = 0;
    MPI_Recv(&inmsg, 5, MPI_CHAR, source, tag, MPI_COMM_WORLD, &Stat); 
    MPI_Send(&outmsg, 5, MPI_CHAR, dest, tag, MPI_COMM_WORLD);
 }
 MPI_Get_count(&Stat, MPI_CHAR, &count); 
  printf("Task %d: Received %d char(s) from task %d with tag %d \n", rank, count, Stat.MPI_SOURCE,  
               Stat.MPI_TAG); 
 MPI_Finalize();
}