#include "mpi.h"
#include <stdio.h> 
#define SIZE 4 

int main(int argc, char** argv)
{
  int numtasks, rank, sendcount, recvcount, source; 
  float sendbuf[SIZE][SIZE] = { {1.0, 2.0, 3.0, 4.0}, {5.0, 6.0, 7.0, 8.0}, {9.0, 10.0, 11.0, 12.0}, {13.0, 14.0, 15.0, 16.0} }; 
  float recvbuf[SIZE]; 
  
  MPI_Init(&argc,&argv); 
  MPI_Comm_rank(MPI_COMM_WORLD, &rank); 
  MPI_Comm_size(MPI_COMM_WORLD, &numtasks); 

  if (numtasks == SIZE) { 
    source = 1; 
    sendcount = SIZE; 
    recvcount = SIZE; 
    MPI_Scatter(sendbuf,sendcount,MPI_FLOAT,recvbuf,recvcount,MPI_FLOAT,source,MPI_COMM_WORLD); 
    printf("rank= %d Results: %f %f %f %f\n",rank,recvbuf[0],recvbuf[1],recvbuf[2],recvbuf[3]);
  } 
 else 
 printf("Must specify %d processors. Terminating.\n",SIZE); 

MPI_Finalize();
}