#include <stdio.h>
#include "mpi.h"
#include "math.h"
int main( int argc, char **argv)
{
     int i, numtasks, rank, sum;
     MPI_Init(&argc, &argv); MPI_Comm_rank(MPI_COMM_WORLD,&rank);
     MPI_Comm_size(MPI_COMM_WORLD,&numtasks);
     if (rank ==1)sum=7; 
     MPI_Bcast (&sum,1,MPI_INT,1, MPI_COMM_WORLD);
     printf("sum = %d on rank = %d \n",sum,rank);
     MPI_Finalize();
}