MPI聚合通信之MPI_Bcast函数

#include "stdio.h"
#include "mpi.h"

int main(int argc,char **argv)
{
int size,rank;
static int max=20;
int h[max];

MPI_Init(&argc,&argv);
MPI_Comm_size(MPI_COMM_WORLD,&size);
MPI_Comm_rank(MPI_COMM_WORLD,&rank);

if(rank==0)
{
for(int i=0;i<max;i++)
h[i]=i+rank;
}
//sprintf(c,"highcomputing");
MPI_Bcast(h,max,MPI_INT,0,MPI_COMM_WORLD);

if(rank)
{
printf("process %d is running\n",my_rank);
for(int i=0;i<max;i++)
{
printf("%d ",h[i]);
}
printf("\n");
}
MPI_Finalize();
return 0;
}

process 1 is running
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
process 2 is running
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
process 3 is running
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19