#include
#include
#include“mpi.h“
#include“stdio.h“
#include
const?int?rows?=?8;?/*the?rows?of?matrix*/
const?int?cols?=?8;?/*the?cols?of?matrix*/
int?main（int?argc?char?**argv）

{
int?ijkmyidnumprocsanstag;
double??A[rows][cols]B[cols]X[rows]AB[rows][cols+1];
int?masterpro;
double?buf[cols+1];
double?starttimeendtime;
double?tmptotaltime;
srand（（unsigned?int）time（NULL））;
MPI_Status?status;
masterpro?=?0;
MPI_Init（&argc&argv）;
MPI_Comm_rank（MPI_COMM_WORLD&myid）;
MPI_Comm_size（MPI_COMM_WORLD&numprocs）;
if?（myid==0）
????{
??????starttime?=?MPI_Wtime（）;
??????for（i=0;i?????????{
????????????B[i]=rand（）%20;
????????????for（j=0;j?????????????????{
????????????????????A[j][i]=rand（）%20;
???????????????