MPI打印来自进程的问候，wmpiexec启用多个进程就无法实现
MPI代码如下。
#include "stdafx.h"
#include
#include
#include"mpi.h"
const int MAX_STRING = 100;
int main(void) {
char greeting[MAX_STRING];
int comm_sz;
int my_rank;
MPI_Init(NULL, NULL);
MPI_Comm_size(MPI_COMM_WORLD, &comm_sz);
MPI_Comm_rank(MPI_COMM_WORLD, &my_rank);
if (my_rank != 0) {
sprintf(greeting, "if Greeting from process %d of %d!", my_rank, comm_sz);
MPI_Send(greeting, strlen(greeting) + 1, MPI_CHAR, 0, 0, MPI_COMM_WORLD);
}
else {
printf("else Greetings from process %d of %d!\n", my_rank, comm_sz);
for (int q = 1; q<comm_sz; q++) {
MPI_Recv(greeting, MAX_STRING, MPI_CHAR, 0, 0, MPI_COMM_WORLD, MPI_STATUS_IGNORE);
printf("%s\n", greeting);
}
}
MPI_Finalize();
return 0;
}
启用一个进程结果。
启用多个进程结果。