4 int main (int argc, char **argv) {
7 char name[MPI_MAX_PROCESSOR_NAME];
10 MPI_Init(&argc, &argv);
11 MPI_Comm_size(MPI_COMM_WORLD, &size);
12 MPI_Comm_rank(MPI_COMM_WORLD, &rank);
14 MPI_Get_processor_name(name,&len);
15 printf("rank %d is running on host %s\n", rank, name);