3 int main(int argc, char *argv[])
6 char name[MPI_MAX_PROCESSOR_NAME];
9 MPI_Comm_size(MPI_COMM_WORLD,&nprocs);
10 MPI_Comm_rank(MPI_COMM_WORLD,&rank);
11 MPI_Get_processor_name(name, &len);
12 printf("Hello, world. I am %d of %d on %s\n", rank, nprocs, name);fflush(stdout);