//安全状态的判断函数
int safe(int location) {
// 若状态安全则返回true
if ((goat(location) == cabbage(location)) && (goat(location) != farmer(location)) ) // 羊吃白菜
return 0;
if ((goat(location) == wolf(location)) && (goat(location) != farmer(location))) // 狼吃羊
return 0;
return 1; // 其他状态是安全的
}
int main(int argc, char **argv ) {
int i, myid, numprocs;
double area, a, b;
MPI_Init(&argc, &argv);
MPI_Comm_size(MPI_COMM_WORLD, &numprocs);
MPI_Comm_rank(MPI_COMM_WORLD, &myid);
if (numprocs < 2) {
fprintf(stderr, "ERROR: Must have at least 2 processes to run\n");
MPI_Finalize();
exit(1);
}
if (myid == 0) { // Farmer
// init counters
tasks_per_process = (int *) malloc(sizeof(int)*(numprocs));
for (i=0; i<numprocs; i++) {
tasks_per_process[i]=0;
}
}
if (myid == 0) { // Farmer
area = farmer(numprocs);
} else { //Workers
worker(myid);
}
if (myid == 0) {
fprintf(stdout, "Area=%lf\n", area);
fprintf(stdout, "\nTasks Per Process\n");
for (i=0; i<numprocs; i++) {
fprintf(stdout, "%d\t", i);
}
fprintf(stdout, "\n");
for (i=0; i<numprocs; i++) {
fprintf(stdout, "%d\t", tasks_per_process[i]);
}
fprintf(stdout, "\n");
free(tasks_per_process);
}
MPI_Finalize();
return 0;
}
