是的，你应该加入的线程。 加入一个线程仅仅意味着等待，直到线程终止。换句话说，你会怎么做。

Yes, you should "join" the threads. "Joining" a thread simply means waiting until the thread has terminated. In other words, you would do

pthread_join(tid1, NULL);
pthread_join(tid2, NULL);

要等到这两个线程都终止。

to wait until both threads have terminated.

编辑：如果你有一个子线程，这反过来，创建了一个孙子线程怎么办？作为一项规则，谁创建线程应该等待它终止（加入的话）。因此，在这种情况下，子线程会叫phtread_join孙子线程，而主线程会召唤加盟子线程上。

What to do if you have a child thread which, in turn, creates a "grandchild" thread? As a rule, whoever created the thread should wait for it to terminate ("join" it). So in this scenario, the child thread would call phtread_join on the grandchild thread, and the main thread would call join on the child thread.