多线程编程 C

Question

I have to execute this code manually and figure the output, I tried it out and could not find out what am missing, here's the code:

#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>

void *thread_function(void *arg) {
    printf("Hello World :) \n");
    exit(EXIT_SUCCESS);
}

int main(void) {

    pthread_t mythread;

    if(pthread_create(&mythread, NULL, thread_function, NULL)) {
        fprintf(stderr, "Failure 1?\n");
        exit(EXIT_FAILURE);
    }

    printf("I have to wait ? \n");

    if (pthread_join(mythread, NULL)){
        fprintf(stderr, "Failure 2 ?");
        exit(EXIT_FAILURE);
    }

    printf("Goodbye Cruel World :(\n");
    return 0;
}

The expected output is:

I have to wait ?
Hello World :)
Goodbye Cruel World :(

The output I got:

I have to wait ?
Hello World :)

Why the code skipped the last print?

Answer 1

The call to exit in the thread will terminate the process before it has a chance to output the "Goodbye" message. If you want to terminate a thread, use pthread_exit , not exit .