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


void * print_a(void *);
void * print_b(void *);

int main(){

    pthread_t t0;
    pthread_t t1;

    // 创建线程A
    if(pthread_create(&t0, NULL, print_a, NULL) == -1){
        puts("fail to create pthread t0");
        exit(1);
    }

    if(pthread_create(&t1, NULL, print_b, NULL) == -1){
        puts("fail to create pthread t1");
        exit(1);
    }

    // 等待线程结束
    void * result;
    if(pthread_join(t0, &result) == -1){
        puts("fail to recollect t0");
        exit(1);
    }

    if(pthread_join(t1, &result) == -1){
        puts("fail to recollect t1");
        exit(1);
    }


    return 0;
}


// 线程A 方法
void * print_a(void *a){
    for(int i = 0;i < 10; i++){
        sleep(1);
        puts("aa");
    }
    return NULL;

}

// 线程B 方法
void * print_b(void *b){
    for(int i=0;i<20;i++){
        sleep(1);
        puts("bb");
    }
    return NULL;
}

aa
bb
aa
aa
bb
...