#include <thread>

#include <cstdio>

#include <utility>

#include <iostream>

void print(int x) {

    printf("%d\n", x);

}

int main() {

    std::thread t1(print, );

    std::thread t2(print, );

    // 获得线程ID

    std::thread::id t1_id = t1.get_id();

    std::thread::id t2_id = t2.get_id();

    std::cout << t1_id << " " << t2_id << std::endl;    

    /*

     * 阻塞当前线程，直至 *this 所标识的线程完成其执行。

     * *this 所标识的线程的完成同步于从 join() 的成功返回。

     */

    t1.join();

    t2.join();

    return ;

}