1 #include <iostream>
2 #include <thread>
3 #include <array>
4 #include <Windows.h>
5 using namespace std;
6
7 void show()
8 {
9 MessageBoxA(0, "1", "1", 0);
10 }
11
12 void main()
13 {
14 //获取CPU核心的个数
15 auto n = thread::hardware_concurrency();
16 cout << "CPU核心个数:" << n << endl;
17 array<thread, 3> threads{thread(show), thread(show), thread(show)};
18
19 for (int i=0;i<3;i++)
20 {
21 //使用join后主线程等待执行完之后才结束
22 //threads[i].join();
23 //脱离主线程,主线程结束不报错,自动退出
24 threads[i].detach();
25 }
26
27 Sleep(3000);
28 }
