#include <thread>

1 hardware_concurrency();

2 join();

 1 #include <iostream>
 2 #include <thread>
 3 #include <windows.h>
 4
 5 using namespace std;
 6
 7 void msg()
 8 {
 9     MessageBoxA(0, "12345", "678910", 0);//弹出对话框
10 }
11
12 void main()
13 {
14     auto n = thread::hardware_concurrency();
15
16     std::cout << n << std::endl;
17
18     std::cout << "thread=" << std::this_thread::get_id() << std::endl;//获取当前线程编号
19
20     thread thread1(msg);//创建多线程
21     thread thread2(msg);
22     thread1.join();//开始执行，同时弹出2个对话框
23     thread2.join();
24
25     system("pause");
26 }

数组存放进程

 1 #include <iostream>
 2 #include <thread>
 3 #include <vector>
 4 #include <windows.h>
 5
 6 using namespace std;
 7
 8 void msg()
 9 {
10     MessageBoxA(0, "12345", "678910", 0);//弹出对话框
11 }
12
13 void msgA(int num)
14 {
15     std::cout << std::this_thread::get_id() << " num=" << num << std::endl;
16     MessageBoxA(0, "12345", "678910", 0);//弹出对话框
17 }
18
19 void main()
20 {
21     vector<thread *>threads;
22
23     //for (int i = 0; i < 10; i++)
24     //{
25     //    threads.push_back(new thread(msg));//创建线程
26     //}
27
28     for (int i = 0; i < 10; i++)
29     {
30         threads.push_back(new thread(msgA, i));//创建线程
31     }
32
33     for (auto th : threads)
34     {
35         th->join();
36     }
37
38     system("pause");
39 }