#include <thread>

1 detach

脱离当前主线程，自由执行，乱序;

2 join()

等待模式，执行完再执行下一个

3 std::this_thread::get_id()

获取当前线程编号

4 std::thread::hardware_concurrency()

检测CPU有多少个核心

1 detach

脱离当前主线程，自由执行，乱序;

2 join()

等待模式，执行完再执行下一个

 #include <iostream>
 #include <thread>

 void run(int num)
 {
     std::cout << "hello world" << num << std::endl;
 }

 void main()
 {
     std::thread *p[];

     for (int i = ; i < ; i++)
     {
         p[i] = new std::thread(run, i);//循环创建线程
         //p[i]->join();//等待模式，执行完再执行下一个
         p[i]->detach();//脱离当前主线程，自由执行，乱序;
     }

     system("pause");
 }

1 join()

等待模式，执行完再执行下一个

2 std::this_thread::get_id()

获取当前线程编号

3 std::thread::hardware_concurrency()

检测CPU有多少个核心

 #include <iostream>
 #include <thread>
 #include <windows.h>

 void msg()
 {
     MessageBoxA(, "对话框内容", "对话框标题", );//弹出对话框
 }

 void main()
 {
     auto n = std::thread::hardware_concurrency();//检测CPU有多少个核心
     std::cout << n << std::endl;

     std::cout << "thread=" << std::this_thread::get_id() << std::endl;//获取当前线程编号

     std::thread thread1(msg);//创建多线程
     std::thread thread2(msg);

     thread1.join();//开始执行，同时弹出2个对话框
     thread2.join();

     system("pause");
 }

std::vector<std::thread *>threads;//创建一个数组，数组的元素数据类型是std::thread *

threads.push_back(new std::thread(msg));//创建线程，并添加到数组

 #include <iostream>
 #include <thread>
 #include <vector>
 #include <windows.h>

 void msg()
 {
     MessageBoxA(, "对话框内容", "对话框标题", );//弹出对话框
 }

 void main()
 {
     std::vector<std::thread *>threads;//创建一个数组，数组的元素数据类型是std::thread *

     for (int i = ; i < ; i++)
     {
         threads.push_back(new std::thread(msg));//创建线程，并添加到数组
     }

     for (auto th : threads)//遍历数组
     {
         th->join();//执行数组中的线程
     }

     system("pause");
 }

threads.push_back(new std::thread(msgA, i));//创建线程，并添加到数组，传入参数i，进行通信

 #include <iostream>
 #include <thread>
 #include <vector>
 #include <windows.h>

 void msgA(int num)
 {
     std::cout << std::this_thread::get_id() << " num=" << num << std::endl;//获取当前线程编号
     MessageBoxA(, "对话框内容", "对话框标题", );//弹出对话框
 }

 void main()
 {
     std::vector<std::thread *>threads;//创建一个数组，数组的元素数据类型是std::thread *

     for (int i = ; i < ; i++)
     {
         threads.push_back(new std::thread(msgA, i));//创建线程，并添加到数组，传入参数i，进行通信
     }

     for (auto th : threads)//遍历数组
     {
         th->join();//执行数组中的线程
     }

     system("pause");
 }