C++11/14 线程中使用Lambda函数的方法

#include <iostream>
#include <thread>

int main()
{
  std::thread t([]()
  {
    std::cout << "thread function\n";
  });
  std::cout << "main thread\n";
  t.join();
  return 0;
}

#include <iostream>
#include <thread>
#include <vector>
#include <algorithm>

int main()
{
  // vector 容器存储线程
  std::vector<std::thread> workers;
  for (int i = 0; i < 5; i++) 
  {
    workers.push_back(std::thread([]() 
    {
      std::cout << "thread function\n";
    }));
  }
  std::cout << "main thread\n";

  // 通过 for_each 循环每一个线程
  // 第三个参数赋值一个task任务
  // 符号'[]'会告诉编译器我们正在用一个匿名函数
  // lambda函数将它的参数作为线程的引用t
  // 然后一个一个的join
  std::for_each(workers.begin(), workers.end(), [](std::thread &t;) 
  {
    t.join();
  });

  return 0;
}

for (int i = 0; i < 5; i++) 
{
  workers.push_back(std::thread([i]() 
  {
    std::cout << "thread function " << i << "\n";
  }));
}