#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 容器存儲線程
  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";

  // 通過 for_each 循環(huán)每一個(gè)線程
  // 第三個(gè)參數(shù)賦值一個(gè)task任務(wù)
  // 符號'[]'會告訴編譯器我們正在用一個(gè)匿名函數(shù)
  // lambda函數(shù)將它的參數(shù)作為線程的引用t
  // 然后一個(gè)一個(gè)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";
  }));
}