#include <iostream>
#include <utility>
#include <thread>
#include <chrono>
#include <functional>
#include <atomic>void f1(int n)
{for (int i = 0; i < 5; ++i) {std::cout << "Thread " << n << " executing\n";std::this_thread::sleep_for(std::chrono::milliseconds(10));}
}void f2(int& n)
{for (int i = 0; i < 5; ++i) {std::cout << "Thread 2 executing\n";++n;std::this_thread::sleep_for(std::chrono::milliseconds(10));}
}int main()
{int n = 0;std::thread t1; // t1 is not a threadstd::thread t2(f1, n + 1); // pass by valuestd::thread t3(f2, std::ref(n)); // pass by referencestd::thread t4(std::move(t3)); // t4 is now running f2(). t3 is no longer a threadt2.join();t4.join();std::cout << "Final value of n is " << n << '\n';
}

#include <stdio.h>
#include <stdlib.h>#include <chrono>    // std::chrono::seconds
#include <iostream>  // std::cout
#include <thread>    // std::thread, std::this_thread::sleep_for

void thread_task(int n) {std::this_thread::sleep_for(std::chrono::seconds(n));std::cout << "hello thread "<< std::this_thread::get_id()<< " paused " << n << " seconds" << std::endl;
}/** ===  FUNCTION  =========================================================*         Name:  main*  Description:  program entry routine.* ========================================================================*/
int main(int argc, const char *argv[])
{std::thread threads[5];std::cout << "Spawning 5 threads...\n";for (int i = 0; i < 5; i++) {threads[i] = std::thread(thread_task, i + 1);}std::cout << "Done spawning threads! Now wait for them to join\n";for (auto& t: threads) {t.join();}std::cout << "All threads joined.\n";return EXIT_SUCCESS;
}  /* ----------  end of function main  ---------- */