Multithreading

async.cpp

#include <iostream>
#include <future>
#include <thread>

int someTask(){
    std::cout << "Some task\n";
}

int main(){
    // The task may or may not get executed in a separate thread.
    auto f1 = std::async(someTask);
    int ret1 = f1.get();

    // The task is guaranteed to execute in a separate thread.
    auto f2 = std::async(std::launch::async, someTask);
    int ret2 = f2.get();
}