c++ 多线程

// thread example
#include <iostream> 
#include <thread>
using namespace std;

void foo()
{
//do stuff
}

void bar(int x)
{
//do stuff
}

int main()
{
    thread first (foo); //spawn new thread that calls foo()
    thread second (bar, 0); //spawn new thread that calls bar(0)
    cout << "main, foo and bar now execute concurrently...\n";

    first.join();
    second.join();
    cout << "foo and bar completed.\n";
    return 0;

}