#include <iostream>
#include <thread>

using namespace std ;

void thread_function()
{
    cout << "thread function\n";
}

int main()
{
    thread t1( &thread_function );   // t1 starts running
    cout << "main thread\n";
    t1.join();   // main thread waits for the thread t1 to finish


    return 0;
}