console_main_loop_with_user_interupt_exit.cxx

#include <thread>
#include <chrono>
#include <string>
#include <iostream>

int main()
{
  std::cerr << "<press enter to exit>\n";

  bool to_continue = true;

  auto main_loop_thread = std::thread([&]()
  {
    size_t n = 0;
    while(to_continue)
    {
      std::this_thread::sleep_for(std::chrono::seconds(1));
      std::cerr << n++ << ' ';
    }
  });

  std::string buffer;
  std::getline(std::cin, buffer);
  to_continue = false;
  main_loop_thread.join();
}