关于子线程被打断执行的问题

#include <iostream>
#include <windows.h>
#include <boost/thread/thread.hpp>
using namespace std;
void print()
{
  while (!boost::this_thread::interruption_requested())
  {
    std::cout << "111" << std::endl;
    Sleep(1000);
  }
}
void main()
{
  boost::thread th = boost::thread(&print);
  getchar();
  th.interrupt();
  th.join();
  while (1);
  return ;
}