title: Can we deregister an exit handler that has been registered with atexit()
body: <p>is it possible to unregister an exit handler function???</p>
  
  <pre><code>void exit_handler_1()
  {
      printf("in first exit handler\n");
  }
  
  int main()
  {
      if(atexit(exit_handler_1())
      {
          perror("error");
      }
      return 0;
  }
  </code></pre>