#include <iostream>
#include <stdexcept>

#include "queue.h"
#include "queue.h" // test inclusion guard

void try_pop_empty(Queue& q)
{
  try
  {
    q.pop();
  }
  catch (std::exception& e)
  {
    std::cerr << e.what() << std::endl;
  }
}

int main()
{
  Queue q;
  std::string name;

  try_pop_empty(q);
  
  while ( std::cin >> name )
  {
    q.push(name);
  }
  
  while ( ! q.empty() )
  {
    std::cout << q.pop() << ' ';
  }

  try_pop_empty(q);

  for (int i{0}; i < 5; ++i)
  {
    q.push("The devil is in the detail.");
    q.pop();
  }
  
  try_pop_empty(q);
  
  const Queue cq;
  cq.empty();
  
  return 0;
}