#include <stdexcept>
#include <iostream>
#include <limits>

#include "date.h"

using namespace std;

const int DAYS_LATER{10000};

int main()
{
  int y,m,d;
  char c;
  bool good_date{false};

  cout << "Enter a date: ";
  
  while ( ! good_date )
    try
    {
      cin >> y >> c >> m >> c >> d;
      Date date{y, m, d};
      good_date = true;
  
      for ( int i{0}; i < DAYS_LATER; ++i )
      {
        date.next_date();
      }
      
      cout << DAYS_LATER << " days later: " << date;
    }
    catch (exception& e)
    {
      cerr << "Invalid date, enter another date: ";
      cin.clear();
      cin.ignore(numeric_limits<streamsize>::max(), '\n');
    }
  
  cout << endl;
  
  return 0;
}