//  BirthdaysOnSunday.java  Copyright (c) 2006 Kari Laitinen

//  http://www.naturalprogramming.com

//  2006-02-15   File created.
//  2006-02-15   Last modification.

//  When this program is compiled, Date.java and DateDistance.java
//  must be in the same folder (directory) together with this file.

//  Solution to exercise 11-4.

import java.util.* ;

class BirthdaysOnSunday
{
   public static void main( String[] not_in_use )
   {
      Scanner keyboard = new Scanner( System.in ) ;

      System.out.print( "\n Type in your date of birth as DD.MM.YYYY"
                     +  "\n or MM/DD/YYYY. Use four digits for the year"
                     +  "\n and two digits for the month and day:  " ) ;

      String  date_of_birth_as_string   =  keyboard.nextLine() ;

      Date date_of_birth  =  new  Date( date_of_birth_as_string ) ;

      int  future_year  =  2006 ;

      int  number_of_dates_printed  =  0  ;

      while ( number_of_dates_printed  <  5 )
      {
         Date  future_birthday  =  new  Date( date_of_birth.day(),
                                              date_of_birth.month(),
                                              future_year ) ;

         if ( future_birthday.index_for_day_of_week()  ==  6 )
         {
            System.out.print( "\n   The birthday "  +  future_birthday 
                    +   " is "  +  future_birthday.get_day_of_week()   ) ;

            number_of_dates_printed  ++ ;
         }

         future_year  ++ ;
      }
   }
}