// a class to represent a calendar date
class date
{

     private int day;
     private int month;
     private int year;
   
     public date(int m, int d, int y)
     {  day=d; month=m; year=y; }

    // function to return number of days in each month
    private int daysinmonth(int m) throws Exception
    {
       if (m<1 || m>12) throw new Exception("invalid month");
       int answer = 31;
       if (m==4 || m==6 || m==9 || m==11) answer = 30;
       if (m==2)
	   {
	       if (year % 4 ==0) answer = 29; else answer = 28;
	   }
       return answer;
    }

    public void nextday()  throws Exception
    {
	day++;
	int dinm = daysinmonth(month);
	if (day > dinm) // inc month:
	    {
		day = 1;
		month++;
	    }
	if (month>12)
	    {
		month = 1;
		year++;
	    }
    }  // nextday

    public String toString()
    {
	return month+"/"+day+"/"+year;
    }

    public boolean before(date B)
    {
      if (year < B.year) return true;
      if (year == B.year && month<B.month) return true;
      if (year==B.year && month==B.month && day<B.day) return true;
      return false;
    }

} // class date


public class calendar
{
  public static void main(String[] args)
    {
      date today = new date(9,8,2005);
      date last = new date(12,31,2005);
      date leap = new date(2,28,2004);

      try {    // try-catch box	

        today.nextday();
        last.nextday();
        leap.nextday();

        System.out.println(today.before(last)); 


        // constructing an array of objects 
        date[] schedule = new date[3];
	schedule[0]  = new date(9,13,2005);
	schedule[1]= last;
	schedule[2] = leap;
	for(int i=0;i<schedule.length;i++) schedule[i].nextday();

      }  catch (Exception e) 
          {
	      System.out.println(e);
	      System.exit(1);   // terminates java
          }

      System.out.println(today.toString());
      System.out.println(last);
      System.out.println(leap);
    }
}