#ifndef DATE_H
#define DATE_H
#include <iostream>
using std::ostream;
using std::istream;
class Date {
public:
   friend ostream& operator<<(ostream&,const Date&);
   friend istream& operator>>(istream&,Date&);
   bool operator==(const Date&) const;
   Date();
   Date(int m);
   Date(int m, int d);
   Date(int m, int d, int y);
   void  setMonth(int m); 
   void  setDay(int d); 
   void  setYear(int y); 
   int  getMonth(); 
   int  getDay(); 
   int  getYear(); 
   virtual ~Date(); 
private:
   int month;
   int day;
   int year;
};//end date class
Date::Date() {
     month = 1;
     day = 1;
     year = 2000;
}//end Date constructor
Date::Date(int m) {
      setMonth(m);
      day = 1;
      year = 2000;
}//end Date constructor
Date::Date(int m, int d) {
      setMonth(m);
      setDay(d);
      year = 2000;
}
Date::Date(int m, int d, int y) {
      setMonth(m);
      setDay(d);
      setYear(y);
}//end Date constructor
void Date::setMonth(int m) {
     	if (m >0 && m < 13)
	    month = m;
	else {
	    std::cerr << "invalid month " << m << std::endl;
	    month = 1;
	}
}//end of setMonth
void Date::setDay(int d) {
	switch (month) {
	    case 1: case 3: case 5: case 7: case 8: case 10: case 12:
	          if (d > 0 && d < 32)
		      day = d;
		  else {
		      std::cerr << "invalid day " << d << std::endl;
		      day = 1;
		  }
		  break;
	    case 2: //ignore leap years
	    	  if (d > 0 && d < 29)
		      day = d;
		  else {
		      std::cerr << "invalid day " << d << std::endl;
		      day = 1;
		  }
                  break;
	    case 4: case 6: case 9: case 11:
	          if (d > 0 && d < 31)
		      day = d;
		  else {
		      std::cerr << "invalid day " << d << std::endl;
		      day = 1;
		  }
		  break;
	    default:
	          day = 1;
	};//end switch
}//end setDay function
void Date::setYear(int y) {
	if( y > 0)
	   year = y;
	else {
	   std::cerr << "invalid year " << y << std::endl;
	   year = 2000;//default value
	}
}//end setYear
int Date::getMonth() {
	return month;
}//end getMonth
int Date::getDay() {
	return day;
}//end getDay
int Date::getYear() {
	return year;
}//end getYear
Date::~Date() {
}//empty, nothing to do
bool Date::operator==(const Date &otherDate) const {
	return (otherDate.month == month && 
	        otherDate.day == day &&
		otherDate.year == year);
}//end == operator
ostream& operator<<(ostream &out, const Date &d) {
	out << setfill('0')
	    << setw(2) << d.month << "/"
	    << setw(2) << d.day << "/"
	    << setw(4) << d.year;
	out << setfill(' ');
	return out;
}//end overloaded stream insertion operator
istream& operator>>(istream &in, Date &d) {
	int num;
	in >> num;
	d.setMonth(num);
	in.ignore(1);//ignore '/'
	in >> num;
	d.setDay(num);
	in.ignore(1);//ignore '/'
	in >> num;
	d.setYear(num);
	return in;
}//end overloaded stream extraction operator
#endif