#include <iostream.h>
class  Date
{
	int Year, Month, Day;
public:
	Date( )                    //重載構造函數 1
	{	Year=2003; Month=1; Day=1;  }
	Date(int y)                 //重載構造函數 2
	{	Year=y; Month=1; Day=1;  }
	Date(int y, int m)            //重載構造函數 3
	{	Year=y; Month=m; Day=1; 	}
	Date(int y, int m, int d)       //重載構造函數 4
	{	Year=y; Month=m; Day=d; 	}
	void ShowDate( )
	{	cout <<Year<<'.'<<Month<<'.'<<Day<<endl; 	}
};