日期类的自增和自减运算符的重载1.txt

学C++的同学是不是遇到麻烦了

#include  <iostream.h>
class    Date
{
   public: 
       Date(){}
       Date(int  y,int  m,int  d){year=y;  month=m;  day=d;}	              void   Print()                  
       {
             cout<<year<<","<<month<<","<<day<<endl;
       }
      Date   operator ++();
      Date   operator --();
    private:
         int   year ,  month,  day;
};
Date  Date::operator ++()
{
	day++;
	return  *this;
}
Date  Date::operator --()
{
	day--;
	return  *this;
}

void  main()
{
   Date  today(2003,10,13),tomorrow,yesterday;
   
   cout<<"今天是：";      
   today.Print();  
   cout<<endl;
   
   cout<<"明天是：";      
   tomorrow=++today;
   tomorrow.Print();  
   cout<<endl;
   
   cout<<"昨天是：";
   today=--tomorrow;
   yesterday=--today;
   yesterday.Print();
   cout<<endl;

}