11.5.cpp

这是C++的一部分练习程序!对初学者有一定的帮助作用。

#include <iostream.h>
class Date
{
  public:
	Date(int y,int m,int d)
	{
		year=y;
		month=m;
		day=d;
	}
	friend ostream& operator <<(ostream &stream,Date &date);
	friend istream& operator >>(istream &stream,Date &date);
  private:
	int year,month,day;
};
ostream& operator <<(ostream &stream,Date &date)
{
	stream<<date.year<<'/'<<date.month<<'/'<<date.day<<endl;
	return stream;
}
istream& operator >>(istream &stream,Date &date)
{
	stream>>date.year>>date.month>>date.day;
	return stream;
}
void main()
{
	Date d(2005,7,11);
	cout<<"Current date is "<<d;
	cout<<"Enter new date: ";
	cin>>d;
	cout<<"New date is "<<d;
}