Question

设计一个日期类，Date,要求：包含年（year）月（month）日（day）私有数据成员。

还有，包含构造函数，重载输出运算符“<<”与冲在输入运算符“>>”。
计科系的，都想找答案是不？
没戏的，还是自己做吧。

Answer 1

//给你写了一个,你看看吧
class Date{
private:
int year;
int month;
int day;
public:
Date():year(1990),month(1),day(1){};
friend ostream & operator <<(ostream &os,Date &date);
friend istream & operator >>(istream &is,Date &date);
};
ostream &operator <<(ostream &os,Date &date)
{
os<<date.year<<"-"<<date.month<<"-"<<date.day;
return os;
}
istream &operator>>(istream &is,Date &date)
{
is>>date.year>>date.month>>date.day;
if(date.year>9999||date.year<0||date.month>12||date.month<1||date.day>31||date.day<0)
cout<<"error"<<endl;
return is;
}

Answer 2

class Date
{
public:
Date(UINT y,UINT m,UINT d);
~Date();
void operator<<(Date);
protected:
UINT year;
UINT month;
UINT day;
}
Date::Date()
{
year=y;
month=m;
day=d;
}
void Date::operator<<(Date date)
{
cout<< date.year<<date.month<<date.day<<endl;
}