【TOJ 5247】C++实验：时间和日期类

#include<iostream>
using namespace std;
class CDate{
    protected:
        int y,m,d;
    public:
        CDate();
        CDate(int y,int m,int d):y(y),m(m),d(d){} 
        void Print()
        {
            cout<<y<<"-"<<m<<"-"<<d<<endl;
        } 
};
class CTime{
    protected:
        int hh,mm,ss;
    public:
    CTime();
    CTime(int hh,int mm,int ss):hh(hh),mm(mm),ss(ss){}
    void Print()
    {
        cout<<hh<<":"<<mm<<":"<<ss<<endl;
    }
};
class CDateTime:public CDate,public CTime{
    public:
        CDateTime();
        CDateTime(int y,int m,int d,int hh,int mm,int ss):CDate(y,m,d),CTime(hh,mm,ss){}
        void Print()
        {
            cout<<CDate::y<<"-"<<CDate::m<<"-"<<CDate::d<<" "<<CTime::hh<<":"<<CTime::mm<<":"<<CTime::ss<<endl;
        }
};
int main()
{
    int y, m, d, hh, mm, ss;
    while(cin>>y>>m>>d>>hh>>mm>>ss)
    {
        CDateTime dt(y,m,d,hh,mm,ss);
        dt.Print();
        ((CDate)dt).Print();
        ((CTime)dt).Print();
    }
    return 0;
}