打卡4.13

#include <iostream>

using namespace std;

class Time

{public:

       Time ();

       friend void display();

private:

       int hour,minu,sec;};

Time::Time()

{      hour=11;

       minu=11;

       sec=11;}

void display()

{Time t;

cout<<t.hour<<":"<<t.minu<<":"<<t.sec<<endl;}

void main()

{

       display();

}

#include <iostream>

using namespace std;

class Date;

class Time

{public:

       Time(int,int,int);

       void display(Date &);

 private:int hour,minu,sec;};

class Date

{public:

       Date(int,int,int);

       friend void Time::display(Date &);

 private:int year,month,day;};

Time::Time(int h, int m, int s)

{hour=h; minu=m; sec=s;}

Date::Date(int y,int m,int d)

{year=y;  month=m;     day=d;}

void Time::display(Date &d1)

{cout<<d1.year<<"."<<d1.month<<"."<<d1.day<<endl;

  cout<<hour<<":"<<minu<<":"<<sec<<endl;}

void main()

{      Time t1(23,31,24);

       Date d1(2014,2,3);

       t1.display(d1);

}