xt9-11.cpp

最新版谭浩强《c++语言程序设计》所有习题的原代码

#include <iostream>
using namespace std;
class Time;
class Date
 {public:
   Date(int,int,int);
   friend Time;
  private:
   int month;
   int day;
   int year;
 };
 
Date::Date(int m,int d,int y):month(m),day(d),year(y){ }

class Time
 {public:
   Time(int,int,int);
   void display(const Date &);
  private:
   int hour;
   int minute;
   int sec;
 };
 
Time::Time(int h,int m,int s):hour(h),minute(m),sec(s){ }
 
void Time::display(const Date &d)
 {
  cout<<d.month<<"/"<<d.day<<"/"<<d.year<<endl;
  cout<<hour<<":"<<minute<<":"<<sec<<endl;
 }
 
   
int main()
{
 Time t1(10,13,56);
 Date d1(12,25,2004);
 t1.display(d1);
 return 0;
}