C++继承应用实例--日期和时间

#include<iostream>
#include<cstring>
#include<cstdio>
using namespace std;
typedef char string80[80];
class Date{
	public:
		Date(){
			
		}
		Date(int y,int m,int d){
			SetDate(y,m,d);
		}
		void SetDate(int y,int m,int d){
			Year=y;Month=m;Day=d;
		}
		void GetStringDate(string80 &Date){
			sprintf(Date,"%d/%d/%d",Year,Month,Day);
		}
	protected:
		int Year,Month,Day;
};
class Time{
	public:
		Time(){
		}
		Time(int h,int m,int s){
			SetTime(h,m,s);
		}
		void SetTime(int h,int m,int s){
			Hours=h;Minutes=m;Seconds=s;
		}
		void GetStringTime(string80 &Time){
			sprintf(Time,"%d:%d:%d",Hours,Minutes,Seconds);
		}
	protected:
		int Hours,Minutes,Seconds;
};
class TimeDate:public Date,public Time{
	public:
		TimeDate():Date(){
		}
		TimeDate(int y,int mo,int d,int h,int mi,int s):
			Date(y,mo,d),Time(h,mi,s){
		}
		void GetStringDT(string80 &DTstr){
			sprintf(DTstr,"%d/%d%d;%d:%d:%d",Year,Month,Day,Hours,Minutes,Seconds);
		} 
};
int main(){
	TimeDate data1,data2(1998,8,12,12,46,10);
	string80 DemoStr;
	data1.SetDate(1998,12,7);
	data1.SetTime(1,1,1);
	data1.GetStringDT(DemoStr);
	cout<<DemoStr<<endl;
	data1.GetStringDate(DemoStr);
	cout<<DemoStr<<endl;
	data1.GetStringTime(DemoStr);
	cout<<DemoStr<<endl;
	data2.GetStringDT(DemoStr);
	cout<<DemoStr<<endl;
}