#include <iostream.h>
class Clock //时钟类声明
{
public: //外部接口
Clock(int NewH=0,int NewM=0,int NewS=0);
void ShowTime();
void operator ++(); //前置单目运算符重载
void operator ++(int); //后置单目运算符重载
private:
int Hour,Minute,Second;
};
Clock::Clock(int NewH,int NewM,int NewS) //构造函数
{
if(0<=NewH&&NewH<24&&0<=NewM&&NewM<60&&0<=NewS&&NewS<60)
{
Hour=NewH;
Minute=NewM;
Second=NewS;
}
else
cout<<"Time error!"<<endl;
}
void Clock::ShowTime() //显示时间函数
{
cout<<Hour<<":"<<Minute<<":"<<Second<<endl;
}
void Clock::operator ++() //前置单目运算符重载函数
{
Second++;
if(Second>=60)
{
Second=Second-60;
Minute++;
if(Minute>=60)
{
Minute=Minute-60;
Hour++;
Hour=Hour%24;
}
}
cout<<"++Clock:";
}
void Clock::operator ++(int) //后置单目运算符重载
{
Second++;
if(Second>=60)
{
Second=Second-60;
Minute++;
if(Minute>=60)
{
Minute=Minute-60;
Hour++;
Hour=Hour%24;
}
}
cout<<"++Clock:";
}
void main()
{
Clock myClock(23,59,59);
cout<<"First time output:";
myClock.ShowTime();
myClock++;
myClock.ShowTime();
++myClock;
myClock.ShowTime();
}
