运算符重载实例

运算符重载

#include

using namespace std;

class Time{

public:

Time(int newH,int newM,int newS); //有参构造

Time(){ //无参构造

hour=0;

minute=0;

second=0;}

int getH(){return hour;}int getM(){return minute;}

int getS(){return second;}

void getslot(){cin>>hour>>minute>>second;}

void getoldtime(){cin>>hour>>minute>>second;}

void gettime() const;

Time& operator+();

int hour,minute,second;

};

Time::Time(int hour/*=0*/,int minute/*=0*/,int second/*=0*/){

if(0<=hour&&hour<24&&0<=minute&&minute<60&&0<=second&&second<60)

{this->hour=hour;

this->minute=minute;

this->second=second;

}else cout<<"Time error!"<

}

void Time::gettime()const{

cout<

}

Time&Time::operator+()

{cout<<"timeslot>>";Time timeslot;timeslot.getslot();cout<<"New time>>";

second=second+timeslot.second;if(second>=60){second-=60;minute=minute+1;

if(minute>=60){minute-=60;

hour=(hour+1)%24;

}}

minute=minute+timeslot.minute; if(minute>=60){minute-=60;

hour=(hour+1)%24;}

hour=hour+timeslot.hour;if(hour>=24){hour=(hour+1)%24;

}

return *this;

}

int main(){

Time oldclock;

cout<<"Set time>>";

oldclock.getoldtime();

if(oldclock.hour>=24||oldclock.minute>=60||oldclock.second>=60) cout<<"Time error!";

else {cout<<"old Time>>";

oldclock.gettime();

(+oldclock).gettime();}

return 0;

}