C++9 주 프로젝트 2-시간 클래스 의 연산 자 를 다시 불 러 옵 니 다.

수업 첫 페이지 주소:http://blog.csdn.net/sxhelijian/article/details/7910565,이번 주 제목 링크:http://blog.csdn.net/sxhelijian/article/details/8841620
【프로젝트 2-Time 류】8 주차 프로젝트 2 를 연결 하여 Time 류 의<와>연산 자 를 다시 불 러 오고 시간의 입 출력 을 실현 하 며 원래 프로그램 에서 연산 결과 표시 방식 을 바 꾸 어 프로그램 이 더욱 자 연 스 럽 게 읽 을 수 있 도록 합 니 다.
참고 해답:

#include <iostream>
using namespace std;
class CTime
{
private:
	unsigned short int hour;    //  
	unsigned short int minute;  //  
	unsigned short int second;  //  
public:
	CTime(int h=0,int m=0,int s=0);
	void setTime(int h,int m,int s);

	//         
	friend istream &operator>>(istream &in,CTime &t);
	friend ostream &operator<<(ostream &out,CTime t);
	//     (  )   
	bool operator > (CTime &t);
	bool operator < (CTime &t);
	bool operator >= (CTime &t);
	bool operator <= (CTime &t);
	bool operator == (CTime &t);
	bool operator != (CTime &t);
	//        
	CTime operator+(CTime &c);//  c     、 、     ， t1(8,20,25),t2(11,20,50)，t1+t2 :41:15
	CTime operator-(CTime &c);//  +  
	CTime operator+(int s);//  s     
	CTime operator-(int s);//  s     
	//        
	CTime operator++(int);//  ++，   
	CTime operator++();//  ++，   
	CTime operator--(int);//  --，   
	CTime operator--();//  --，   
	//        
	CTime operator+=(CTime &c);
	CTime operator-=(CTime &c);
	CTime operator+=(int s);//  s     
	CTime operator-=(int s);//  s     
};

//    
CTime::CTime(int h,int m,int s)
{
	hour=h;
	minute=m;
	second=s;
}
//     
void CTime::setTime(int h,int m,int s)
{
	hour=h;
	minute=m;
	second=s;
}

//        >>
istream &operator>>(istream &in,CTime &t)
{
	char ch1,ch2;
	while(1)
	{
		cout<<"     (hh:mm:ss) ";
		cin>>t.hour>>ch1>>t.minute>>ch2>>t.second;
		if (ch1==':' && ch2==':')
			if (t.hour>-1 && t.hour<24 && t.minute>-1 && t.minute<60 && t.second>-1 && t.second<60) break;
		cerr<<"       !      
";
	}
	return cin;
}

//        <<
ostream &operator<<(ostream &out,CTime t)
{
	out<<t.hour<<':'<<t.minute<<':'<<t.second;
	return out;
}


//        
bool CTime::operator > (CTime &t) //     t1>t2
{
	if (hour>t.hour) return true;
	if (hour<t.hour) return false;
	if (minute>t.minute) return true;
	if (minute<t.minute) return false;
	if (second>t.second) return true;
	return false;
}

bool CTime::operator < (CTime &t)//     t1<t2
{
	if (hour<t.hour) return true;
	if (hour>t.hour) return false;
	if (minute<t.minute) return true;
	if (minute>t.minute) return false;
	if (second<t.second) return true;
	return false;
}

bool CTime::operator == (CTime &t)//     t1==t2
{
	if (*this<t || *this>t) return false;
	return true;
}

bool CTime::operator != (CTime &t) //     t1!=t2
{
	if (*this==t) return false;
	return true;
}

bool CTime::operator >= (CTime &t)//     t1>=t2
{
	if (*this<t) return false;
	return true;
}

bool CTime::operator <= (CTime &t) //     t1<=t2
{
	if (*this>t) return false;
	return true;
}

//        
//       ,   c     、 、     ， t1(8,20,25),t2(11,20,50)，t1+t2 :41:15
CTime CTime::operator + (CTime &t)
{

	int h,m,s;
	s=second+t.second;
	m=minute+t.minute;
	h=hour+t.hour;
	if (s>59)
	{
		s-=60;
		m++;
	}
	if (m>59)
	{
		m-=60;
		h++;
	}
	while (h>23) h-=24;
	CTime t0(h,m,s);
	return t0;
}

//  s     
CTime CTime::operator+(int s)
{
	int ss=s%60;
	int mm=(s/60)%60;
	int hh=s/3600;
	CTime t0(hh,mm,ss);
	return *this+t0;
}

//       
CTime CTime::operator - (CTime &t)
{
	int h,m,s;
	s=second-t.second;
	m=minute-t.minute;
	h=hour-t.hour;
	if (s<0)
	{
		s+=60;
		m--;
	}
	if (m<0)
	{
		m+=60;
		h--;
	}
	while (h<0) h+=24;
	CTime t0(h,m,s);
	return t0;
}

//  s     
CTime CTime::operator-(int s)
{
	int ss=s%60;
	int mm=(s/60)%60;
	int hh=s/3600;
	CTime t0(hh,mm,ss);
	return *this-t0;
}

//        
CTime CTime::operator++(int)//  ++，   
{
	CTime t=*this;
	*this=*this+1;
	return t;
}

CTime CTime::operator++()//  ++，   
{
	*this=*this+1;
	return *this;
}

CTime CTime::operator--(int)//  --，   
{
	CTime t=*this;
	*this=*this-1;
	return t;
}

CTime CTime::operator--()//  --，   
{
	*this=*this-1;
	return *this;
}

//        
CTime CTime::operator+=(CTime &c)
{
	*this=*this+c;
	return *this;
}
CTime CTime::operator-=(CTime &c)
{
	*this=*this-c;
	return *this;
}
CTime CTime::operator+=(int s)//  s     
{
	*this=*this+s;
	return *this;
}
CTime CTime::operator-=(int s)//  s     
{
	*this=*this-s;
	return *this;
}

int main()
{
	CTime t1,t2,t;

	cout<<"t1 ：";
	cin>>t1;
	cout<<"t2 ：";
	cin>>t2;
	cout<<"          ：
";
	if (t1>t2) cout<<"t1>t2"<<endl;
	if (t1<t2) cout<<"t1<t2"<<endl;
	if (t1==t2) cout<<"t1＝t2"<<endl;
	if (t1!=t2) cout<<"t1≠t2"<<endl;
	if (t1>=t2) cout<<"t1≥t2"<<endl;
	if (t1<=t2) cout<<"t1≤t2"<<endl;
	cout<<endl;
	cout<<"t1= "<<t1<<endl;
	cout<<"t2= "<<t2<<endl;

	cout<<"t=t1++"<<endl;
	t=t1++;
	cout<<"t= "<<t<<"    t1= "<<t1<<endl;

	cout<<"t=++t1"<<endl;
	t=++t1;
	cout<<"t= "<<t<<"    t1= "<<t1<<endl;

	cout<<"t1+t2= "<<t1+t2<<endl;
	cout<<"t1-t2= "<<t1-t2<<endl;
	cout<<"t1+2000= "<<t1+2000<<endl;
	cout<<"t1-5000= "<<t1-5000<<endl;

	return 0;
}