C++9週目(春)プロジェクト2-Time類

授業の最初のページは以下の通りですhttp://blog.csdn.net/sxhelijian/article/details/11890759を選択します.
【項目2】8週目の項目2に基づいて(1)時間オブジェクトに対する自己増加と自己減算の演算子を定義する.

	//        
	CTime operator++(int);//  ++，   
	CTime operator++();//  ++，   ，           
	CTime operator--( int);//  --，   
	CTime operator--();//  --，   

(2)Timeクラスの「和」演算子を再負荷し、時間の入出力を実現し、元のプログラムでの演算結果の表示方式を改造して、プログラムをより自然に読めます.
参考解答:

#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;
}

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