第九周 任務一

#include <iostream>

using namespace std;

class CTime      
{      
private:      
    unsigned short int hour;    // 時      
    unsigned short int minute;  // 分      
    unsigned short int second;  // 秒 
	char unknown; //':'的符號

public:      
    CTime(int h=0,int m=0,int s=0);      
	//    void setTime(int h,int m,int s);           
    //比較運算符(二目)的重載      
    bool operator > (CTime &t);      
    bool operator < (CTime &t);      
    bool operator >= (CTime &t);      
    bool operator <= (CTime &t);      
    bool operator == (CTime &t);      
    bool operator != (CTime &t);      
    //二目運算符的重載      
    CTime operator+(CTime &c);  //返回c所規定的時、分、秒後的時間，例t1(8,20,25),t2(11,20,50)，t1+t2爲:41:15      
    CTime operator-(CTime &c);//對照+理解      
    CTime operator+(int s);//返回s秒後的時間      
    CTime operator-(int s);//返回s秒前的時間      
    //一目運算符的重載      
    CTime operator++(int);//後置++，下一秒      
    CTime operator++();//前置++，下一秒      
    CTime operator--(int);//後置--，前一秒      
    CTime operator--();//前置--，前一秒      
    //賦值運算符的重載           
    CTime operator+=(CTime &c);      
    CTime operator-=(CTime &c);      
    CTime operator+=(int s);//返回s秒後的時間      
    CTime operator-=(int s);//返回s秒前的時間 
	//重載流插入運算符“<<”
    friend ostream& operator << (ostream&,CTime&);
	//重載流提取運算符“>>”
	friend istream& operator >> (istream&,CTime&);
};
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;      
}    */
//下面實現所有的運算符重載代碼。      
//爲簡化編程，請注意通過調用已有函數，利用好各函數之間的關係      
//比較運算符(二目)的重載         
ostream& operator << (ostream&output,CTime&c)
{ 
	output<<c.hour <<":"<<c.minute <<":"<<c.second <<endl; 
	return output;
}   
istream& operator >> (istream& input,CTime & c)
{ 
	input>>c.hour>>c.unknown >>c.minute>>c.unknown >>c.second;
	return input;
}

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

bool CTime::operator != (CTime &t)      
{      
    CTime t1;      
    t1.hour =hour;      
    t1.minute =minute ;      
    t1.second =second ;      
    if(t1==t)      
        return false;      
    return true;      
}      
//二目運算符的重載      
CTime CTime::operator+(CTime &c)//返回c所規定的時、分、秒後的時間，例t1(8,20,25),t2(11,20,50)，t1+t2爲:41:15      
{      
    CTime c2;    
    int time;    
    
    time = (hour * 3600 + minute * 60 + second) + (c.hour * 3600 + c.minute * 60 + c.second);    
    
    c2.hour = time / 3600;    
    
    time = time % 3600;    
    
    c2.minute = time / 60;    
    
    time = time % 60;    
    
    c2.second = time;    
    
    return c2;    
}      
CTime CTime::operator-(CTime &c)//對照+理解      
{      
    CTime c2;     
	
    int time;      
	
    time = (hour * 3600 + minute * 60 + second) - (c.hour * 3600 + c.minute * 60 + c.second);      
	
    c2.hour = time / 3600;      
	
    time = time % 3600;      
	
    c2.minute = time / 60;      
	
    time = time % 60;      
	
    c2.second = time;      
	
    return c2;      
}      
CTime CTime::operator+(int s)//返回s秒後的時間      
{      
    int time = hour * 3600 + minute * 60 + second + s;    
    
    hour = time / 3600;    
    
    time = time % 3600;    
    
    minute = time / 60;    
    
    time = time % 60;    
    
    second = time;      
    
    return (*this);  
}      
CTime CTime::operator-(int s)//返回s秒前的時間      
{      
    int time = hour * 3600 + minute * 60 + second;      
	
    time = time - s;      
	
    hour = time / 3600;      
	
    time = time % 3600;      
	
    minute = time / 60;      
	
    time = time % 60;      
	
    second = time;      
	
    return (*this);     
	
}      
//一目運算符的重載      
CTime CTime::operator++(int)//後置++，下一秒      
{      
    CTime temp(*this);      
    second++;      
    if(second>=60)      
    {       
        second-=60;      
        ++minute;      
    }      
    return temp;      
}      
CTime CTime::operator++()//前置++，下一秒      
{      
    if(++second>=60)      
    {      
        second-=60;      
        ++minute;      
    }      
	
    return *this;      
}      
CTime CTime::operator--(int)//後置--，前一秒      
{      
    CTime temp(*this);      
    second--;      
    if(second<0)      
    {       
        second=59;      
        --minute;      
    }      
    return temp;      
}      
CTime CTime::operator--()//前置--，前一秒      
{      
    if(--second<0)      
    {      
        second=59;      
        --minute;      
    }      
    return *this;      
}      
//賦值運算符的重載           
CTime CTime::operator+=(CTime &c)      
{      
    CTime t1,t;      
    t1.hour =hour;      
    t1.minute =minute ;      
    t1.second =second ;      
    t=t1+c;      
    hour=t.hour ;      
    minute=t.minute ;      
    second=t.second ;      
    return t;      
}      
CTime CTime::operator-=(CTime &c)      
{      
    *this=*this-c;  
    return *this;      
	
}      
CTime CTime::operator+=(int s)//返回s秒後的時間      
{      
    CTime t1,t;      
    t1.hour =hour;      
    t1.minute =minute ;      
    t1.second =second ;      
    t=t1+s;      
    hour=t.hour ;      
    minute=t.minute ;      
    second=t.second ;      
    return t;      
}      
CTime CTime::operator-=(int s)//返回s秒前的時間      
{      
    *this=*this-s;  
    return *this;  
}      
void main()      
{      
    CTime t1,t2,t;      
    int n; 
	cout<<"請輸入t1的時間：（以aa:bb:cc的格式輸入）"<<endl;
	cin>>t1;
	cout<<"請輸入t2的時間：（以aa:bb:cc的格式輸入）"<<endl;
	cin>>t2;
    cout<<"t1爲：";      
    cout<<t1;      
    cout<<"t2爲：";      
    cout<<t2;      
    cout<<"下面比較兩個時間大小：\n";      
    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+t2的時間爲：";      
    t=t1+t2;      
    cout<<t;      
    cout<<"t2-t1的時間爲：";      
    t=t2-t1;      
    cout<<t;      
    cout<<endl;      
    cout<<"請輸入您想增加的秒數："<<endl;      
    cin>>n;      
    t=t1+n;      
    cout<<"增加"<<n<<"秒後的時間爲：";      
    cout<<t;      
    t=t1-n;      
    cout<<"增加"<<n<<"秒前的時間爲：";      
    cout<<t;      
    cout<<endl;      
    cout<<"對t1後置++,結果爲：";      
    t=t1++;      
    cout<<t;      
    cout<<"運算結束後，t1的值爲：";      
    cout<<t1;      
    cout<<endl;      
    cout<<"對t1前置++,結果爲：";      
    t=++t1;      
    cout<<t;      
    cout<<"運算結束後，t1的值爲：";      
    cout<<t1;      
    cout<<endl;      
    cout<<"對t1後置--,結果爲：";      
    t=t1--;      
    cout<<t;      
    cout<<"運算結束後，t1的值爲：";      
    cout<<t1;      
    cout<<endl;      
    cout<<"對t1前置--,結果爲：";      
    t=--t1;      
    cout<<t;      
    cout<<"運算結束後，t1的值爲：";      
    cout<<t1;      
    cout<<endl;      
    cout<<"運算t1+=t2的結果爲：";      
    t1+=t2;      
    cout<<t1;      
    cout<<endl;      
    cout<<"此時t1的值爲：";      
    cout<<t1;      
    cout<<"此時t2的值爲：";      
    cout<<t2;      
    cout<<endl;      
    cout<<"運算t1-=t2的結果爲：";      
    t1-=t2;      
    cout<<t1;      
    cout<<"此時t1的值爲：";      
    cout<<t1;      
    cout<<"此時t2的值爲：";      
    cout<<t2;      
    cout<<endl;      
    cout<<"請輸入您想增加的秒數："<<endl;      
    cin>>n;      
    t1+=n;      
    cout<<"t1增加"<<n<<"秒後的時間爲：";      
    cout<<t1;      
    cout<<"t2增加"<<n<<"秒前的時間爲：";      
    t2-=n;      
    cout<<t2;      
    cout<<endl;          
}