第九周實驗報告（任務2）

程序頭部註釋開始
* 程序的版權和版本聲明部分
* Copyright (c) 2011, 煙臺大學計算機學院學生
* All rights reserved.
* 文件名稱： 時間類運算符重載  
* 作    者：     郭廣建                       
* 完成日期：  2012年    04  月  22    日
* 版 本 號：  1.0

源程序：

#include <iostream>

using namespace std;

class CTime
{
private:
    unsigned short int hour;    // 時

    unsigned short int minute;  // 分

    unsigned short int second;  // 秒
public:
    CTime(int h=0,int m=0,int s=0);

    void setTime(int h,int m,int s);

	//輸入、輸出符重載
	friend istream& operator>>(istream &input,CTime &t);

	friend ostream& operator<<(ostream &output,CTime &t);
    //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
};
istream& operator>>(istream &input,CTime &t)
{
	char c, d;

	while(1)
	{
		cout << "請按hh:mm:ss的格式輸入時間" <<endl;

	    input >> t.hour >> c >>t.minute >> d >>t.second ;

	    if(t.hour > 24 || t.minute > 60|| t.second > 60)
		{
		    continue;
		}
		if(c != ':' || d != ':')
		{
			continue;
		}
		else 
			break;
	}
	return input;
}
ostream& operator<<(ostream &output,CTime &t)
{
	output << t.hour << ':' <<t.minute << ':' << t.second;

	return output;
}

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;
}
bool CTime::operator > (CTime &t)
{
	if(hour > t.hour)  return true;

    if(minute > t.minute) return true;

	if(second > t.second) return true;

	return false;
}
bool CTime::operator < (CTime &t)
{	
	if(hour < t.hour)  return true;

    if(minute < t.minute) return true;

	if(second < t.second) return true;

	return false;

	}
bool CTime::operator >= (CTime &t)
{	
	if(hour < t.hour)  return false;

    if(minute < t.minute) return false;

	if(second < t.second) return false;

	return true;

}
bool CTime::operator <= (CTime &t)
{	
	if(hour > t.hour)  return false;

    if(minute > t.minute) return false;

	if(second > t.second) return false;

	return true;
}
bool CTime::operator == (CTime &t)
{	
	return(hour==t.hour?true:false && minute==t.minute?true:false &&second==t.second?true:false);
}
bool CTime::operator != (CTime &t)
{	
	return(hour!=t.hour?true:false || minute!=t.minute?true:false ||second!=t.second?true:false);
}
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
{
	int s1, s2, s;

	s1 = hour *3600 + minute * 60 + second;

	s2 = c.hour*3600 + c.minute *60 + c.second;

	s = s1 + s2;
	if(s > 24*3600)
	{
		s -= 24*3600;
	}
	return CTime(s/3600, (s%3600)/60, (s%3600)%60);
}
CTime CTime::operator-(CTime &c)//對照+理解
{
	int s1, s2, s;

	s1 = hour *3600 + minute * 60 + second;

	s2 = c.hour*3600 + c.minute *60 + c.second;

	s = s1 - s2;

	if(s < 0)
	{
		s += 24*3600;
	}
	return CTime(s/3600, (s%3600)/60, (s%3600)%60);
}
CTime CTime::operator+(int s)//返回s秒後的時間
{
	int s1, s2;

	s1 = hour *3600 + minute * 60 + second;

	s2 = s1 + s;

	return CTime(s2/3600, (s2%3600)/60, (s2%3600)%60);
}
CTime CTime::operator-(int s)//返回s秒前的時間
{
	int s1, s2;

	s1 = hour *3600 + minute * 60 + second;

	s2 = s1 - s;

	if(s2 < 0)
	{
		s += 24*3600;
	}
	return CTime(s2/3600, (s2%3600)/60, (s2%3600)%60);
}
CTime CTime::operator++(int)//後置++，下一秒
{
	CTime temp(*this);

	second++;

	if(second >= 60)
	{
		second = 0;

		++minute;
	}
	return temp;
}
CTime CTime::operator++()//前置++，下一秒
{
	    if(++second >= 60)
	{
		second = 0;

		++minute;
	}
	return *this;
}

CTime CTime::operator--(int)//後置--，前一秒
{
	CTime temp(*this);

	second--;

	if(second <= 60)
	{
		second = 60;

		--minute;
	}
	return temp;
}
CTime CTime::operator--()//前置--，前一秒
{
	    if(--second <= 0)
	{
		second = 60;

		--minute;
	}
	return *this;
}
CTime CTime::operator+=(CTime &c)
{
	int s1, s2, s;

	s1 = hour *3600 + minute * 60 + second;

	s2 = c.hour*3600 + c.minute *60 + c.second;

	s = s1 + s2;

	hour = s/3600;

	minute = (s%3600)/60;

	second = (s%3600)%60;

	return (hour, minute, second);
}
CTime CTime::operator-=(CTime &c)
{
	int s1, s2, s;

	s1 = hour *3600 + minute * 60 + second;

	s2 = c.hour*3600 + c.minute *60 + c.second;

	s = s1 - s2;

	if(s < 0)
	{
		s += 24*3600;
	}
	hour = s/3600;

	minute = (s%3600)/60;

	second = (s%3600)%60;

	return (hour, minute, second);
}
CTime CTime::operator+=(int s)//返回s秒後的時間
{
	int s1, s2;

	s1 = hour *3600 + minute * 60 + second;

	s2 = s1 + s;

	hour = s2/3600;

	minute = (s2%3600)/60;

	second = (s2%3600)%60;

	return (hour, minute, second);
}
CTime CTime::operator-=(int s)//返回s秒前的時間
{
	int s1, s2;

	s1 = hour *3600 + minute * 60 + second;

	s2 = s1 - s;

	if(s2 < 0)
	{
		s2 += 24*3600;
	}
	hour = s2/3600;

	minute = (s2%3600)/60;

	second = (s2%3600)%60;

	return (hour, minute, second);
}
void main()
{
    CTime t1,t2,t;

	cin >>t1 >> 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;
    //下面自行設計對其他運算符的重載的測試
    t = t1 + t2;

	cout << "t1+t2 = ";

	cout << t <<endl;

	t = t1 - t2;

	cout << "t1-t2 = ";

	cout << t <<endl;

	t = t1 + 500;

	cout << "t1+500 = ";

	cout << t <<endl;

	t = t1 - 500;

	cout << "t1-500 = ";

	cout << t <<endl;

	++t1;

	cout << "++t1 = ";

	cout << t <<endl;

	--t1;

	cout<< "--t1 = ";

	cout << t <<endl;

	t1 += t2;

	cout << "t1+=t2 = ";

	cout << t <<endl;

	t1 -= t2;

	cout << "t1-=t2 = ";

	cout << t <<endl;

	t2 += 500;

	cout <<"t2+=500 = ";

	cout << t <<endl;

	t2 -= 500;

	cout << "t2-=500 = ";

	cout << t <<endl;

    system("pause");
}

運行結果：

 

知識積累： 綜合到任務3