* 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: 第八週 任務二
* 作 者: 楊森
* 完成日期: 2012 年 4 月 10 日
* 版 本 號: V1.0
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);
void display();
//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
};
//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
void CTime::setTime(int h,int m,int s)
{
hour = h;
minute = m;
second = s;
}
CTime::CTime(int h,int m,int s)
{
hour = h;
minute = m;
second = s;
}
void CTime::display()
{
cout << hour << ":" << minute << ":" << second << endl;
}
//比較運算符(二目)的重載
bool CTime::operator > (CTime &t)
{
if( (hour * 3600 + minute * 60 + second) > (t.hour * 3600 + t.minute * 60 + t.second ))
{
return true;
}
else
{
return false;
}
}
bool CTime::operator < (CTime &t)
{
if( (hour * 3600 + minute * 60 + second) < (t.hour * 3600 + t.minute * 60 + t.second ))
{
return true;
}
else
{
return false;
}
}
bool CTime::operator >= (CTime &t)
{
if( (hour * 3600 + minute * 60 + second) >= (t.hour * 3600 + t.minute * 60 + t.second ))
{
return true;
}
else
{
return false;
}
}
bool CTime::operator <= (CTime &t)
{
if( (hour * 3600 + minute * 60 + second) <= (t.hour * 3600 + t.minute * 60 + t.second ))
{
return true;
}
else
{
return false;
}
}
bool CTime::operator == (CTime &t)
{
if( (hour * 3600 + minute * 60 + second) == (t.hour * 3600 + t.minute * 60 + t.second ))
{
return true;
}
else
{
return false;
}
}
bool CTime::operator != (CTime &t)
{
if( (hour * 3600 + minute * 60 + second) != (t.hour * 3600 + t.minute * 60 + t.second ))
{
return true;
}
else
{
return false;
}
}
//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
{
int a,b, e, d;
CTime t;
a = hour * 3600 + minute * 60 + second;
b = c.hour * 3600 + c.minute * 60 + c.second;
e = a + b;
t.hour = e / 3600;
d = e % 3600;
t.minute = d / 60;
t.second = d % 60;
if( t.hour > 12 )
{
t.hour -= 12;
}
return t;
}
CTime CTime::operator-(CTime &c)//對照+理解
{
int a,b, e, d;
CTime t;
a = hour * 3600 + minute * 60 + second;
b = c.hour * 3600 + c.minute * 60 + c.second;
e = a - b;
t.hour = e / 3600;
d = e % 3600;
t.minute = d / 60;
t.second = d % 60;
if( t.hour > 12 )
{
t.hour -= 12;
}
return t;
}
CTime CTime::operator+(int s)//返回s秒後的時間
{
int a, c, d;
CTime t;
a = hour * 3600 + minute * 60 + second;
c = a + s;
t.hour = c / 3600;
d = c % 3600;
t.minute = d / 60;
t.second = d % 60;
if( t.hour > 12 )
{
t.hour -= 12;
}
return t;
}
CTime CTime::operator-(int s)//返回s秒前的時間
{
int a, c, d;
CTime t;
a = hour * 3600 + minute * 60 + second;
c = a - s;
t.hour = c / 3600;
d = c % 3600;
t.minute = d / 60;
t.second = d % 60;
if( t.hour > 12 )
{
t.hour -= 12;
}
return t;
}
//一目運算符的重載
CTime CTime::operator++(int)//後置++,下一秒
{
CTime t(*this);
second++;
if( second >= 60)
{
second -= 60;
++minute;
if( minute >= 60)
{
minute -= 60;
++hour;
if( hour >= 12)
{
hour -= 12;
}
}
}
return t;
}
CTime CTime::operator++()//前置++,下一秒
{
if( ++second >= 60)
{
second -= 60;
++minute;
if( minute >= 60)
{
minute -= 60;
++hour;
if( hour >= 12)
{
hour -= 12;
}
}
}
return *this;
}
CTime CTime::operator--(int)//後置--,前一秒
{
CTime t(*this);
second--;
if( second < 0)
{
second = 59;
--minute;
if( minute < 0)
{
minute = 59;
--hour;
if( hour < 0)
{
hour = 11;
}
}
}
return t;
}
CTime CTime::operator--()//前置--,前一秒
{
if( --second < 0)
{
second = 59;
--minute;
if( minute < 0)
{
minute = 59;
--hour;
if( hour < 0)
{
hour = 11;
}
}
}
return (*this);
}
//賦值運算符的重載
CTime CTime::operator+=(CTime &c)
{
int a,b, e, d;
a = hour * 3600 + minute * 60 + second;
b = c.hour * 3600 + c.minute * 60 + c.second;
e = a + b;
hour = e / 3600;
d = e % 3600;
minute = d / 60;
second = d % 60;
if( hour > 12 )
{
hour -= 12;
}
return (*this);
}
CTime CTime::operator-=(CTime &c)
{
int a,b, e, d;
//CTime t;
a = hour * 3600 + minute * 60 + second;
b = c.hour * 3600 + c.minute * 60 + c.second;
e = a - b;
hour = e / 3600;
d = e % 3600;
minute = d / 60;
second = d % 60;
if( hour > 12 )
{
hour -= 12;
}
return (*this);
}
CTime CTime::operator+=(int s)//返回s秒後的時間
{
unsigned short int a, c, d;
//CTime t;
a = hour * 3600 + minute * 60 + second;
c = a + s;
hour = c / 3600;
d = c % 3600;
minute = d / 60;
second = d % 60;
if( hour > 12 )
{
hour -= 12;
}
return (*this);
}
CTime CTime::operator-=(int s)//返回s秒前的時間
{
int a, c, d;
//CTime t;
a = hour * 3600 + minute * 60 + second;
c = a - s;
hour = c / 3600;
d = c % 3600;
minute = d / 60;
second = d % 60;
if( hour > 12 )
{
hour -= 12;
}
return (*this);
}
void main()
{
CTime t1(8,20,25),t2(11,20,50),t;
cout<<"t1爲:";
t1.display();
cout<<"t2爲:";
t2.display();
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 = ";
t.display();
t = t2 - t1;
cout << "t2-t1 = ";
t.display();
t = t1 + 30;
cout << "t1+30= ";
t.display();
t = t2 - 30;
cout <<"t2-30 = ";
t.display();
cout<<endl;
t = ++ t1;
cout << "++t1 = ";
t.display ();
cout << "t1 = ";
t1.display ();
t = t1++;
cout << "t1++ = ";
t.display ();
cout << "t1 = ";
t1.display ();
t = -- t1;
cout << "--t1 = ";
t.display ();
cout << "t1 = ";
t1.display ();
t = t1--;
cout << "t1-- = ";
t.display ();
cout<<endl;
cout<<"t1爲:";
t1.display();
cout<<"t2爲:";
t2.display();
t2 -= t1;
cout << "(t2-=t1) = ";
t2.display ();
cout<<"t1爲:";
t1.display();
cout<<"t2爲:";
t2.display();
t = t2;
t += t1;
cout << "(t2+=t1) = ";
t.display ();
system("pause");
}
運行結果:
小感:真的好長啊~