改正後的程式:
/*(檔案注釋頭部開始)
*程式的版權和版本聲明部分
*Copyright (c) 2011,煙台大學計算機學院學生
*All rights reserved.
*檔案名稱:Time類運算符的重載
*作 者:2011級計114-3張宗佳
*完成日期:2011年4月11号
*版本号:vc
* 對任務及求解方法的描述部分
* 輸入描術:
* 問題描述:實作Time類中的運算符重載
* 程式輸出:
* 程式頭部的注釋結束
*/
#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);//傳回c所規定的時、分、秒後的時間,例t1(8,20,25),t2(11,20,50),t1+t2為:41:15
CTime operator-(CTime &c);//對照+了解
CTime operator+(int s);//傳回s秒後的時間
CTime operator-(int s);//傳回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
//指派運算符的重載
CTime operator+=(CTime &c);
CTime operator-=(CTime &c);
CTime operator+=(int s);//傳回s秒後的時間
CTime operator-=(int s);//傳回s秒前的時間
};
//下面實作所有的運算符重載代碼。
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;
}
void CTime::display()
{
cout << hour << ":" << minute << ":" << second << endl;
}
//比較運算符(二目)的重載
bool CTime::operator > (CTime &t)
{
int t1,t2;
t1 = hour * 3600 + minute * 60 + second;
t2 = t.hour * 3600 + t.minute * 60 + t.second;
if(t1 > t2)
{
return true;
}
else
{
return false;
}
}
bool CTime::operator < (CTime &t)
{
int t1,t2;
t1 = hour * 3600 + minute * 60 + second;
t2 = t.hour * 3600 + t.minute * 60 + t.second;
if(t1 < t2)
{
return true;
}
else
{
return false;
}
}
bool CTime::operator >= (CTime &t)
{
int t1,t2;
t1 = hour * 3600 + minute * 60 + second;
t2 = t.hour * 3600 + t.minute * 60 + t.second;
if(t1 >= t2)
{
return true;
}
else
{
return false;
}
}
bool CTime::operator <= (CTime &t)
{
int t1,t2;
t1 = hour * 3600 + minute * 60 + second;
t2 = t.hour * 3600 + t.minute * 60 + t.second;
if(t1 <= t2)
{
return true;
}
else
{
return false;
}
}
bool CTime::operator == (CTime &t)
{
int t1,t2;
t1 = hour * 3600 + minute * 60 + second;
t2 = t.hour * 3600 + t.minute * 60 + t.second;
if(t1 == t2)
{
return true;
}
else
{
return false;
}
}
bool CTime::operator != (CTime &t)
{
int t1,t2;
t1 = hour * 3600 + minute * 60 + second;
t2 = t.hour * 3600 + t.minute * 60 + t.second;
if(t1 != t2)
{
return true;
}
else
{
return false;
}
}
//二目運算符的重載
//傳回c所規定的時、分、秒後的時間,例t1(8,20,25),t2(11,20,50),t1+t2為:41:15
CTime CTime::operator+(CTime &c)
{
CTime t;
t.second = second + c.second;
t.minute = minute + c.minute;
t.hour = hour + c.hour;
if(t.second > 60)
{
t.minute += t.second / 60 ;
t.second -= 60;
}
if(t.minute > 60)
{
t.hour += minute / 60;
t.minute -= 60;
}
if(t.hour > 24)
{
t.hour -= 24;
}
return t;
}
//對照+了解
CTime CTime::operator-(CTime &c)
{
int s,m,h;
s = second - c.second;
m = minute - c.minute;
h = hour - c.hour;
if(s < 0)
{
s += 60;
m --;
}
if(m < 0)
{
m += 60;
h --;
}
if(h < 0)
{
h += 24;
}
CTime t(h,m,s);
return t;
}
//傳回s秒後的時間
CTime CTime::operator+(int s)
{
CTime t;
t.second = second + s;
t.minute = minute;
t.hour = hour;
if(t.second > 59)
{
t.minute += t.second / 60;
t.second = 0;
}
return t;
}
//傳回s秒前的時間
CTime CTime::operator-(int s)
{
CTime t;
int sec = hour * 3600 + minute * 60 + second;
sec -= s;
t.hour = sec / 3600;
t.minute = (sec % 3600) / 60;
t.second = (sec % 3600) % 60;
return t;
}
//一目運算符的重載
//後置++,下一秒
CTime CTime::operator++(int)
{
CTime t = *this;
*this = *this + 1;
return t;
}
//前置++,下一秒
CTime CTime::operator++()
{
*this = *this + 1;
return *this;
}
//後置--,前一秒
CTime CTime::operator--(int)
{
CTime t = *this;
*this = *this - 1;
return t;
}
//前置--,前一秒
CTime CTime::operator--()
{
*this = *this - 1;
return *this;
}
//指派運算符的重載
CTime CTime::operator+=(CTime &c)
{
CTime t = *this + c;
return t;
}
CTime CTime::operator-=(CTime &c)
{
CTime t = *this - c;
return t;
}
//傳回s秒後的時間
CTime CTime::operator+=(int s)
{
CTime t = *this + s;
return t;
}
//傳回s秒前的時間
CTime CTime::operator-=(int s)
{
CTime t = *this - s;
return t;
}
//為簡化程式設計,請注意通過調用已有函數,利用好各函數之間的關系
void main()
{
CTime t1(8,20,25),t2(11,20,50),t;
int s = 30;
cout<<"t1為:";
t1.display();
cout<<"t2為:";
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 << "傳回一定時間之後的時間" << endl;
t = t1 + t2;
cout << "經過t2之後的t1是:";
t.display();
t = t1 - t2;
cout << "經過t2之前的t1是:";
t.display();
t = t1 + s;
cout << "s秒之後的t1是:";
t.display();
t = t1 - s;
cout << "s秒之前的t1是:";
t.display();
cout << "t2的下一秒是:";
t = t2++;
t.display();
cout << "t2的(前置)下一秒是:";
t = ++t2;
t.display();
cout << "t2的前一秒是:";
t = t2--;
t.display();
cout << "t2(前置)前一秒是:";
t = --t2;
t.display();
t = (t1 += t2);
cout << "t1+=t2為";
t.display();
t = (t1 -= t2);
cout << "t1-=t2為";
t.display();
t =(t1 += s);
cout << "t2+=s為";
t.display();
t = t1 -= s;
cout << "t2-=s為";
t.display();
system("pause");
}
實驗結果:
經驗積累:
我把後面的幾個成員函數在定義的時候在函數内定義了一個對象,并不是原來的那個*this = *this + c,
CTime CTime::operator-=(CTime &c)
{
CTime t = *this - c;
return t;
}
//傳回s秒後的時間
CTime CTime::operator+=(int s)
{
CTime t = *this + s;
return t;
}
//傳回s秒前的時間
CTime CTime::operator-=(int s)
{
CTime t = *this - s;
return t;
}
上機感言:
終于做出了正确的結果
沒有找到什麼原因,出來的結果最後三個不大對....還請那位仁兄幫幫忙...
源程式:
/*(檔案注釋頭部開始)
*程式的版權和版本聲明部分
*Copyright (c) 2011,煙台大學計算機學院學生
*All rights reserved.
*檔案名稱:Time類運算符的重載
*作 者:2011級計114-3張宗佳
*完成日期:2011年4月11号
*版本号:vc
* 對任務及求解方法的描述部分
* 輸入描術:
* 問題描述:實作Time類中的運算符重載
* 程式輸出:
* 程式頭部的注釋結束
*/
#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);//傳回c所規定的時、分、秒後的時間,例t1(8,20,25),t2(11,20,50),t1+t2為:41:15
CTime operator-(CTime &c);//對照+了解
CTime operator+(int s);//傳回s秒後的時間
CTime operator-(int s);//傳回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
//指派運算符的重載
CTime operator+=(CTime &c);
CTime operator-=(CTime &c);
CTime operator+=(int s);//傳回s秒後的時間
CTime operator-=(int s);//傳回s秒前的時間
};
//下面實作所有的運算符重載代碼。
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;
}
void CTime::display()
{
cout << hour << ":" << minute << ":" << second << endl;
}
//比較運算符(二目)的重載
bool CTime::operator > (CTime &t)
{
int t1,t2;
t1 = hour * 3600 + minute * 60 + second;
t2 = t.hour * 3600 + t.minute * 60 + t.second;
if(t1 > t2)
{
return true;
}
else
{
return false;
}
}
bool CTime::operator < (CTime &t)
{
int t1,t2;
t1 = hour * 3600 + minute * 60 + second;
t2 = t.hour * 3600 + t.minute * 60 + t.second;
if(t1 < t2)
{
return true;
}
else
{
return false;
}
}
bool CTime::operator >= (CTime &t)
{
int t1,t2;
t1 = hour * 3600 + minute * 60 + second;
t2 = t.hour * 3600 + t.minute * 60 + t.second;
if(t1 >= t2)
{
return true;
}
else
{
return false;
}
}
bool CTime::operator <= (CTime &t)
{
int t1,t2;
t1 = hour * 3600 + minute * 60 + second;
t2 = t.hour * 3600 + t.minute * 60 + t.second;
if(t1 <= t2)
{
return true;
}
else
{
return false;
}
}
bool CTime::operator == (CTime &t)
{
int t1,t2;
t1 = hour * 3600 + minute * 60 + second;
t2 = t.hour * 3600 + t.minute * 60 + t.second;
if(t1 == t2)
{
return true;
}
else
{
return false;
}
}
bool CTime::operator != (CTime &t)
{
int t1,t2;
t1 = hour * 3600 + minute * 60 + second;
t2 = t.hour * 3600 + t.minute * 60 + t.second;
if(t1 != t2)
{
return true;
}
else
{
return false;
}
}
//二目運算符的重載
//傳回c所規定的時、分、秒後的時間,例t1(8,20,25),t2(11,20,50),t1+t2為:41:15
CTime CTime::operator+(CTime &c)
{
CTime t;
t.second = second + c.second;
t.minute = minute + c.minute;
t.hour = hour + c.hour;
if(t.second > 60)
{
t.minute += t.second / 60 ;
t.second -= 60;
}
if(t.minute > 60)
{
t.hour += minute / 60;
t.minute -= 60;
}
if(t.hour > 24)
{
t.hour -= 24;
}
return t;
}
//對照+了解
CTime CTime::operator-(CTime &c)
{
int s,m,h;
s = second - c.second;
m = minute - c.minute;
h = hour - c.hour;
if(s < 0)
{
s += 60;
m --;
}
if(m < 0)
{
m += 60;
h --;
}
if(h < 0)
{
h += 24;
}
CTime t(h,m,s);
return t;
}
//傳回s秒後的時間
CTime CTime::operator+(int s)
{
CTime t;
t.second = second + s;
t.minute = minute;
t.hour = hour;
if(t.second > 59)
{
t.minute += t.second / 60;
t.second = 0;
}
return t;
}
//傳回s秒前的時間
CTime CTime::operator-(int s)
{
CTime t;
int sec = hour * 3600 + minute * 60 + second;
sec -= s;
t.hour = sec / 3600;
t.minute = (sec % 3600) / 60;
t.second = (sec % 3600) % 60;
return t;
}
//一目運算符的重載
//後置++,下一秒
CTime CTime::operator++(int)
{
CTime t = *this;
*this = *this + 1;
return t;
}
//前置++,下一秒
CTime CTime::operator++()
{
*this = *this + 1;
return *this;
}
//後置--,前一秒
CTime CTime::operator--(int)
{
CTime t = *this;
*this = *this - 1;
return t;
}
//前置--,前一秒
CTime CTime::operator--()
{
*this = *this - 1;
return *this;
}
//指派運算符的重載
CTime CTime::operator+=(CTime &c)
{
*this= *this + c;
return *this;
}
CTime CTime::operator-=(CTime &c)
{
//*this = *this - c;
//return *this;
int s,m,h;
s = second - c.second;
m = minute - c.minute;
h = hour - c.hour;
if(s < 0)
{
s += 60;
m --;
}
if(m < 0)
{
m += 60;
h --;
}
if(h < 0)
{
h += 24;
}
CTime t(h,m,s);
return t;
}
//傳回s秒後的時間
CTime CTime::operator+=(int s)
{
*this= *this + s;
return *this;
}
//傳回s秒前的時間
CTime CTime::operator-=(int s)
{
//*this = *this - s;
//return *this;
CTime t;
int sec = hour * 3600 + minute * 60 + second;
sec -= s;
t.hour = sec / 3600;
t.minute = (sec % 3600) / 60;
t.second = (sec % 3600) % 60;
return t;
}
//為簡化程式設計,請注意通過調用已有函數,利用好各函數之間的關系
void main()
{
CTime t1(8,20,25),t2(11,20,50),t;
int s = 30;
cout<<"t1為:";
t1.display();
cout<<"t2為:";
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 << "傳回一定時間之後的時間" << endl;
t = t1 + t2;
cout << "經過t2之後的t1是:";
t.display();
t = t1 - t2;
cout << "經過t2之前的t1是:";
t.display();
t = t1 + s;
cout << "s秒之後的t1是:";
t.display();
t = t1 - s;
cout << "s秒之前的t1是:";
t.display();
cout << "t2的下一秒是:";
t = t2++;
t.display();
cout << "t2的(前置)下一秒是:";
t = ++t2;
t.display();
cout << "t2的前一秒是:";
t = t2--;
t.display();
cout << "t2(前置)前一秒是:";
t = --t2;
t.display();
t = (t1 += t2);
cout << "t1+=t2為";
t.display();
t = (t1 -= t2);
cout << "t1-=t2為";
t.display();
t =(t1 += s);
cout << "t2+=s為";
t.display();
t = t1 -= s;
cout << "t2-=s為";
t.display();
system("pause");
}
實驗結果: