01./* 02.* 程式的著作權和版本聲明部分 03.* Copyright (c)2013, 煙台大學電腦學院學生 04.* All rightsreserved. 05.* 檔案名稱: ctime.cpp 06.* 作 者:趙冠哲 07.* 完成日期:2013年5月7日 08.* 版本號碼: v1.0 09.* 輸入描述: 10.* 問題描述: 11.*/ #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(){} friend istream& operator >> (istream&, CTime&); friend ostream& operator << (ostream&, CTime&); //比較子(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); //二目運算子的重載 CTime operator+(CTime &c);//返回c所規定的時、分、秒後的時間 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 //一目運算子的重載 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 //賦值運算子的重載 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子多載代碼。//為簡化編程,請注意通過調用已有函數,利用好各函數之間的關係istream& operator >> (istream& input, CTime& t){ cout << "請輸入時分秒(h m s):" << endl; input >> t.hour >> t.minute >> t.second; if (t.hour < 0 || t.hour > 59 || t.minute < 0 || t.minute > 59 || t.second < 0 || t.second > 59) { t.hour = 0, t.minute = 0, t.second = 0; cout << "時間非法!" << endl; exit(0); } return input;}ostream& operator << (ostream& output, CTime& t){ output << t.hour << ":" << t.minute << ":" << t.second; return output;}bool CTime::operator > (CTime &t){ if (hour > t.hour) return true; else if (hour == t.hour && minute > t.minute) return true; else if (minute == t.minute && second > t.second) return true; else return false;}bool CTime::operator < (CTime &t){ if (hour < t.hour) return true; else if (hour == t.hour && minute < t.minute) return true; else if (minute == t.minute && second < t.second) return true; else return false;}bool CTime::operator >= (CTime &t){ if (hour > t.hour) return true; else if (hour == t.hour && minute > t.minute) return true; else if (minute == t.minute && second >= t.second) return true; else return false;}bool CTime::operator <= (CTime &t){ if (hour < t.hour) return true; else if (hour == t.hour && minute < t.minute) return true; else if (minute == t.minute && second <= t.second) return true; else return false;}bool CTime::operator==(CTime &t){ if (hour==t.hour&&minute==t.minute&&second==t.second) return true; else return false;}bool CTime::operator != (CTime &t){ if (hour == t.hour && minute == t.minute && second == t.second) return false; else return true;}CTime CTime::operator+(CTime &c){ CTime ct(*this); if (ct.second + c.second >= 60) { ct.second = ct.second + c.second - 60; ++ct.minute; } else ct.second = ct.second + c.second; if (ct.minute + c.minute >= 60) { ct.minute = ct.minute + c.minute - 60; ++ct.hour; } else ct.minute = ct.minute + c.minute; if (ct.hour + c.hour >= 60) ct.hour = ct.hour + c.hour - 60; else ct.hour = ct.hour + c.hour; return ct;}CTime CTime::operator-(CTime &c){ CTime ct(*this); if (ct.second < c.second) { --ct.minute; ct.second = ct.second + 60 - c.second; } else ct.second = ct.second - c.second; if (ct.minute < c.minute) { --ct.hour; ct.minute = ct.minute + 60 - c.minute; } else ct.minute = ct.minute - c.minute; if (ct.hour < c.hour) ct.hour = ct.hour + 24 - c.hour; else ct.hour = ct.hour - c.hour; return ct;}CTime CTime::operator+(int s){ CTime ct; ct.hour = s / 3600; s = s % 3600; ct.minute = s / 60; ct.second = s % 60; return (*this + ct);}CTime CTime::operator-(int s){ CTime ct; ct.hour = s / 3600; s = s % 3600; ct.minute = s / 60; ct.second = s % 60; return (*this - ct);}CTime CTime::operator++(int){ CTime tp(*this); *this = *this + 1; return tp;}CTime CTime::operator++(){ return (*this = *this + 1);}CTime CTime::operator--(int){ CTime tp(*this); *this = *this - 1; return tp;}CTime CTime::operator--(){ return (*this = *this - 1);//需要改變其值}CTime CTime::operator+=(CTime &c){ return (*this = *this + c);}CTime CTime::operator-=(CTime &c){ return (*this = *this - c);}CTime CTime::operator+=(int s){ return (*this = *this + s);}CTime CTime::operator-=(int s){ return (*this = *this - s);}void main(){ //CTime t1(8, 20, 25), t2(11, 20, 50), t; CTime t1, t2, t; cin >> t1 >> t2; cout << "t1為:" << t1 << endl; cout << "t2為:" << t2 << endl; 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子的重載的測試 t = t1 + t2; cout << "t1+t2=" << t << endl; t = t1 - t2; cout << "t1-t2=" << t << endl; t2 = t2 - 365; cout << "t2前進365秒。t2-365=" << t2 << endl; t1 = t1 + 3; cout << "t1後退3秒。t1+3=" << t1 << endl; cout << "++t1=" << ++t1 << endl; cout << "t1=" << t1 << endl; cout << "--t1=" << --t1 << endl; cout << "t1=" << t1 << endl; cout << "t2++=" << t2++ << endl; cout << "t2=" << t2 << endl; cout << "t2--=" << t2-- << endl; cout << "t2=" << t2 << endl; }
運行結果: