《C++第九周实验报告2-1》---接第8周任务2，定义Time类中的<<和>>运算符重载，实现时间的输入输出

/* (程序头部注释开始)* 程序的版权和版本声明部分* Copyright (c) 2011, 烟台大学计算机学院学生 * All rights reserved.* 文件名称：  CTime.cpp                            * 作    者：   计114-3 王兴锋     * 完成日期：    2012  年  4 月  16  日* 版 本 号：       V 2.0* 对任务及求解方法的描述部分* 输入描述： 实现Time类中的运算符重载* 问题描述：实现Time类中的运算符重载定义Time 类中的<<和>>运算符重载，实现时间的输入输出，改造原程序中对运算结果显示方式，使程序读起来更自然。* 程序输出： 对时间运算后的结果。* 程序头部的注释结束*/#include <iostream>using namespace std;class CTime{private:unsigned short int hour;    // 时unsigned short int minute;  // 分unsigned short int second;  // 秒public:CTime(){}friend istream& operator >> (istream&, CTime&);friend ostream& operator << (ostream&, CTime&);//比较运算符(二目)的重载bool operator > (CTime &t);bool operator < (CTime &t);bool operator >= (CTime &t);bool operator <= (CTime &t);bool operator == (CTime &t);bool operator != (CTime &t);//二目运算符的重载CTime operator+(CTime &c);//返回c所规定的时、分、秒后的时间，例t1(8,20,25),t2(11,20,50)，t1+t2为:41:15CTime operator-(CTime &c);//对照+理解CTime operator+(int s);//返回s秒后的时间CTime operator-(int s);//返回s秒前的时间//一目运算符的重载CTime operator++(int);//后置++，下一秒CTime operator++();//前置++，下一秒CTime operator--(int);//后置--，前一秒CTime operator--();//前置--，前一秒//赋值运算符的重载     CTime operator+=(CTime &c);CTime operator-=(CTime &c);CTime operator+=(int s);//返回s秒后的时间CTime operator-=(int s);//返回s秒前的时间};//下面实现所有的运算符重载代码。//为简化编程，请注意通过调用已有函数，利用好各函数之间的关系istream& operator >> (istream& input, CTime& t){cout << "请输入时分秒（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 << "时间非法！" << 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;elsereturn 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;elsereturn 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;elsereturn 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;elsereturn false;}bool CTime::operator == (CTime &t){if (hour == t.hour && minute == t.minute && second == t.second)return true;elsereturn false;}bool CTime::operator != (CTime &t){if (hour == t.hour && minute == t.minute && second == t.second)return false;elsereturn true;}CTime CTime::operator+(CTime &c){CTime ct(*this);if (ct.second + c.second >= 60){ct.second = ct.second + c.second - 60;++ct.minute;}elsect.second =  ct.second + c.second;if (ct.minute + c.minute >= 60){ct.minute = ct.minute + c.minute - 60;++ct.hour;}elsect.minute = ct.minute + c.minute;if (ct.hour + c.hour >= 60)ct.hour = ct.hour + c.hour - 60;elsect.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;}elsect.second = ct.second - c.second;if (ct.minute < c.minute){--ct.hour;ct.minute = ct.minute + 60 - c.minute;}elsect.minute = ct.minute - c.minute;if (ct.hour < c.hour)ct.hour = ct.hour + 24 - c.hour;elsect.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);//需要改变其值}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为：" << t1 << endl;cout << "t2为：" << t2 << endl;cout << "下面比较两个时间大小：\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;//下面自行设计对其他运算符的重载的测试t = t1 + t2;cout << "t1+t2=" << t << endl;t = t1 - t2;cout << "t1-t2=" << t << endl;t1 = t1 + 3600;cout << "t1后退3600秒。t1+3600=" << t1 << endl;t2 = t2 - 3600;cout << "t2前进3600秒。t2-3600=" << t2 << 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;system("PAUSE");}/*输入输出运算的重载要灵活的运用，这样程序就不会显得太乱。*/