第九周上机任务项目2-Time类

01./*      02.* 程序的版权和版本声明部分      03.* Copyright (c)2013, 烟台大学计算机学院学生      04.* All rightsreserved.      05.* 文件名称： ctime.cpp                                 06.* 作    者：赵冠哲                                  07.* 完成日期：2013年5月7日      08.* 版本号： v1.0            09.* 输入描述：      10.* 问题描述：    11.*/ #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    CTime 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;    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;       t2 = t2 - 365;    cout << "t2前进365秒。t2-365=" << t2 << endl;    t1 = t1 + 3;    cout << "t1后退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;  }

运行结果：