Time类中的运算符重载

/** 程序的版权和版本声明部分* Copyright (c)2012, 烟台大学计算机学院学生* All rightsreserved.* 文件名称： object.cpp* 作者：隋 鑫* 完成日期： 2013年 4 月 19 日* 版本号： v1.0* 输入描述：无* 问题描述：* 程序输出：*/#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(int h=0,int m=0,int s=0);//void setTime(int h,int m,int s);void display();//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 &c2);//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 &c2);//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，前置与后置返回值不一样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); //CTime operator-=(int s); };//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    CTime::CTime(int h,int m,int s){hour=h;minute=m;second=s;}    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)return true;else if(minute!=t.minute)return true;else if(second!=t.second)return true;elsereturn false;}CTime CTime::operator+(CTime &c2){CTime c;c.second=second+c2.second;  c.minute=minute+c2.minute;if(c.second>59)c.second-=60;    c.minute++;c.hour=hour+c2.hour;if(c.minute>59)    c.minute-=60;c.hour++;if(c.hour>23)c.hour-=24;  return c; }CTime CTime::operator-(CTime &c2){CTime c;c.second=second-c2.second;c.minute=minute-c2.minute;if(c.second>59)    c.second+=60;         c.minute--;c.hour=hour-c2.hour;if(c.minute>59)    c.minute+=60;c.hour--;if(c.hour>23)c.hour+=24;  return c;}CTime CTime::operator+(int s){CTime c;c.second=second+s;c.minute=minute;c.hour=hour;if(c.second>59)    c.minute=c.minute+c.second/60;    c.second%=60;if(c.minute>69)c.hour=c.hour+c.minute/60;if(c.hour>23)c.hour%=24;return c;}CTime CTime::operator-(int s){CTime c;c.second=second-s%60;c.minute=minute-s/60%60;c.hour=hour-s/3600%24;if(c.second>59)c.second+=60;    c.minute--; if(c.minute>59)c.minute+=60;c.hour--;    if(c.hour>23)c.hour+=24;return c;}CTime CTime::operator++( int){ CTime temp(*this); second++;{if(second>=60){second-=60;++minute;}else if(minute>=60){minute-=60;++hour;}else if (hour>=24)    hour-=24;}       return *this   ;}CTime  CTime::operator++(){{if(++second>=60){second-=60;++minute;}else if(minute>=60){minute-=60;++hour;}else if (hour>=24)    hour-=24;}       return *this   ;}CTime CTime::operator--( int){ CTime temp(*this); second--;{if(second>=60){second+=60;--minute;}else if(minute>=60){minute+=60;--hour;}else if (hour>=24)    hour+=24;}       return *this   ;}CTime CTime:: operator--(){{if(--second>=60){second+=60;--minute;}else if(minute>=60){minute+=60;--hour;}else if (hour>=24)    hour+=24;}       return *this   ;}void CTime::display(){cout<<hour<<":"<<minute<<":"<<second<<endl;}int main(){CTime t1(8,20,25),t2(11,20,50),t;int s=500;cout<<"t1为：";t1.display();cout<<"t2为：";t2.display();cout<<"s为："<<s<<"s"<<endl;cout<<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;t=t1+t2;cout<<"t1+t2=";t.display();t=t1-t2;cout<<"t1-t2=";    t.display();cout<<endl;t=t1+s;cout<<"t1+s=";    t.display();t=t2+s;cout<<"t2+s=";    t.display();t=t1-s;cout<<"t1-s=";    t.display();t=t2-s;cout<<"t2-s=";    t.display();cout<<endl;t=t1++;cout<<"t1++=";    t.display();t=t1--;cout<<"t1--=";    t.display();t=t1--;cout<<"t1--=";    t.display();t=t2--;cout<<"t2--=";    t.display();t=++t1;cout<<"++t1=";    t.display();t=++t2;cout<<"++t2=";    t.display();t=--t1;cout<<"--t1=";    t.display();t=--t2;cout<<"--t2=";    t.display();cout<<endl;return 0;}

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