第九周 任务二

/* (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：   Triangle.cpp                            

* 作    者：      计114-4   刘向一            
* 完成日期：   2012 年 4月17日 
* 版 本 号：   V 1.0 
* 对任务及求解方法的描述部分 
* 输入描述： 
* 问题描述：
* 程序输出：  
* 程序头部的注释结束 

*/

#include <iostream.h>        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);//比较二目运算符的重载            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:41:15            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       //重载流插入运算符“<<”      friend ostream& operator << (ostream&,CTime&);      //重载流提取运算符“>>”      friend istream& operator >> (istream&,CTime&);  };  CTime::CTime(int h,int m,int s):hour(h),minute(m),second(s){}        //下面实现所有的运算符重载代码//比较二目运算符的重载           ostream &operator << (ostream &output,CTime &c)  {       output<<c.hour<<":"<<c.minute <<":"<<c.second <<endl;       return output;  }     istream &operator >> (istream &input,CTime &c)  {       input>>c.hour>>c.minute>>c.second;      return input;  }  bool CTime::operator > (CTime &t)        {             if (hour>t.hour) return true;        if (hour<t.hour) return false;        if (minute>t.minute) return true;        if (minute<t.minute) return false;        if (second>t.second) return true;        return false;    }        bool CTime::operator < (CTime &t)        {            if(hour<t.hour)                return true;            else if(hour>t.hour)                return false;            else if(minute<t.minute )                return true;            else if(minute>t.minute )                return false;            else if(second<t.second )                return true;            else if(second>t.second )                return false;            return false;        }        bool CTime::operator >= (CTime &t)        {            CTime t1;            t1.hour =hour;            t1.minute =minute ;            t1.second =second ;            if (t1<t)                return false;            return true;        }        bool CTime::operator <= (CTime &t)        {            CTime t1;            t1.hour =hour;            t1.minute =minute ;            t1.second =second ;            if (t1>t)                return false;            return true;        }        bool CTime::operator == (CTime &t)        {            CTime t1;            t1.hour =hour;            t1.minute =minute ;            t1.second =second ;            if (t1>t)                return false;            if (t1<t)                return false;            return true;        }        bool CTime::operator != (CTime &t)        {            CTime t1;            t1.hour =hour;            t1.minute =minute ;            t1.second =second ;            if(t1==t)                return false;            return true;        }        //二目运算符的重载        CTime 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:41:15        {            CTime c2;          int time;      time=(hour*3600+minute*60+second)+(c.hour*3600+c.minute*60+c.second);      c2.hour=time/3600;      time=time%3600;      c2.minute=time/60;      time=time%60;      c2.second=time;      return c2;      }        CTime CTime::operator-(CTime &c)//对照+理解        {            CTime c2;       int time;        time=(hour*3600+minute*60+second)-(c.hour*3600+c.minute*60+c.second);        c2.hour=time/3600;        time=time%3600;        c2.minute=time/60;        time=time%60;        c2.second=time;        return c2;        }        CTime CTime::operator+(int s)//返回s秒后的时间        {            int time=hour*3600+minute*60+second+s;      hour=time/3600;      time=time%3600;      minute=time/60;      time=time%60;      second=time;        return (*this);    }        CTime CTime::operator-(int s)//返回s秒前的时间        {            int time=hour*3600+minute*60+second;        time=time-s;        hour=time/3600;        time=time%3600;        minute=time/60;      time=time%60;       second=time;        return (*this);} //一目运算符的重载        CTime CTime::operator++(int)//后置++，下一秒        {            CTime temp(*this);            second++;            if(second>=60)            {                 second-=60;                ++minute;            }            return temp;        }        CTime CTime::operator++()//前置++，下一秒        {            if(++second>=60)            {                second-=60;                ++minute;            }            return *this;        }        CTime CTime::operator--(int)//后置--，前一秒        {            CTime temp(*this);            second--;            if(second<0)            {                 second=59;                --minute;            }            return temp;        }        CTime CTime::operator--()//前置--，前一秒        {            if(--second<0)            {                second=59;                --minute;            }            return *this;        }        //赋值运算符的重载             CTime CTime::operator+=(CTime &c)        {            CTime t1,t;            t1.hour =hour;            t1.minute =minute ;            t1.second =second ;            t=t1+c;            hour=t.hour ;            minute=t.minute ;            second=t.second ;            return t;        }        CTime CTime::operator-=(CTime &c)        {            *this=*this-c;        return *this;        }        CTime CTime::operator+=(int s)//返回s秒后的时间        {            CTime t1,t;            t1.hour =hour;            t1.minute =minute ;            t1.second =second ;            t=t1+s;            hour=t.hour ;            minute=t.minute ;            second=t.second ;            return t;        }        CTime CTime::operator-=(int s)//返回s秒前的时间        {            *this=*this-s;        return *this;    }        void main()        {            CTime t1(10,15,22),t2(8,24,37),t;            int n;       cout<<"请输入t1的时间：（以aa bb cc的格式输入）";      cin>>t1;      cout<<"请输入t2的时间：（以aa bb cc的格式输入）";      cin>>t2;      cout<<"t1为：";            cout<<t1;            cout<<"t2为：";            cout<<t2;            cout<<"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;            cout<<"t1+t2的时间为：";            t=t1+t2;            cout<<t;            cout<<"t2-t1的时间为：";            t=t2-t1;            cout<<t;            cout<<endl;            cout<<"请输入您想增加的秒数：";            cin>>n;            t=t1+n;            cout<<"增加"<<n<<"秒后的时间为：";            cout<<t;            t=t1-n;            cout<<"增加"<<n<<"秒前的时间为：";            cout<<t;            cout<<endl;            cout<<"对t1后置++,结果为：";            t=t1++;            cout<<t;            cout<<"运算结束后，t1的值为：";            cout<<t1;            cout<<endl;            cout<<"对t1前置++,结果为：";            t=++t1;            cout<<t;            cout<<"运算结束后，t1的值为：";            cout<<t1;            cout<<endl;            cout<<"对t1后置--,结果为：";            t=t1--;            cout<<t;            cout<<"运算结束后，t1的值为：";            cout<<t1;            cout<<endl;            cout<<"对t1前置--,结果为：";            t=--t1;            cout<<t;            cout<<"运算结束后，t1的值为：";            cout<<t1;            cout<<endl;            cout<<"运算t1+=t2的结果为：";            t1+=t2;            cout<<t1;            cout<<endl;            cout<<"此时t1的值为：";            cout<<t1;            cout<<"此时t2的值为：";            cout<<t2;            cout<<endl;            cout<<"运算t1-=t2的结果为：";            t1-=t2;            cout<<t1;            cout<<"此时t1的值为：";            cout<<t1;            cout<<"此时t2的值为：";            cout<<t2;            cout<<endl;            cout<<"请输入您想增加的秒数：";            cin>>n;            t1+=n;            cout<<"t1增加"<<n<<"秒后的时间为：";            cout<<t1;            cout<<"t2增加"<<n<<"秒前的时间为：";            t2-=n;            cout<<t2;            cout<<endl;            }