第八周实验报告任务2

/* (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：                               
* 作    者：李君凯                         

* 完成日期：   2012      年   4    月   11 日 
* 版 本 号：           
 
* 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>
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 &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
};
//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;
}
void CTime::setTime(int h,int m,int s)
{
hour=h;
minute=m;
second=s;
}
void CTime::display()
{
cout<<"("<<hour<<","<<minute<<","<<second<<")";
}
bool CTime:: operator > (CTime &t)
{
if(hour>t.hour)
return true;
else if(hour==t.hour)
{
if(minute>t.minute)return true;
else if(minute==t.minute)
{
if(second>t.second)return true;
else
return false;
}
else
return false;
}
else
return false;
}

bool CTime:: operator<(CTime &t)
{
if(hour<t.hour)
return true;
else if(hour==t.hour)
{
if(minute<t.minute)return true;
else if(minute==t.minute)
{
if(second<t.second)return true;
else
return false;
}
else
return false;
}
else
return false;
}
bool CTime:: operator >= (CTime &t)
{
if(hour>t.hour)
return true;
else if(hour==t.hour)
{
if(minute>t.minute)return true;
else if(minute==t.minute)
{
if(second>t.second)return true;
else if(second==t.second)return true;
else
return false;
}
else
return false;
}
else
return false;
}
bool CTime::operator <= (CTime &t)
{
if(hour<t.hour)
return true;
else if(hour==t.hour)
{
if(minute<t.minute)return true;
else if(minute==t.minute)
{
if(second<t.second)return true;
else if(second==t.second)return true;
else
return false;
}
else
return false;
}
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;
}
//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 t;
t.second=second+c.second;
if(t.second>60)
{
t.second=t.second-60;
t.minute=minute+c.minute+1;
if(t.minute>=60)
{
t.minute=t.minute-60;
t.hour=hour+c.hour+1;
if(t.hour>23)
{
t.hour=t.hour-24;
}
}
}
t.minute=minute+c.minute;
if(t.minute>=60)
{
t.minute=t.minute-60;
t.hour=hour+c.hour+1;
if(t.hour>23)
{
t.hour=t.hour-24;
}
}
t.hour=hour+c.hour;
if(t.hour>23)
{
t.hour=t.hour-24;
}
return t;
}

CTime CTime::operator-(CTime &c)//对照+理解
{
CTime t1,t2;
t1.second =second+60*minute+3600*hour;
t2.second =c.second+60*c.minute+3600*c.hour;
if(t1.second>t2.second )
t1.second =t1.second-t2.second ;
else
t1.second =t2.second -t1.second ;
t1.hour =t1.second /3600;
t1.minute =(t1.second %3600)/60;
t1.second =(t1.second %3600)%60;
return t1;
}

CTime CTime:: operator+(int s)//返回s秒后的时间
{
CTime c;
c.second=second+s;
if(c.second>59)
{
c.minute=minute+c.second/60;
c.second=c.second%60;
}
else
c.minute=minute;
if(c.minute>59)
{
c.hour=c.minute/60+hour;
c.minute=c.minute%60;
}
else
c.hour=hour;
if(c.hour>23)
{
c.hour=hour%24;
}
return c;
}

CTime CTime::operator-(int s)//返回s秒前的时间
{
CTime c;
c.second=hour*3600+minute*60+second;
c.second=c.second-s;
c.hour=c.second/3600;
c.minute=(c.second%3600)/60;
c.second=(c.second%3600)%60;
return c;
}
//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;
if(minute>=60)
{
minute-=60;
++hour;
if(hour>=24)
{
hour-=24;
}
}
}
return temp;
}
CTime CTime::operator++()//前置++，下一秒
{
if(++second>=60)
{
second-=60;
++minute;
if(minute>=60)
{
minute-=60;
++hour;
if(hour>=24)
{
hour-=24;
}
}
}
return *this;
}

CTime CTime::operator--(int)//后置--，前一秒
{
CTime temp(*this);
second=hour*3600+minute*60+second;
second=second-1;
hour=minute/3600;
minute=(second%3600)/60;
second=(second%3600)%60;
return temp;
}

CTime CTime::operator--()//前置--，前一秒
{
CTime temp(*this);
second=hour*3600+minute*60+second;
second=second-1;
hour=second/3600;
minute=(second%3600)/60;
second=(second%3600)%60;
return *this;
}
//赋值运算符的重载
CTime CTime::operator+=(CTime &c)
{
CTime t;
t.second=second+c.second;
if(t.second>=60)
{
t.second=t.second-60;
t.minute=minute+c.minute+1;
if(t.minute>=60)
{
t.minute=t.minute-60;
t.hour=hour+c.hour+1;
if(t.hour>23)
{
t.hour=t.hour-24;
}
}
}
t.minute=minute+c.minute;
if(t.minute>=60)
{
t.minute=t.minute-60;
t.hour=hour+c.hour+1;
if(t.hour>23)
{
t.hour=t.hour-24;
}
}
t.hour=hour+c.hour;
if(t.hour>23)
{
t.hour=t.hour-24;
}
return t;
}

CTime CTime::operator-=(CTime &c)
{
CTime t;
t.second =second+60*minute+3600*hour;
c.second =c.second+60*c.minute+3600*c.hour;
if(t.second>c.second )
t.second =t.second-c.second ;
else
t.second =c.second -t.second ;
t.hour =t.second /3600;
t.minute =(t.second %3600)/60;
t.second =(t.second %3600)%60;
return t;
}
CTime CTime::operator+=(int s)//返回s秒后的时间
{
CTime c;
c.second=second+s;
if(c.second>59)
{
c.minute=minute+c.second/60;
c.second=c.second%60;
}
else
c.minute=minute;
if(c.minute>59)
{
c.hour=c.minute/60+hour;
c.minute=c.minute%60;
}
else
c.hour=hour;
if(c.hour>23)
{
c.hour=hour%24;
}
return c;
}
CTime CTime::operator-=(int s)//返回s秒前的时间
{
CTime c;
c.second=hour*3600+minute*60+second;
c.second=c.second-s;
c.hour=c.second/3600;
c.minute=(c.second%3600)/60;
c.second=(c.second%3600)%60;
return c;
}
void main()
{
CTime t1(8,20,25),t2(11,20,50),t;
cout<<"t1为：";
t1.display();
cout<<"t2为：";
t2.display();
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.display();
cout<<endl;

t=t1-t2;
cout<<"时间相差：";
t.display ();
cout<<endl;

t=t1+20;
cout<<"t1增加20秒之后为：";
t.display ();
cout<<endl;

t=t1-20;
cout<<"t1增加20秒之前为：";
t.display ();
cout<<endl;

t=(t1+=t2);
cout<<"t1+=t2得：";
t.display ();
cout<<endl;

t=(t1-=t2);
cout<<"t1-=t2得：";
t.display ();
cout<<endl;

t=(t1+=20);
cout<<"t1+=20得：";
t.display ();
cout<<endl;

t=(t1-=20);
cout<<"t1-=20得：";
t.display ();
cout<<endl;

t=++t1;
cout<<"++t1：";
t.display ();
cout<<endl;

t=t1++;
cout<<"t1++：";
t.display ();
cout<<endl;

t=--t1;
cout<<"--t1：";
t.display ();
cout<<endl;

t=t1--;
cout<<"t1--：";
t.display ();
cout<<endl;

system("pause");

}



上机感言：呼，以后多多运用运算符和指针了