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第八周实验报告(二)实现Time类中的运算符重载,并对运算符的重载进行测试

2012-04-16 17:24 736 查看
/* (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 rightsreserved.

* 文件名称:实现Time类中的运算符重载,并对运算符的重载进行测试 

* 作    者:      
晁阳                      

* 完成日期:     2012   年 04  月  16日

* 版本号:      T1.0   

* 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>
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
};
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<<endl;
}
//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
//比较运算符(二目)的重载
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)
{
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 t;
t.hour =hour+c.hour ;
t.minute =minute+c.minute ;
t.second =second +c.second ;
if (t.second >59)
{
t.minute=(t.minute +t.second/60); //增加sec/60分钟
if (t.minute>59)
{
t.hour=(t.hour+t.minute/60);
if (t.hour>23)
t.hour=(t.hour %24);
t.minute=(t.minute %60);
}
t.second=(t.second %60); //秒数应该是sec%=60
}
if (t.minute>59)
{
t.hour=(t.hour +t.minute/60);
if (t.hour>23)
t.hour=(t.hour %24);
t.minute=(t.minute %60);
}
if (t.hour>23)
t.hour=(t.hour %24);
return t;
}
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
{
CTime t;

t.hour =hour;
t.minute =minute ;
t.second =second ;
t.second =(t.second +s);
if (t.second >59)
{
t.minute+=t.second/60; //增加sec/60分钟
if (t.minute>59)
{
t.hour+=t.minute/60;
if (t.hour>23)
t.hour%=24;
t.minute%=60;
}
t.second%=60; //秒数应该是sec%=60
}
else if (t.minute>59)
{
t.hour+=t.minute/60;
if (t.hour>23)
t.hour%=24;
t.minute%=60;
}
else if (t.hour>23)
t.hour%=24;
return t;
}
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)
{
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+=(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
{
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;
}
void main()
{
CTime t1(8,20,25),t2(11,20,50),t;
int n;
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;
cout<<"t1+t2的时间为:";
t=t1+t2;
t.display();
cout<<"t2-t1的时间为:";
t=t2-t1;
t.display();
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:";
t.display ();
t=t1-n;
cout<<"增加"<<n<<"秒前的时间为:";
t.display ();
cout<<endl;
cout<<"对t1后置++,结果为:";
t=t1++;
t.display ();
cout<<"运算结束后,t1的值为:";
t1.display ();
cout<<endl;
cout<<"对t1前置++,结果为:";
t=++t1;
t.display ();
cout<<"运算结束后,t1的值为:";
t1.display ();
cout<<endl;
cout<<"对t1后置--,结果为:";
t=t1--;
t.display ();
cout<<"运算结束后,t1的值为:";
t1.display ();
cout<<endl;
cout<<"对t1前置--,结果为:";
t=--t1;
t.display ();
cout<<"运算结束后,t1的值为:";
t1.display ();
cout<<endl;
cout<<"运算t1+=t2的结果为:";
t1+=t2;
t1.display ();
cout<<endl;
cout<<"此时t1的值为:";
t1.display ();
cout<<"此时t2的值为:";
t2.display ();
cout<<endl;
cout<<"运算t1-=t2的结果为:";
t1-=t2;
t1.display ();
cout<<"此时t1的值为:";
t1.display ();
cout<<"此时t2的值为:";
t2.display ();
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:";
t1.display ();
cout<<"t2增加"<<n<<"秒前的时间为:";
t2-=n;
t2.display ();
cout<<endl;
system("PAUSE");
}


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