/*
* 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: 1.cpp
* 作者:王俊
* 完成日期: 2013年 5 月 08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 &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
friend istream& operator>>(istream& in,CTime& c);
friend ostream& operator<<(ostream& out,CTime& c);
};
//构造函数
CTime::CTime(int h,int m,int s)
{
hour=h;
minute=m;
second=s;
}
// 设置时间
void CTime::setTime(int h,int m,int s)
{
hour=h;
minute=m;
second=s;
}
//显示时间
void CTime::display()
{
cout<<hour<<':'<<minute<<':'<<second<<endl;
}
//比较运算符的重载
bool CTime::operator > (CTime &t) // 判断时间t1>t2
{
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)// 判断时间t1<t2
{
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)// 判断时间t1==t2
{
if (*this<t || *this>t) return false;
return true;
}
bool CTime::operator != (CTime &t) // 判断时间t1!=t2
{
if (*this==t) return false;
return true;
}
bool CTime::operator >= (CTime &t)// 判断时间t1>=t2
{
if (*this<t) return false;
return true;
}
bool CTime::operator <= (CTime &t) // 判断时间t1<=t2
{
if (*this>t) return false;
return true;
}
//二目运算符的重载
// 计算时间之和, 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 CTime::operator + (CTime &t)
{
int h,m,s;
s=second+t.second;
m=minute+t.minute;
h=hour+t.hour;
if (s>59)
{
s-=60;
m++;
}
if (m>59)
{
m-=60;
h++;
}
if (h>23) h-=24;
CTime t0(h,m,s);
return t0;
}
//返回s秒后的时间
CTime CTime::operator+(int s)
{
int ss=s%60;
int mm=(s/60)%60;
int hh=s/3600;
CTime t0(hh,mm,ss);
return *this+t0;
}
// 计算时间之差
CTime CTime::operator - (CTime &t)
{
int h,m,s;
s=second-t.second;
m=minute-t.minute;
h=hour-t.hour;
if (s<0)
{
s+=60;
m--;
}
if (m<0)
{
m+=60;
h--;
}
if (h<0) h+=24;
CTime t0(h,m,s);
return t0;
}
//返回s秒前的时间
CTime CTime::operator-(int s)
{
int ss=s%60;
int mm=(s/60)%60;
int hh=s/3600;
CTime t0(hh,mm,ss);
return *this-t0;
}
istream& operator>>(istream &in,CTime& c)
{
in>>c.hour>>c.minute>>c.second;
return in;
}
ostream& operator<<(ostream &out,CTime& c)
{
out<<c.hour<<":"<<c.minute<<":"<<c.second<<endl;
return out ;
}
int main()
{
CTime t1,t2,t;
cin>>t1>>t2;
cout<<"t1为:";
cout<<t1;
cout<<"t2为:";
cout<<t2;;
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;
return 0;
}
运行结果: