*All right reserved.
*文件名称:test.cpp
*作 者:韩双志
*完成日期:2016年5月24日
*版本号:v1.0
*
*问题描述:实现Time类中的运算符重载;
*输入描述:输入两个时间格式为时:分:秒
*输出描述:输出比较后的时间
/*
#include
using namespace std;
class CTime
{
public:
CTime(int h=0,int m=0,int s=0);
void setTime(int h,int m,int s);
friend istream &operator>>(istream &in,CTime &t);//输入输出运算符重载
friend ostream &operator<<(ostream &out,CTime t);
bool operator>(CTime &t);//二目运算符重重载
bool operator<(CTime &t);
bool operator>=(CTime &t);
bool operator<=(CTime &t);
bool operator!=(CTime &t);
bool operator == (CTime &t);
CTime operator+(CTime &t);
CTime operator-(CTime &t);
CTime operator+(int s);
CTime operator-(int s);
CTime operator++(int);//一目运算符重载
CTime &operator++();//前置,下一秒
CTime operator--(int );//后置,前一秒
CTime &operator--();
CTime &operator+=(CTime &c);
CTime &operator-=(CTime &c);
CTime &operator+=(int s);
CTime &operator-=(int s);
private:
unsigned short int hour;//时
unsigned short int minute;//f分
unsigned short int second;//秒
};
CTime::CTime(int h,int m,int s)//构造函数
{
hour=h;
minute=m;
second=s;
}
void CTime::setTime(int h,int m,int s)//设置时间
{
hour=h;
minute=m;
second=s;
}
istream &operator>>(istream &in,CTime &t)//冲在输入运算符
{
char ch1,ch2;
while(1)
{
cout<<"请输入时间"<
if (ch1==':' && ch2==':')
if (t.hour>-1 && t.hour<24 && t.minute>-1 && t.minute<60 && t.second>-1 && t.second<60) break;
cerr<<"时间格式不正确! 请重新输入\n";
}
return cin;
}
ostream &operator<<(ostream &out,CTime t)//重载输出运算符
{
out<
}
//判断时间
bool CTime::operator>(CTime &t)
{
if (hour>t.hour) return true;
if (hour
if (minute
return false;
}
bool CTime::operator < (CTime &t)// 判断时间t1
if (hour
if (minute
if (second
}
bool CTime::operator == (CTime &t)// 判断时间t1==t2
{
if (*this
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
}
bool CTime::operator <= (CTime &t) // 判断时间t1<=t2
{
if (*this>t) return false;
return true;
}
//一目运算符重载
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++;
}
while (h>23) h-=24;
CTime t0(h,m,s);
return t0;
}
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;
}
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--;
}
while (h<0) h+=24;
CTime t0(h,m,s);
return t0;
}
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;
}
//一目运算符的重载
CTime CTime::operator++(int)//后置++,下一秒
{
CTime t=*this;
*this=*this+1;
return t;
}
CTime &CTime::operator--()//前置--,前一秒
{
*this=*this-1;
return *this;
}
//赋值运算符的重载
CTime &CTime::operator+=(CTime &c)
{
*this=*this+c;
return *this;
}
CTime &CTime::operator-=(CTime &c)
{
*this=*this-c;
return *this;
}
CTime &CTime::operator+=(int s)//返回s秒后的时间
{
*this=*this+s;
return *this;
}
CTime &CTime::operator-=(int s)//返回s秒前的时间
{
*this=*this-s;
return *this;
}
int main()
{
CTime t1,t2,t;
cout<<"t1为:"; cout<<"t=t1++"< */ 知识点结构: 运算符重载 学习心得: 学会了输入输出运算符重载,二目运算符的重载,
cin>>t1;
cout<<"t2为:";
cin>>t2;
cout<<"下面比较两个时间大小:\n";
if (t1>t2) cout<<"t1>t2"<
cout<<"t= "<
cout<<"t= "<
}
运行结果: