程序代码:
#include <iostream>
using namespace std;
class CTime//时间类
{
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);//构造函数
void setTime(int h,int m,int s);//设置时间
//重载>>实现输入时间
friend istream& operator >>(istream& input, CTime& c);
//重载<<实现输出时间
friend ostream& operator <<(ostream& output, CTime& c);
//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，前置与后置返回值不一样
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);
CTime operator-=(int s);
};
//初始化时间
CTime::CTime(int h, int m, int s)
{
hour = h;
minute = m;
second = s;
}
//初始化时间
void CTime::setTime(int h,int m,int s)
{
hour = h;
minute = m;
second = s;
}
//重载>>实现输入时间
istream& operator >>(istream& input, CTime& c)
{
char ch1, ch2;//保存时和分、分和秒之间的冒号
do
{
input>>c.hour>>ch1>>c.minute>>ch2>>c.second;
}while(!(':' == ch1 && ':' == ch2));
return input;
}
//重载<<实现输出时间
ostream& operator <<(ostream& output, CTime& c)
{
output<<c.hour<<':'<<c.minute<<':'<<c.second<<endl;
return output;
}
//比较运算符(二目)的重载
bool CTime::operator > (CTime &t)
{
//计算时间为多少秒
int sec1 = hour * 3600 + minute * 60 + second;
int sec2 = t.hour * 3600 + t.minute * 60 + t.second;
if(sec1 > sec2)
{
return true;
}
else
{
return false;
}
}
bool CTime::operator < (CTime &t)
{
//计算时间为多少秒
int sec1 = hour * 3600 + minute * 60 + second;
int sec2 = t.hour * 3600 + t.minute * 60 + t.second;
if(sec1 < sec2)
{
return true;
}
else
{
return false;
}
}
bool CTime::operator >= (CTime &t)
{
//计算时间为多少秒
int sec1 = hour * 3600 + minute * 60 + second;
int sec2 = t.hour * 3600 + t.minute * 60 + t.second;
if(sec1 >= sec2)
{
return true;
}
else
{
return false;
}
}
bool CTime::operator <= (CTime &t)
{
//计算时间为多少秒
int sec1 = hour * 3600 + minute * 60 + second;
int sec2 = t.hour * 3600 + t.minute * 60 + t.second;
if(sec1 <= sec2)
{
return true;
}
else
{
return false;
}
}
bool CTime::operator == (CTime &t)
{
//计算时间为多少秒
int sec1 = hour * 3600 + minute * 60 + second;
int sec2 = t.hour * 3600 + t.minute * 60 + t.second;
if(sec1 == sec2)
{
return true;
}
else
{
return false;
}
}
bool CTime::operator != (CTime &t)
{
//计算时间为多少秒
int sec1 = hour * 3600 + minute * 60 + second;
int sec2 = t.hour * 3600 + t.minute * 60 + t.second;
if(sec1 != sec2)
{
return true;
}
else
{
return false;
}
}
//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
{
//将时间化成秒数
int sec1 = hour * 3600 + minute * 60 + second;
int sec2 = c.hour * 3600 + c.minute * 60 + c.second;
//两个时间相加
int sec3 = sec1 + sec2;
CTime t1;
t1.hour = sec3 / 3600;//计算时间(时)
t1.minute = sec3 % 3600 / 60;//计算时间(分)
t1.second = sec3 % 3600 % 60;//计算时间(秒)
return t1;
}
CTime CTime::operator-(CTime &c)//对照+理解
{
//将时间化成秒数
int sec1 = hour * 3600 + minute * 60 + second;
int sec2 = c.hour * 3600 + c.minute * 60 + c.second;
//两个时间相减
int sec3 = sec1 - sec2;
CTime t1;
t1.hour = sec3 / 3600;//计算时间(时)
t1.minute = sec3 % 3600 / 60;//计算时间(分)
t1.second = sec3 % 3600 % 60;//计算时间(秒)
return t1;
}
CTime CTime::operator+(int s)//返回s秒后的时间
{
CTime t;
//将时间化成秒数
int sec1 = hour * 3600 + minute * 60 + second;
//计算增加s秒后的时间
int sec2 = sec1 + s;
t.hour = sec2 / 3600;//计算时间(时)
t.minute = sec2 % 3600 / 60;//计算时间(分)
t.second = sec2 % 3600 % 60;//计算时间(秒)
return t;
}
CTime CTime::operator-(int s)//返回s秒前的时间
{
CTime t;
//将时间化成秒数
int sec1 = hour * 3600 + minute * 60 + second;
//计算减少s秒后的时间
int sec2 = sec1 - s;
t.hour = sec2 / 3600;//计算时间(时)
t.minute = sec2 % 3600 / 60;//计算时间(分)
t.second = sec2 % 3600 % 60;//计算时间(秒)
return t;
}
//一目运算符的重载
CTime CTime::operator++( int)//后置++，如i++
{
CTime t = *this;
*this = *this + 1;
return t;
}
CTime CTime::operator++()//前置++, 如++i;
{
*this = *this + 1;
return *this;
}
CTime CTime::operator--( int)//后置--, 如i--
{
CTime t = *this;
*this = *this + 1;
return t;
}
CTime CTime::operator--()//前置--, 如--i
{
*this = *this - 1;
return *this;
}
//两个时间相加(this是指向Time类的指针)
CTime CTime::operator+=(CTime &c)
{
*this = *this + c;
return *this;
}
//两个时间相减(this是指向Time类的指针)
CTime CTime::operator-=(CTime &c)
{
*this = *this - c;
return *this;
}
//增加s秒
CTime CTime::operator+=(int s)
{
//将时间化成秒数
int sec1 = hour * 3600 + minute * 60 + second;
//计算增加s秒后的时间
int sec2 = sec1 + s;
CTime t1;
t1.hour = sec2 / 3600;//计算时间(时)
t1.minute = sec2 % 3600 / 60;//计算时间(分)
t1.second = sec2 % 3600 % 60;//计算时间(秒)
return t1;
}
//减少s秒
CTime CTime::operator-=(int s)
{
//将时间化成秒数
int sec1 = hour * 3600 + minute * 60 + second;
//计算增加s秒后的时间
int sec2 = sec1 - s;
CTime t1;
t1.hour = sec2 / 3600;//计算时间(时)
t1.minute = sec2 % 3600 / 60;//计算时间(分)
t1.second = sec2 % 3600 % 60;//计算时间(秒)
return t1;
}
void main()
{
//定义三个时间对象
CTime t1, t2, t;
cout<<"请输入第一个时间:";
cin>>t1;
cout<<"请输入第二个时间:";
cin>>t2;
//显示第一个时间
cout<<"t1 = ";
cout<<t1;
//显示第二个时间
cout<<"t2 = ";
cout<<t2;
cout<<"\n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;
//两个时间相加
cout<<"t1 + t2 = ";
t = t1 + t2;
cout<<t;
//两个时间相减
cout<<"t1 - t2 = ";
t = t1 - t2;
cout<<t;
//计算t1增加300秒后的时间
cout<<"t1 + 300秒 = ";
t = t1 + 300;
cout<<t;
//计算t1减少300秒后的时间
cout<<"t1 - 300秒 = ";
t = t1 - 300;
cout<<t;
cout<<endl;
cout<<"t1 = ";
cout<<t1;
//计算t1++
cout<<"t1++ = ";
t = t1++;
cout<<t;
cout<<endl;
cout<<"t1 = ";
cout<<t1;
//计算++t1
cout<<"++t1 = ";
t = ++t1;
cout<<t;
cout<<endl;
cout<<"t1 = ";
cout<<t1;
//计算t1--
cout<<"t1-- = ";
t = t1--;
cout<<t;
cout<<endl;
cout<<"t1 = ";
cout<<t1;
//计算--t1
cout<<"--t1 = ";
t = --t1;
cout<<t;
cout<<endl;
cout<<"t2 = ";
cout<<t2;
cout<<"t = ";
cout<<t;
t2 += t;
cout<<"执行 t2 += t1 后 t2 = ";
cout<<t2;
cout<<endl;
cout<<"t2 = ";
cout<<t2;
cout<<"t = ";
cout<<t;
t2 -= t;
cout<<"执行 t2 -= t1 后 t2 = ";
cout<<t2;
cout<<endl;
system("pause");
}
执行结果:
在CTime类中重载<<和>>,布布扣,bubuko.com
原文：http://blog.csdn.net/u010105970/article/details/31745291
