在Time类中的运算符重载基础上 （1）定义对时间对象的自增和自减一目运算符
//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
（2）定义Time类中的<<和>>运算符重载，实现时间的输入输出，改造原程序中对运算结果显示方式，使程序读起来更自然。
代码
/* * Copyright (c) 2015, 烟台大学计算机学院 * All rights reserved. * 文件名称：test.cpp * 作 者：辛彬 * 完成日期：2015 年 5 月 8 日 * 版 本 号：v1.0 */;class CTime{private:hour; minute; second; // 秒public:CTime(int h=0,int m=0,int s=0);void setTime(int h,int m,int s);> (CTime &t);bool operator < (CTime &t);bool operator >= (CTime &t);bool operator <= (CTime &t);bool operator == (CTime &t);bool operator != (CTime &t);//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 CTime operator+(CTime &t);CTime operator-(CTime &t);//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//二目赋值运算符的重载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friend ostream& operator<<(ostream&,const CTime&);friend istream& operator>>(istream&,CTime&);};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;}bool CTime::operator>(CTime &t){if(hour>t.hour)return true;else if(hour<t.hour)return false;else if(minute>t.hour)return true;else if(minute<t.minute)return false;else if(second>t.hour)return true;else if(second<t.hour)return false;;}bool CTime::operator<(CTime &t){if(hour<t.hour)return true;else if(hour>t.hour)return false;else if(minute<t.hour)return true;else if(minute>t.minute)return false;else if(second<t.hour)return true;else if(second>t.hour)return false;;}bool CTime::operator>=(CTime &t){return !(*this<t);}bool CTime::operator<=(CTime &t){return !(*this>t);}bool CTime::operator==(CTime &t){if(hour==t.hour&&minute==t.minute&&second==t.second)return true;;}bool CTime::operator!=(CTime &t){return !(*this==t);}CTime CTime::operator+(CTime &t){int h=hour+t.hour;int m=minute+t.minute;int s=second+t.second;if(s>=60){s-=60;m++;}if(m>=60){m-=60;h++;}if(h>=24){h-=24;}CTime c(h,m,s);return c;}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;}CTime CTime::operator+(int s){int ss=s%60;int mm=(s/60)%60;int hh=s/3600;CTime t(hh,mm,ss);return *this+t;}CTime CTime::operator-(int s){int ss=s%60;int mm=(s/60)%60;int hh=s/3600;CTime t(hh,mm,ss);return *this-t;}CTime CTime::operator+=(CTime &t){*this=*this+t;return *this;}CTime CTime::operator-=(CTime &t){*this=*this-t;return *this;}CTime CTime::operator+=(int s){*this=*this+s;return *this;}CTime CTime::operator-=(int s){*this=*this-s;return *this;}CTime CTime::operator++(int){CTime t(*this);*this+=1;return t;}CTime CTime::operator++(){*this+=1;return *this;}CTime CTime::operator–(int){CTime t(*this);*this-=1;return t;}CTime CTime::operator–(){*this-=1;return *this;}ostream& operator<<(ostream& out,const CTime& c){out<<c.hour<<“:”<<c.minute<<“:”<<c.second;return out;}istream& operator>>(istream& in,CTime& c){cout<<“输入时，分，秒:”;in>>c.hour>>c.minute>>c.second;return in;}int main(){CTime t1(8,20,25),t2(11,20,50),t;cout<<“t1为：”<<t1<<endl;cout<<“t2为：”<<t2<<endl;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;t=t1+t2;cout<<“t1+t2=”<<t<<endl;t=t1-t2;cout<<“t1-t2=”<<t<<endl;t=t1+2000;cout<<“t1+2000=”<<t<<endl;t=t1-5000;cout<<“t1-5000=”<<t<<endl;t1+=t2;cout<<“t1+=t2=”<<t1<<endl;t1-=t2;cout<<“t1-=t2=”<<t1<<endl;t1+=2000;cout<<“t1+=2000=”<<t1<<endl;t1-=5000;cout<<“t1-=5000=”<<t1<<endl;cout<<“t1++=”<<t1++<<endl;cout<<“++t1=”<<++t1<<endl;cout<<“t2–=”<<t2–<<endl;cout<<“–t2=”<<–t2<<endl;return 0;}
运行结果
转动心中的期待，血在澎湃，吃苦流汗算什么。
