输入代码:
/* *Copyright (c)2015,烟台大学计算机与控制工程学院 *All rights reserved. *文件名称:sum123.cpp *作 者:林海云 *完成日期:2015年5月13日 *版 本 号:v2.0 * *问题描述: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 (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。 *程序输入:规定的两个时间点 *程序输出:分别完成两个时间的运算符操作和重载,并输出 */ #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); //输入输出运算的重载 friend istream &operator>>(istream &in,CTime &t); friend ostream &operator<<(ostream &out,CTime t); //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 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; } istream &operator>>(istream &in,CTime &t) { char ch1,ch2; while(1) { cout<<"请输入时间(hh:mm:ss)"; cin>>t.hour>>ch1>>t.minute>>ch2>>t.second; if((ch1==':')&&(ch2==':')) break; else cout<<"输入格式错误"<<endl; if(t.hour>-1&&t.hour<24&&t.minute>-1&&t.minute<60&&t.second>-1&&t.second<60) break; else cout<<"输入时间形式错误,请重新输入"<<endl; } return cin; } //重新输出运算符 ostream &operator<<(ostream &out,CTime t) { out<<t.hour<<':'<<t.minute<<':'<<t.second<<endl; return out; } bool CTime::operator > (CTime &t) { 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; else return false; } bool CTime::operator < (CTime &t) { 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; else return false; } bool CTime::operator >= (CTime &t) { if(*this<t) return false; else return true; } bool CTime::operator <= (CTime &t) { if(*this>t) return false; else return true; } bool CTime::operator == (CTime &t) { if(*this>t||*this<t) return false; else return true; } bool CTime::operator != (CTime &t) { if(*this==t) return false; else return true; } CTime CTime:: operator+(CTime &t) { int h,m,s; h=hour+t.hour; m=minute+t.minute; s=second+t.second; if(s>60) { s-=60; m++; } if(m>60) { m-=60; h++; } if(h>23) { h-=24; } CTime t0(h,m,s); return t0; } CTime CTime::operator-(CTime &t) { int h,m,s; h=hour-t.hour; m=minute-t.minute; s=second-t.second; if(s<0) { m--; s+=60; } if(m<0) { h--; m+=60; } if(h<0) { h+=24; } CTime t0(h,m,s); return t0; } CTime CTime:: operator+(int s) { int hh,mm,ss; ss=s%60; mm=(s/60)%60; hh=s/3600; CTime t0(hh,mm,ss); return *this+t0; } CTime CTime:: operator-(int s) { int hh,mm,ss; ss=s%60; mm=(s/60)%60; 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++ { CTime t=*this; *this=*this+1; return t; } CTime CTime:: operator--(int)//后置-- { CTime t=*this; *this=*this-1; return t; } CTime CTime:: operator++()//前置++ { *this=*this+1; return *this; } CTime CTime:: operator--()//前置-- { *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) { *this=*this+s; return *this; } CTime CTime:: operator-=(int s) { *this=*this-s; return *this; } int main() { CTime t1,t2,t; cout<<"t1为:"; 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"<<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= "<<t1<<endl; cout<<"t2= "<<t2<<endl; cout<<"t=t1++"<<endl; t=t1++; cout<<"t= "<<t<<" t1= "<<t1<<endl; cout<<"t=++t1"<<endl; t=++t1; cout<<"t= "<<t<<" t1= "<<t1<<endl; cout<<"t1+t2= "<<t1+t2<<endl; cout<<"t1-t2= "<<t1-t2<<endl; cout<<"t1+2000= "<<t1+2000<<endl; cout<<"t1-5000= "<<t1-5000<<endl; return 0; }
运行结果:
原文地址:http://blog.csdn.net/linhaiyun_ytdx/article/details/45688863