输入代码:
/* * Copyright (c) 2015, 烟台大学计算机学院 * All rights reserved. * 文件名称:sum123.cpp * 作 者:林海云 * 完成日期:2015年4月28日 * 版 本 号:v2.0 * * 问题描述: 实现time类的重载运算符的各项运算 * 输入描述:无 * 程序输出:各项运算的结果 */ #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(); //比较运算重载的函数定义 bool operator > (CTime &t); bool operator < (CTime &t); bool operator >= (CTime &t); bool operator <= (CTime &t); bool operator == (CTime &t); bool operator != (CTime &t); //二目运算函数的定义 CTime operator+(CTime &t); CTime operator-(CTime &t); CTime operator+(int s);//返回s秒后的时间 CTime operator-(int s);//返回s秒前的时间 //二目赋值运算符函数的定义 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; } void CTime::display() { cout<<hour<<":"<<minute<<":"<<second<<endl; } //比较运算符重载 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 ; if(second<t.second)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 ; if(second>t.second)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; } //二目运算符的重载 CTime CTime:: operator+(CTime &t)// 计算时间之和 { int h,m,s; s=second+t.second; m=minute+t.minute; h=hour+t.hour; if(s>59) { 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)// 计算时间之差 { 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)//返回s秒后的时间 { int ss=s%60; int mm=(s/60)%60; int hh=s/3600; CTime t0(hh,mm,ss); return *this-t0; } CTime CTime::operator-(int s)//返回s秒前的时间 { int ss=s%60; int mm=(s/60)%60; int hh=s/3600; CTime t0(hh,mm,ss); return *this-t0; } //可以直接使用已经重载了的加减运算实现 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(8,20,25),t2(11,20,50),t; cout<<"t1为:"; t1.display(); cout<<"t2为:"; t2.display(); 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; t.display(); t=t1-t2; t.display(); t=t1+2000; t.display(); t=t1-5000; t.display(); t1+=t2; t1.display(); t1-=t2; t1.display(); t1+=2000; t1.display(); t1-=5000; t1.display(); return 0; }
运行结果:
原文地址:http://blog.csdn.net/linhaiyun_ytdx/article/details/45333763