/* (程序头部注释开始)* 程序的版权和版本声明部分* Copyright (c) 2011, 烟台大学计算机学院学生 * All rights reserved.* 文件名称: * 作 者: 李腾 * 完成日期: 2012 年 4 月 10 日* 版 本 号: * 对任务及求解方法的描述部分* 输入描述: * 问题描述:实现Time类中运算符的重载 * 程序输出: * 程序头部的注释结束*/#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:41:15CTime 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};//下面实现所有的运算符重载代码。//为简化编程,请注意通过调用已有函数,利用好各函数之间的关系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; } bool CTime::operator >(CTime &t){if(hour>t.hour){return true;}else if(hour<t.hour){return false;}elseif(minute>t.minute){return true;}else if(minute<t.minute){return false;}elseif(second>t.second){return true;}else{return false;}}bool CTime::operator <(CTime &t){if(hour<t.hour){return true;}else if(hour>t.hour){return false;}elseif(minute<t.minute){return true;}else if(minute>t.minute){return false;}elseif(second<t.second){return true;}else{return false;}}bool CTime::operator >=(CTime &t){if(hour>t.hour){return true;}else if(hour<t.hour){return false;}elseif(minute>t.minute){return true;}else if(minute<t.minute){return false;}elseif(second>=t.second){return true;}else{return false;}}bool CTime::operator <=(CTime &t){if(hour<t.hour){return true;}else if(hour>t.hour){return false;}elseif(minute<t.minute){return true;}else if(minute>t.minute){return false;}elseif(second<=t.second){return true;}else{return false;}}bool CTime::operator ==(CTime &t){if(hour==t.hour && minute==t.minute && second==t.second){return true;}else{return false;}}bool CTime::operator !=(CTime &t){if (*this==t) return false; return true; }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; } CTime CTime::operator++(int)//后置++,下一秒 { CTime t=*this; *this=*this+1; return t; } CTime CTime::operator++()//前置++,下一秒 { *this=*this+1; return *this; } CTime CTime::operator--(int)//后置--,前一秒 { CTime t=*this; *this=*this-1; return t; } CTime CTime::operator--()//前置--,前一秒 { *this=*this-1; return *this; } 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; //在测试下面的代码时,采用单步执行的方法跟踪 t=t1++; t=++t1; t1--; --t1; t=t1+t2; t=t1-t2; t=t1+2000; t=t1-5000; t1+=t2; t1-=t2; t1+=2000; t1-=5000; system("pause"); return 0; }
感悟:bool CTime::operator !=(CTime &t){if(hour!=t.hour && minute!=t.minute && second!=t.second){return true;}else{return false;}}为什么这个不好使呢??
2.不敢说自己都已经掌握但是了解更多,自己又进了一步,不敢想一步追上前面的同学,但是希望自己每天都有进步!!总有一天我会赶上甚至超过。