第八周项目二：Time类的重载

/** 程序的版权和版本声明部分* Copyright (c)2013, 烟台大学计算机学院学生* All rightsreserved.* 文件名称： Time.cpp* 作者：李巧丽* 完成日期：2013 年4月 24日* 版本号： v1.0* 输入描述：无* 问题描述：Time类的运算符重载* 程序输出：*/#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);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，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);};//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(minute>t.minute) {return true;}    else if(second>t.second) {return true;}    else {return false;}}bool CTime::operator < (CTime &t){    if(hour<t.hour) {return true;}    else if(minute<t.minute) {return true;}    else if(second<t.second) {return true;}    else {return false;}}bool CTime::operator >= (CTime &t){    if(hour>=t.hour) {return true;}        else if(minute>=t.minute){return true;}        else if(second>=t.second){return true;}        else {return false;}}bool CTime::operator <= (CTime &t){    if(hour<=t.hour) {return true;}        else if(minute<=t.minute){return true;}        else if(second<=t.second){return true;}        else {return false;}}bool CTime::operator == (CTime &t){    if(hour==t.hour) {return true;}        else if(minute==t.minute){return true;}        else if(second==t.second){return true;}        else {return false;}}bool CTime::operator != (CTime &t){    if(hour!=t.hour) {return true;}        else if(minute!=t.minute){return true;}        else if(second!=t.second){return true;}        else {return false;}}CTime CTime::operator+(CTime &c){    CTime a;    a.hour=hour+c.hour;    a.minute=minute+c.minute;    a.second=second+c.second;    if(a.second>59)    {        a.minute+=a.second/60;        a.second%=60;        if(a.minute>59)        {            a.hour+=a.minute/60;            a.minute%=60;        }        if(a.hour>23)        {            a.hour%=24;        }    }    return a;}CTime CTime::operator-(CTime &c){    CTime a;    a.hour=hour-c.hour;    a.minute=minute-c.minute;    a.second=second-c.second;     if(a.second<0)    {        a.minute+=a.second/60;        a.second%=60;        if(a.minute<0)        {            a.hour+=a.minute/60;            a.minute%=60;        }        if(a.hour<0)        {            a.hour%=24;        }    }    return a;}CTime CTime::operator+(int s){    CTime a;    a.hour=hour;    a.minute=minute;    a.second=second+s;    if(a.second>=60)    {        a.minute+=a.second/60;        a.second%=60;        if(a.minute>59)        {            a.hour+=a.minute/60;            a.minute%=60;        }        if(a.hour>23)        {            a.hour%=24;        }    }    return a;}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;}//一目运算符的重载CTime CTime::operator++(int){    CTime t=*this;    *this=*this+1;    return t;}CTime CTime::operator++(){    *this=*this+1;    return *this;}CTime CTime::operator--(int){    CTime t=*this;    *this=*this-1;    return t;}CTime CTime::operator--(){    *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(8 , 20 , 25),t2(11 , 30 , 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;//下面自行设计对其他运算符的重载的测试    t1.display();    t2.display();    cout<<"两个时间相加为："<<endl;    t=t1+t2;    t.display();    t=t1++;    cout<<"t1++=";    t.display();    t=++t1;    cout<<"++t1=";    t.display();    t1--;    cout<<"t1--=";    t1.display();    --t1;    cout<<"--t1=";    t1.display();    cout<<"t1-=t2=";    t1.display();    return 0;}

运行结果: