第八周 项目2-Time类中的运算符重载

/**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 rights reserved.*文件名称：*作者：尚振伟*完成日期：2014年4月15日*版本号：v0.1*对任务及求解方法的描述部分：*输入描述：无*问题描述:实现Time类中的运算符重载*程序输入：*程序输出：*问题分析：*算法设计：*我的程序：*/#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)    {        hour=h;        minute=m;        second=s;    }    void setTime(int h,int m,int s);    void display();    //二目的比较运算符重载    bool operator > (CTime &t);    bool operator < (CTime &t);    bool operator >= (CTime &t);    bool operator <= (CTime &t);    bool operator == (CTime &t);    bool operator != (CTime &t);    //二目的加减运算符的重载    //返回t规定的时、分、秒后的时间，例t1(8,20,25),t2(11,20,50)，t1+t2为:41:15    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};void CTime::setTime(int h,int m,int s){    hour=h;    minute=m;    second=s;}//下面实现所有的运算符重载代码。bool CTime::operator>(CTime &t){    if(hour>t.hour)    {        return true;    }    if(hour==t.hour)    {        if(minute>t.minute)        {            return true;        }    }    if(hour==t.hour&&minute==t.minute)    {        if(second>t.second)        {            return true;        }    }    else    {        return false;    }}bool CTime::operator<(CTime &t){    if(hour<t.hour)    {        return true;    }    if(hour==t.hour)    {        if(minute<t.minute)        {            return true;        }    }    if(hour==t.hour&&minute==t.minute)    {        if(second<t.second)        {            return true;        }    }    else    {        return false;    }}bool CTime::operator>=(CTime &t){    if(!(*this<t))    {        return true;    }    else    {        return false;    }}bool CTime::operator <= (CTime &t){    if(!(*this>t))    {        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(hour!=t.hour||minute!=t.minute||second!=t.second)    {        return true;    }    else    {        return false;    }}CTime CTime::operator+(CTime &t){    int h,m,s;    h=hour+t.hour;    m=minute+t.minute;    s=second+t.second;    while(s>=60)    {        s-=60;        m+=1;    }    while(m>=60)    {        m-=60;        h+=1;    }    while(h>=24)    {        h-=24;    }    CTime t1(h,m,s);    return t1;}CTime CTime::operator-(CTime &t){    int h,m,s;    h=hour-t.hour;    m=minute-t.minute;    s=second-t.second;    while(s<0)    {        s+=60;        m-=1;    }    while(m<0)    {        m+=60;        h-=1;    }    while(h<0)    {        h+=24;    }    CTime t1(h,m,s);    return t1;}CTime CTime::operator+(int s){    int h,m,s1;    s1=s%60;    m=(s/60)%60;    h=s/3600;    CTime t1(h,m,s1);    return *this+t1;}CTime CTime::operator-(int s){    int h1,m1,s1;    s1=s%60;    m1=(s/60)%60;    h1=s/3600;    CTime t1(h1,m1,s1);    return *this-t1;}CTime CTime::operator+=(CTime &c){    hour+=c.hour;    minute+=c.minute;    second+=c.second;    while(second>=60)    {        second-=60;        minute+=1;    }    while(minute>=60)    {        minute-=60;        hour+=1;    }    while(hour>=24)    {        hour-=24;    }    CTime t1(hour,minute,second);    return t1;}CTime CTime::operator-=(CTime &c){    *this=*this-c;    return *this;}CTime CTime::operator+=(int s){    second+=s;    while(second>60)    {        second-=60;        minute++;        while(minute>60)        {            minute-=60;            hour++;            while(hour>24)            {                hour-=24;            }        }    }    return CTime(hour,minute,second);}CTime CTime::operator-=(int s){    *this=*this-s;    return *this;}void CTime::display(){    cout<<hour<<":"<<minute<<":"<<second<<endl;}//自行编制用于测试的main()函数，有些结果不必依赖display()函数，提倡用单步执行查看结果int main(){    CTime t1(8,20,25),t2(11,20,50),t;    cout<<"t1=";    t1.display();    cout<<"t2=";    t2.display();    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;    t=t1+t2;    t.display();    t=t1-t2;    t.display();    t=t1+6000;    t.display();    t=t1-600;    t.display();    t1+=t2;    t1.display();    t1-=t2;    t1.display();    t1+=1200;    t1.display();    t1-=600;    t1.display();    return 0;}

结果展示：

心得体会：唉，被这道题困惑了一下午，刚开始思路什么都特别清晰，就是运行结果不对，越改越乱，今天要是不把它整出来，估计今夜要失眠。。。。。。。