2015年大一下第7周项目2-Time类中的运算符重载（续）

/**Copyright (c) 2014,烟台大学计算机学院*All rights reserved.*文件名称:Annpion.cpp*作者:王耀鹏*完成日期:2015年4月30日*版本号:v1.0**问题描述:实现Time类中的运算符重载。定义对时间对象的自增和自减一目运算符，定义Time类中的<<和>>运算符重载*输入描述:无。*输出描述:Time类之间的比较，时间的增加与减少。重载输入输出，使程序看起来更自然。*/#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();    //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19:41:15    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    //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    //输入输出运算的重载    friend istream &operator>>(istream &in,CTime &t);    friend ostream &operator<<(ostream &out,CTime t);};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 hour>t.hour;    else if(minute!=t.minute)        return minute>t.minute;    else return second>t.second;}bool CTime::operator < (CTime &t){    if(hour!=t.hour)        return hour<t.hour;    else if(minute!=t.minute)        return minute<t.minute;    else return second<t.second;}bool CTime::operator >= (CTime &t){    return !(*this < t);}bool CTime::operator <= (CTime &t){    return !(*this > t);}bool CTime::operator == (CTime &t){    return !(*this < t||*this > t);}bool CTime::operator != (CTime &t){    return !(*this == t);}CTime CTime::operator+(CTime &t){    int h,m,s;    h=hour+t.hour;    m=minute+t.minute;    s=second+t.second;    if(s>59)    {        s-=60;        m++;    }    if(m>59)    {        m-=60;        h++;    }    if(h>23)    {        h-=24;    }    CTime time(h,m,s);    return time;}CTime CTime::operator-(CTime &t){    int h,m,s;    h=hour-t.hour;    m=minute-t.minute;    s=second-t.second;    if(s<0)    {        s+=60;        m--;    }    if(m<0)    {        m+=60;        h--;    }    if(h<0)    {        h+=24;    }    CTime time(h,m,s);    return time;}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 s){   int h,m,sec;    sec=second-s;    m=minute;    h=hour;    while(sec<0)    {        sec+=60;        m--;        if(m<0)        {            m+=60;            h--;        }        if(h<0)            h+=24;    }    CTime time(h,m,sec);    return time;}CTime CTime::operator+=(CTime &c){    *this=*this+c;    return *this;}CTime CTime::operator-=(CTime &c){    *this=*this-c;    return *this-c;}CTime CTime::operator+=(int s){    *this=*this+s;    return *this;}CTime CTime::operator-=(int s){    *this=*this-s;    return *this;}CTime CTime::operator++(int){    CTime temp(*this);    *this+=1;    return temp;}CTime CTime::operator++(){    *this+=1;    return *this;}CTime CTime::operator--(int){        CTime temp(*this);    *this-=1;    return temp;}CTime CTime::operator--(){    *this-=1;    return *this;}istream &operator>>(istream &in,CTime &t){    char c1,c2;    int h,m,s;    do    {        cout<<"请输入时间(hh:mm:ss): ";        in>>h>>c1>>m>>c2>>s;    }while(!((h<24&&h>=0)||(c1!=':'||(m<60&&m>=0)||(c2!=':')||(s<60&&s>=0))));    t.hour=h;    t.minute=m;    t.second=s;    return in;}ostream &operator<<(ostream &out,CTime t){    out<<t.hour<<":"<<t.minute<<":"<<t.second;    return out;}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;}

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