九.2

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/** 程序的版权和版本声明部分:* Copyright (c) 2013, 烟台大学计算机学院* All rights reserved.* 文件名称:test.cpp* 作    者:cxz* 完成日期:2014年 4月 22日* 输入描述:* 程序输出:* 问题分析:略* 算法设计:略*/#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    //比较运算返回的是比较结果,是bool型的true或false    //    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    //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    //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};//构造函数...CTime::CTime(int h,int m,int s){    hour=h;    minute=m;    second=s;}//设置时间void CTime::setTime(int h,int m,int s){    hour=h;    minute=m;    second=s;}//显示时间void CTime::display(){    cout<<hour<<":"<<minute<<":"<<second<<endl;}//比较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;    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;    return false;}bool CTime::operator == (CTime &t)// 判断时间t1==t2{    if (*this < t || *this > t) return false;    return true;}bool CTime::operator != (CTime &t) // 判断时间t1!=t2{    if (*this == t) return false;    return true;}bool CTime::operator >= (CTime &t)// 判断时间t1>=t2{    if (*this < t) return false;    return true;}bool CTime::operator <= (CTime &t) // 判断时间t1<=t2{    if (*this > t) return false;    return true;}//下面实现所有的运算符重载代码。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++;    }    if (h>23) h-=24;    CTime t0(h,m,s);    return 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--;    }    if (h<0) h+=24;    CTime t0(h,m,s);    return t0;}//返回秒后的时间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 ss=s%60;    int mm=(s/60)%60;    int hh=s/3600;    CTime t0(hh,mm,ss);    return *this-t0;}//二目赋值运算符的重载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;}//一目运算符的重载CTime CTime::operator++(int)//后置++,下一秒{    CTime t0(*this);    second++;    if(second>59)    {        minute++;        second-=60;    }    if(minute>59)    {        hour++;        minute-=60;    }    if(hour>23)    {        hour-=24;    }    return t0;}CTime CTime::operator++()//前置++,下一秒,前置与后置返回值不一样{    ++second;    if(second>59)    {        minute++;;        second-=60;    }    if(minute>59)    {        hour++;        minute-=60;    }    if(hour>23)    {        hour-=24;    }    return *this;}CTime CTime::operator--( int)//后置--,前一秒{    CTime t0(*this);    second--;    if(second<0)    {        second+=60;        minute--;    }    if(minute<0)    {        minute+=60;        hour--;    }    if(hour<0)    {        hour+=24;    }    return t0;}CTime CTime::operator--()//前置--,前一秒{    --second;    if(second<0)    {        second+=60;        minute--;    }    if(minute<0)    {        minute+=60;        hour--;    }    if(hour<0)    {        hour+=24;    }    return *this;}//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,t3,t4,t5,t6;    int a,b,c,s1,s2;    char m1,m2;    cout<<"t1:"<<endl;    t1.display();    cout<<"输入时间 t2:"<<endl;    while(1)    {        cin>>a>>m1>>b>>m2>>c;        if(a>24||a<0||b>60||b<0||c>60||c<0)            cout<<"输入时间不对!重新输入:"<<endl;        else if(m1!=':'||m2!=':')            cout<<"时间格式不对!重新输入:"<<endl;        else            break;    }    t2.setTime(a,b,c);    cout<<"t2: "<<endl;    t2.display();    cout<<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;    if (t1<=t2) cout<<"t1≤t2"<<endl;    cout<<endl;    t3=t1+t2;    cout<<"t1+t2: ";    t3.display();    t4=t1-t2;    cout<<"t1-t2: ";    t4.display();    cout<<"输入要t2增加的秒数:"<<endl;    cin>>s1;    t5=t2+s1;    cout<<"t2增加"<<s1<<"秒: ";    t5.display();    cout<<"输入要t1减少的秒数:"<<endl;    cin>>s2;    t6=t2-s2;    cout<<"t1减少"<<s2<<"秒: ";    t6.display();}


 

成果展示:

心得体会:

哎,低级错误不断啊!

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