九周 项目2

/*
*程序的版权和版本号声明部分：
*Copyright(c)2014。烟台大学计算机学院学生
*All rights reserved.
*文件名:
*作者：赵加响
*完毕日期：2014  年 4月22 日
*版本号号：v1.0
*对任务及求解方法的描写叙述部分：
*输入描写叙述：无
*问题描写叙述：
*程序输出：
*问题分析：
*算法设计：
*/
#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();
    //二目的比較运算符重载
    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);//对比+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
	friend ostream&operator<<(ostream&,CTime&);
};
//以下实现全部的运算符重载代码。

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;
}
ostream&operator<<(ostream&output,CTime&t)
{
    output<<t.hour<<":"<<t.minute<<":"<<t.second<<endl;
    return output;
}
CTime CTime::operator++(int)
{
    CTime t=*this;
    second++;
    if(second>59)
    {
        second-=60;
        minute++;
    }
    if(minute>59)
    {
        minute-=60;
        hour++;
    }
    if(hour>=24)
    {
        hour-=24;
    }
    return t;
}
CTime CTime::operator++()
{
    ++second;
    if(second>59)
    {
        second-=60;
        minute++;
    }
    if(minute>59)
    {
        minute-=60;
        hour++;
    }
    if(hour>=24)
    {
        hour-=24;
    }
    return *this;
}
CTime CTime::operator--(int)
{
    CTime t=*this;
    second--;
    if(second<0)
    {
        second+=60;
        minute--;
    }
    if(minute<0)
    {
        minute+=60;
        hour--;
    }
    if(hour<0)
    {
        hour+=24;
    }
    return t;
}
CTime CTime::operator--()
{
    CTime t=*this;
    --second;
    if(second<0)
    {
        second+=60;
        minute--;
    }
    if(minute<0)
    {
        minute+=60;
        hour--;
    }
    if(hour<0)
    {
        hour+=24;
    }
    return *this;
}
bool CTime::operator > (CTime &t)
{
    if(hour>t.hour)
        return true;
        else
            return false;
    if(hour==t.hour&&minute>t.minute)
        return true;
        else
            return false;
    if(hour==t.hour&&minute==t.minute&&second>t.second)
        return true;
        else
            return false;
}
bool CTime::operator < (CTime &t)
{
    if(hour<t.hour)
        return true;
        else
            return false;
    if(hour==t.hour&&minute<t.minute)
        return true;
        else
            return false;
    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;
}
bool CTime::operator <= (CTime &t)
{
    if(*this>t)return false;
    return true;
}
bool CTime::operator == (CTime &t)
{
    if(*this>t||*this<t)return false;
    return true;
}
bool CTime::operator != (CTime &t)
{
    if(*this==t)return false;
    return true;
}
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>24)
    {
        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;
    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 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 &c)
{
    *this=*this+c;
    return *this;
}
CTime CTime::operator+=(int s)
{
    *this=*this+s;
    return *this;
}
CTime CTime::operator-=(CTime &c)
{
    *this=*this-c;
    return *this;
}
CTime CTime::operator-=(int s)
{
    *this=*this-s;
    return *this;
}
//自行编制用于測试的main()函数。有些结果不必依赖display()函数，提倡用单步运行查看结果
int main()
{
    CTime t1(8,8,8),t2,t3,t4,t5,t6,t7,t8;
    int a,b,c,s1,s2;
    char m1,m2;
    cout<<"t1:";
    cout<<t1<<endl;
    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<<"输入时间不正确！又一次输入："<<endl;
    else if(m1!=':'||m2!=':')
    cout<<"时间格式不正确！
又一次输入："<<endl;
    else
    break;
    }
    t2.setTime(a,b,c);
    cout<<"t2: ";
    cout<<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;  //“≠”是怎么打出来的？？
    if (t1>=t2) cout<<"t1≥t2"<<endl;
    if (t1<=t2) cout<<"t1≤t2"<<endl;
    cout<<endl;
    t3=t1+t2;
    cout<<"t1+t2: ";
    cout<<t3<<endl;
    t4=t1-t2;
    cout<<"t1-t2: ";
    cout<<t4<<endl;
    cout<<"输入要t2添加的秒数："<<endl;
    cin>>s1;
    t5=t2+s1;
    cout<<"t2添加"<<s1<<"秒: ";
    cout<<t5<<endl;
    cout<<"输入要t1降低的秒数："<<endl;
    cin>>s2;
    t6=t2-s2;
    cout<<"t1降低"<<s2<<"秒: ";
    cout<<t6<<endl;
    cout<<"t1自增一秒后的结果：";
    t7=++t1;
    cout<<t7<<endl;
    cout<<"t2自减一秒后的结果：";
    t8=--t2;
    cout<<t8<<endl;
}

感悟：输入还没有弄懂，老是出错，就没有再写。一定要掌握它。