项目2"/>
项目2
/*
* Copyright (c) 2011, 烟台大学计算机学院
* All rights reserved.
* 作 者:王静
* 完成日期:2013 年 4 月 24 日
* 版 本 号:v1.0
* 输入描述:
* 问题描述:
* 程序输出:
* 问题分析:
* 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
int hour;int minute;int second;
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;
}
//比较运算符(二目)的重载
bool CTime::operator > (CTime &t)
{if(hour>t.hour){return true;}else{if(hour==t.hour&&minute>t.minute){return true;}else{if(minute==t.minute&&second>t.second){return true;}else{return false;}}}
}
bool CTime::operator < (CTime &t)
{if(hour<t.hour){return true;}else{if(hour==t.hour&&minute<t.minute){return true;}else{if(minute==t.minute&&second<t.second){return true;}else{return false;}}}
}
bool CTime::operator >= (CTime &t)
{if(hour>=t.hour){if(hour==t.hour&&minute>=t.minute){if(minute==t.minute&&second>=t.second){return true;}else{return false;}}else{return false;}}else{return false;}
}
bool CTime::operator <= (CTime &t)
{if(hour<=t.hour){if(hour==t.hour&&minute<=t.minute){if(minute==t.minute&&second<=t.second){return true;}else{return false;}}else{return false;}}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;}
}
//二目运算符的重载
CTime 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:41:15
{CTime t;t.hour=hour+c.hour;t.minute=minute+c.minute;t.second=second+c.second;if(t.second>60){second=t.second%60;t.minute=t.minute+t.second/60;if(t.minute>60){minute=t.minute%60;t.hour=t.hour+t.minute/60;if(t.hour>24){t.hour=t.hour/24;}t.minute=minute;}t.second=second;}return t;
}
CTime CTime::operator-(CTime &c)//对照+理解
{CTime t;t.hour=hour-c.hour;t.minute=minute-c.minute;t.second=second-c.second;int i=0,j=0;if(t.second<0||t.minute<0||t.hour<0){for(;t.second<0;i++){t.second+=60;}t.minute-=i;for(;t.minute<0;j++){t.minute+=60;}t.hour-=j;for(;t.hour<0;){t.hour+=24;}}return t;
}
CTime CTime::operator+(int s)//返回s秒后的时间
{CTime t;t.second=s+second;t.minute=minute;t.hour=hour;if(t.second>60){second=t.second%60;t.minute=minute+t.second/60;t.second=second;if(t.minute>60){minute=t.minute%60;t.hour=hour+t.minute/60;t.minute=minute;if(t.hour>24){t.hour=t.hour%24;}}}return t;
}
CTime CTime::operator-(int s)//返回s秒前的时间
{CTime t;int i=0,j=0;t.second=second-s;t.minute=minute;t.hour=hour;if(t.second<0){for(;t.second<0;i++){t.second+=60;}t.minute-=i;for(;t.minute<0;j++){t.minute+=60;}t.hour-=j;for(;t.hour<0;){t.hour+=24;}}return t;
}
//一目运算符的重载
CTime CTime::operator++(int)//后置++,下一秒
{ CTime t=*this; *this=*this+1; return t;
}
CTime CTime::operator++()//前置++,下一秒
{ *this=*this+1; return *this;
}
CTime CTime::operator--(int)//后置--,前一秒
{ CTime t=*this; *this=*this-1; return t;
}
CTime CTime::operator--()//前置--,前一秒
{ *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)//返回s秒后的时间
{ *this=*this+s; return *this;
}
CTime CTime::operator-=(int s)//返回s秒前的时间
{ *this=*this-s; return *this;
}
int main()
{CTime t1(8,20,25),t2(11,20,50),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t=t1+t2;t.display();t=t1-t2;t=t1+300;t.display();t=t1-300;t.display();t=t1++; t.display();t=++t1; t.display();t1--; t1.display();--t1; t1.display();t1+=t2;t1.display();t1-=t2; t1.display();t1+=300; t1.display();t1-=300; t.display();return 0;
}
运行结果:
(贴图)
心得体会:
更多推荐
项目2
发布评论