2015年大一下第6周项目2

项目2"/>

2015年大一下第6周项目2

/*
*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25日
*版本号:v1.0
*
*问题描述:实现Time类中的运算符重载。
*输入描述:无。
*输出描述:Time类之间的比较，时间的增加与减少。
*/
#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19:41:15CTime 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
};
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;
}
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;//在测试下面的代码时，请采用单步执行的方法跟踪t=t1+t2;t.display();t=t1-t2;t.display();t=t1+2000;t.display();t=t1-5000;t.display();t1+=t2;t1.display();t1-=t2;t1.display();t1+=2000;t1.display();t1-=5000;t1.display();return 0;
}

运行结果：