2015年大一下第7周项目2

项目2"/>

2015年大一下第7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19:41:15CTime 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//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;
}

运行结果：