头文件
#include<iostream>using namespace std;class Date
{
public:int GetMonthDay(int year, int month){static int MonthDay[13] = { 0,31,28,31,30,31,30,31,31,30,31,30,31 };if (month == 2 && ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0))){return 29;}return MonthDay[month];}//全缺省的构造函数Date(int year = 1, int month = 1, int day = 1);//拷贝构造函数Date(const Date& d);//赋值运算符重载Date& operator=(const Date& d);//日期+=天数Date& operator+=(int day);//日期+天数Date operator+(int day);//日期-=天数Date& operator-=(int day);//日期-天数Date operator-(int day);//前置++Date& operator++();//后置++Date operator++(int);//前置--Date& operator--();//后置--Date operator--(int);// >运算符重载bool operator>(const Date& d);// ==运算符重载bool operator==(const Date& d);// >=运算符重载bool operator>=(const Date& d);// <运算符重载bool operator<(const Date& d);// <=运算符重载bool operator <= (const Date& d);// !=运算符重载bool operator != (const Date& d);// 日期-日期 返回天数int operator-(const Date& d);//打印void Print();//析构函数~Date();
private:int _year;int _month;int _day;
};
源文件
#include"Date.h"//全缺省的构造函数
Date::Date(int year, int month, int day)
{_year = year;_month = month;_day = day;
}
//拷贝构造函数
Date::Date(const Date& d)
{_day = d._day;_month = d._month;_year = d._year;
}
//赋值运算符重载
Date& Date::operator=(const Date& d)
{if (this != &d){_year = d._year;_month = d._month;_day = d._day;}return *this;
}
//日期+=天数
Date& Date::operator+=(int day)
{_day += day;while (_day > GetMonthDay(_year, _month)){_day -= GetMonthDay(_year, _month);_month++;if (_month == 13){_year++;_month = 1;}}return *this;
}
//日期+天数
Date Date::operator+(int day)
{Date tmp = *this;tmp += day;return tmp;
}
//日期-=天数
Date& Date::operator-=(int day)
{_day -= day;while (_day <= 0){_month--;if (_month == 0){_year--;_month = 12;}_day += GetMonthDay(_year, _month);}return *this;
}
//日期-天数
Date Date::operator-(int day)
{Date tmp = *this;tmp -= day;return tmp;
}
//前置++
Date& Date::operator++()
{*this += 1;return *this;
}
//后置++
Date Date::operator++(int)
{Date tmp = *this;++(*this);return tmp;
}
//前置--
Date& Date::operator--()
{*this -= 1;return *this;
}
//后置--
Date Date::operator--(int)
{Date tmp = *this;--(*this);return tmp;
}
// >运算符重载
bool Date::operator>(const Date& d)
{if (_year > d._year){return true;}else if (_year == d._year && _month > d._month){return true;}else if (_year == d._year && _month == d._month && _day > d._day){return true;}else{return false;}
}
// ==运算符重载
bool Date::operator==(const Date& d)
{return _year == d._year&& _month == d._month&& _day == d._day;
}
// >=运算符重载
bool Date::operator>=(const Date& d)
{return *this == d || *this > d;
}
// <运算符重载
bool Date::operator<(const Date& d)
{return !(*this >= d);
}
// <=运算符重载
bool Date::operator <= (const Date& d)
{return !(*this > d);
}
// !=运算符重载
bool Date::operator != (const Date& d)
{return !(*this == d);
}
// 日期-日期 返回天数
int Date::operator-(const Date& d)
{int count = 0;Date max = *this;Date min = d;if (max < min){max = d;min = *this;}while (max != min){min++;count++;}if (*this < d){count = -count;}return count;
}
void Date::Print()
{cout << _year << "年" << _month << "月" << _day << "日" << endl;
}
Date::~Date()
{;
}
