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如下所示：
#include<iostream>
using namespace std;
class Date
{
public:
Date(int year = 1900, int month = 1, int day = 1) //构造
:_year(year)
, _month(month)
, _day(day)
{
if (!isInvalidDate(_year, _month, _day))
{
_year = 1900;
_month = 1;
_day = 1;
}
}
Date operator+(int count)
{
Date tmp(*this);
tmp._day += count;
ToCorrect(tmp);
return tmp;
}
Date operator-(int count)
{
Date tmp(*this);
tmp._day -= count;
ToCorrect(tmp);
return tmp;
}
Date& operator++() //前置++
{
(*this)++;
return *this;
}
Date operator++(int) //后置++
{
Date tmp(*this);
(*this)+=1;
return tmp;
}
Date& operator--()
{
(*this)--;
return *this;
}
Date operator--(int)
{
Date tmp(*this);
(*this)--;
return tmp;
}
int operator-(const Date &d)
{
int flag = 1;
Date max = *this;
Date min = d;
if (*this<d)
{
max = d;
min = *this;
flag = -1;
}
int count=0;
while (min != max)
{
++min;
count++;
}
return count*flag;
}
Date& operator+=(int day)
{
*this = *this + day;
return *this;
}
bool operator!=(const Date &d)
{
return !(*this == d);
}
bool operator<(const Date &d)
{
return !((*this>d)||(*this==d));
}
bool operator>=(const Date &d)
{
return !(*this<d);
}
bool operator>(const Date &d)
{
return (_year > d._year
|| (_year == d._year && _month > d._month)
|| (_year == d._year && _month == d._month && _day > d._day));
}
bool operator==(const Date &d)
{
return ((_year == d._year) && (_month == d._month) && (_day == d._day));
}
public:
bool IsLeapYear(int year)
{
if(year % 400 || (year % 4 && year % 100))
return true;
return false;
}
int YearsOfMonth(int year, int month)
{
int day;
int days[13] = { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
day = days[month];
if (month == 2)
day += IsLeapYear(year);
return day;
}
Date ToCorrect(Date &d)
{
if (d._day>YearsOfMonth(d._year, d._month))
{
while (d._day > YearsOfMonth(d._year, d._month))
{
d._day -= YearsOfMonth(d._year,d._month);
if (d._month == 12)
{
d._year++;
d._month = 1;
}
else
{
++d._month;
}
}
}
else
{
while (d._day <= 0)
{
if (d._month == 1)
{
d._year--;
d._month = 12;
}
else
{
--d._month;
}
d._day += YearsOfMonth(d._year, d._month);
}
}
return d;
}
bool isInvalidDate(int year, int month, int day)
{
if ((year < 1) || (month<0 || month>12) || (day<0 || day>YearsOfMonth(year,month)))
return false;
return true;
}
void Display()
{
cout << _year << "-" << _month << "-" << _day << endl;
}
friend istream& operator>>(istream& is, Date &d);
friend ostream& operator<<(ostream& os, const Date &d);
private:
int _year;
int _month;
int _day;
};
istream& operator>>(istream& is, Date& d)
{
cout << "请输入一个日期" << endl;
is >> d._year >> d._month >> d._day;
return is;
}
ostream& operator<<(ostream& os, const Date &d)
{
cout << d._year << "-" <<d. _month << "-" << d._day << endl;
return os;
}
int main()
{
/*Date d1(2016,8,18);
//d1.Display();
//d1 = d1++;
cout << d1 << endl;*/
//Date d1(2015, 12, 3);
//(d1++).Display(); //d1.operator++(&d1, 0);
//(++d1).Display(); //d1.operator++(&d1);
Date d1(2015, 12, 3);
Date d2(2015, 11, 1);
cout << (d1 - d2) << endl;
//Date d1(2015, 12, 3);
//Date ret = d1 + 40; //operator+
//ret.Display();
/*Date d1(2015, 12, 3);
Date ret = d1 + 40;
d1 = ret;
ret = d1 - 40;
ret.Display();*/
/*Date ret;
Date d2(2015, 1, 1);
ret = d2 - 1;
ret.Display();*/
return 0;
}
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以上这篇C++实现日期类(Date类)的方法就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。
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