代码实现

#define _CRT_SECURE_NO_WARNINGS 1
#include <iostream>
using namespace std;
class Date {
public:// 获取某年某月的天数int GetMonthDay(int year, int month){static int monteDays[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 monteDays[month];/*if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12){return 31;}else if (month == 2){if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0)){return 29;}else{return 28;}}else{return 30;}*/}// 全缺省的构造函数Date(int year = 1900, int month = 1, int day = 1){_year = year;_month = month;_day = day;}// 拷贝构造函数// d2(d1)Date(const Date& d){this->_year = d._year;this->_month = d._month;this->_day = d._day;}// 赋值运算符重载//d2 = d3 -> d2.operator=(&d2, d3)Date& operator=(const Date& d){if (this != &d){this->_year = d._year;this->_month = d._month;this->_day = d._day;}return *this;}// 析构函数~Date(){;}// 日期+=天数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 operator+(int day){/*Date tmp(*this);tmp._day += day;while (tmp._day > GetMonthDay(tmp._year, tmp._month)){tmp._day -= GetMonthDay(tmp._year, tmp._month);++tmp._month;if (tmp._month == 13){++tmp._year;tmp._month = 1;}}return tmp;*/Date tmp(*this);tmp += day;return tmp;}// 日期-=天数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 operator-(int day){//Date tmp = *this;Date tmp(*this);tmp -= day;return tmp;}// 前置++Date& operator++(){*this += 1;return *this;}// 后置++Date operator++(int){Date tmp = *this;*this += 1;return tmp;}// 后置--Date operator--(int){Date tmp = *this;*this -= 1;return tmp;}// 前置--Date& operator--(){*this -= 1;return *this;}// >运算符重载bool operator>(const Date& d){if (this->_year > d._year){return true;}else if (this->_year == d._year){if (this->_month > d._month){return true;}else if (this->_month == d._month){if (this->_day > d._day){return true;}}}return false;}// ==运算符重载bool operator==(const Date& d){return _year==d._year&& _month==d._month&& _day==d._day;}// >=运算符重载bool operator >= (const Date& d){return (*this > d)||(*this==d);/*if (this->_year > d._year){return true;}else if (this->_year == d._year){if (this->_month > d._month){return true;}else if (this->_month == d._month){if (this->_day >= d._day){return true;}}}return false;*/}// <运算符重载bool operator < (const Date& d){return !(*this >= d);/*if (this->_year < d._year){return true;}else if (this->_year == d._year){if (this->_month < d._month){return true;}else if (this->_month == d._month){if (this->_day < d._day){return true;}}}return false;*/}// <=运算符重载bool operator <= (const Date& d){return !(*this > d);/*if (this->_year < d._year){return true;}else if (this->_year == d._year){if (this->_month < d._month){return true;}else if (this->_month == d._month){if (this->_day <= d._day){return true;}}}return false;*/}// !=运算符重载bool operator != (const Date& d){return !(*this == d);/*if (this->_year == d._year){if (this->_month == d._month){if (this->_day == d._day){return true;}}}*/return false;}// 日期-日期 返回天数int operator-(const Date& d){int flag = 1;Date max = *this;Date min = d;if (*this < d){int flag = -1;max = d;min = *this;}int n = 0;while (min != max){++min;++n;}return n * flag;}
private:int _year;int _month;int _day;
};
int main()
{Date d1;//1900/1/1Date d2(d1);Date d3(2024,1,28);//2024/1/28d2.operator=(d3);//d2=d3Date d4(2000,1,1);Date d5(2000,1,1);cout << d1.operator<(d3) << endl;cout << d3.operator<(d1) << endl;cout << d2.operator==(d3) << endl;cout << d1.operator==(d3) << endl;cout << d1.operator>(d2) << endl;cout << d2.operator>(d1) << endl;cout << d1.GetMonthDay(2000, 1) << endl;cout << d4.operator>=(d5) << endl;cout << d4.operator>(d5) << endl;cout << d4.operator<=(d5) << endl;cout << d4.operator<(d5) << endl;cout << d4.operator!=(d5) << endl;cout << d4.operator!=(d3) << endl;Date d6(2020, 1, 1);d6.operator+=(20);Date d7 = d6.operator+(30);Date d8(2024, 1, 30);d8.operator-=(30);Date d9 = d8.operator-(30);Date d10(2000, 1, 30);//Date D1 = d10.operator++(0);//d10++//Date D2 = d10.operator--(0);//d10--;//Date D3 = d10.operator++();//++d10;//Date D4 = d10.operator--();//--d10;d10++;d10--;++d10;--d10;Date d11(2024, 1, 30);Date d12(2024, 8, 1);cout << d12 - d11 << endl;cout << d11 - d12 << endl;return 0;
}

测试截图