日期类

来源：互联网发布：苹果mac双系统切换编辑：程序博客网时间：2024/06/06 20:29
#include<iostream>using namespace std;class Date{public:    Date(int year=1970,int month=1,int day=1)//构造函数        :_year(year)        , _month(month)        , _day(day)    {        if (!Check_Date())        {            cout << "非法日期！" << endl;            exit(0);        }    }    Date(const Date&d);//拷贝构造函数    Date& operator=(const Date& d);//赋值运算符重载    friend ostream& operator<<(ostream& _cout,Date& d);//输出流重载    Date operator-(int days);//减去一个时间    Date operator+(int days);//加上一个时间    int operator-(const Date& d);//日期之间相差多少天    //Date& operator++();//前置加加    //Date operator++(int);//后置加加    //Date& operator--();    //Date operator--(int);    bool operator>(const Date& d);    bool operator<(const Date& d);    bool operator==(const Date& d);    bool operator!=(const Date& d);    void Display();//显示日期    int Month_day(int year,int month);//查看当前月有多少天    bool Check_Date();//检查日期是否为合格日期    bool  IsLeap()    {        if (((_year % 4 == 0) && (_year % 100 != 0)) || (_year % 400) == 0)            return true;        else            return false;    }private:    int _year;    int _month;    int _day;};int Date::Month_day(int year,int month){    int DayOfMonth[13] = { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };    if (((_year % 4 == 0) && (_year % 100 != 0)) || (_year % 400) == 0)    {        if (month == 2)            return DayOfMonth[month] + 1;        else            return DayOfMonth[month];    }        else            return DayOfMonth[month];}Date::Date(const Date&d){    _year = d._year;    _month = d._month;    _day = d._day;}Date& Date::operator=(const Date& d){    if (this != &d)    {        _year = d._year;        _month = d._month;        _day = d._day;    }    return *this;}ostream& operator<<(ostream& _cout, Date& d){    _cout << d._year << "年" << d._month << "月" << d._day << "日";    return _cout;}Date Date::operator-(int days){    Date temp(*this);    if (days>0)    {        temp._day = temp._day - days;        while (temp._day<=0)        {            if (temp._month == 1)            {                temp._month = 12;                temp._year -= 1;            }            else                temp._month -= 1;            temp._day =temp._day+ Month_day(temp._year, temp._month);        }    }    else if (days<0)    {        return (*this) +(-days);    }    return temp;}int Date::operator-(const Date& d){    int count = 0;    Date FutureDate;    Date PastDate;    if (*this > d)    {        FutureDate=*this;        PastDate=d;    }    else    {        FutureDate = d;        PastDate =*this;    }    while (FutureDate != PastDate)    {        PastDate = PastDate+1;        count++;    }    return count;}bool Date::operator>(const Date&d){    if ((_year <= d._year) && (_month <= d._month) && (_day <= d._day))        return false;    else    {        if ((_year == d._year) && (_month == d._month) && (_day == d._day))            return false;            return true;    }}bool Date::operator<(const Date&d){    if ((_year >= d._year) && (_month >= d._month) && (_day >= d._day))        return false;    else    {        if ((_year == d._year) && (_month == d._month) && (_day == d._day))            return false;        return true;    }}bool Date::operator==(const Date& d){    if ((_year == d._year) && (_month == d._month) && (_day == d._day))        return true;    else        return false;}bool Date::operator!=(const Date& d){    if ((_year == d._year) && (_month == d._month) && (_day == d._day))        return false;    else        return true;}Date Date::operator+(int days){    Date temp(*this);    if (days < 0)    {        return *this - (-days);    }    else if (days>=0)    {        temp._day = temp._day + days;        while (temp._day>Month_day(temp._year, temp._month))        {            temp._day = temp._day - Month_day(temp._year, temp._month);            if (temp._month == 12)            {                temp._month = 1;                temp._year += 1;            }            else                temp._month += 1;        }    }    return temp;}bool Date::Check_Date(){    if (_year > 0)    {        if (_month > 0 && _month <= 12)        {            if (_day > 0 && (_day <= Month_day(_year,_month)))                return true;        }    }    return false;}void Date::Display(){    cout << _year << "年" << _month << "月" << _day << "日" << endl;}int main(){    Date d1(2017, 4, 26);    Date d2;    Date d3(2016,4,26);    //Date d2(1000, 2, 11);    //int ret = d1.Month_day();    //cout << ret<<endl;     d2 = d1;    /*d1.Display();    d2.Display();    d3.Display();*/    /*cout << d1<<endl;    d3 = d1 + 999;    cout << d3 << endl;*/     int count = d3 - d1;     cout << count;    return 0;}
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