日期類的完善

函式的宣告

包括日期加、日期減、大於、大於等於、小於、小於等於、判斷等於、不等於、以及前置++、--，後置++、--

#include using namespace std;

typedef unsigned int uint;
class date
date operator +(const uint delay) const;
date operator -(const uint delay) const;
bool operator >(const date & d) const;
bool operator 
bool operator <=(const date & d) const;
bool operator >=(const date & d) const;
bool operator ==(const date & d) const;
bool operator !=(const date & d) const;
date operator ++();
date operator ++(int);
date operator --();
date operator --(int);
friend ostream &operator << (ostream & os, date & d);
//void showdate();
};

#include "date.h"

static uint getmonthday(int y,uint m)
if (m == 4 || m == 6 || m == 9 || m == 11)
if (m == 2)
else }
date date:: operator +(uint delay) const
tmp = getmonthday(res.m_year, res.m_month);
} res.m_day += delay;
if (res.m_day > tmp)
res.m_day -= tmp;
} return res;
} date date:: operator -(uint delay) const
else
res.m_month--;
tmp = getmonthday(res.m_year, res.m_month);
while (delay >= tmp)
tmp = getmonthday(res.m_year, res.m_month);
} int tmpday = res.m_day;
tmpday = res.m_day - delay;
if (tmpday <= 0)
else
}res.m_day = tmpday;
return res;
}ostream &operator << (ostream & os, date & d) //輸出流
bool date ::operator 
else if (m_year == d.m_year && m_month < d.m_month)
else if (m_year == d.m_year && m_month == d.m_month && m_day < d.m_day)
return false;
}bool date ::operator <=(const date & d) const
bool date ::operator >(const date & d) const
else if (m_year == d.m_year && m_month > d.m_month)
else if (m_year == d.m_year && m_month == d.m_month && m_day > d.m_day)
return false;
}bool date ::operator >=(const date & d) const
bool date ::operator ==(const date & d) const
return false; }
bool date ::operator !=(const date & d) const
date date:: operator ++()
} return *this;
}date date:: operator ++(int)
} return tmp;
}date date::operator --()
m_day = getmonthday(m_year, m_month);
} return *this;
}date date::operator --(int)
m_day = getmonthday(m_year, m_month);
} return tmp;
}

int main()

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