Zeller公式示例

Zeller公式用于计算给定日期是星期几。

 1 //根据日期计算星期几

 2

 3  int SDGSELFLocalTime::CalWhatDay(ST_LOCALDATE& l_stDate)

 4 {

 5  int year = l_stDate.m_nYear;

 6  int month = l_stDate.m_nMonth;

 7  int day = l_stDate.m_nDay;

 8  if (month < 3)

 9  {

10   year -= 1;

11   month += 12;

12  }

13  int c = int(year / 100) , y = year - 100 * c;

14  int w = int(c / 4) - 2*c +y +int(y/4) +(26 * (month + 1)/10) + day - 1;

15  w = (w % 7 + 7) % 7;

16  return w;

17 }