c 将年月日转化为星期

/*得到年月日转化为星期几*/
LOCAL ulong_t DateWeekGet(ulong_t year,ulong_t month,ulong_t day)
{
    ulong_t c = ;
    ulong_t s = ;
    ulong_t w = ;
    ulong_t week_day = ;
    if (month==) c=day;
    else if (month==) c=+day;
    else if (month==) c=++day;
    else if (month==) c=+++day;
    else if (month==) c=++++day;
    else if (month==) c=+++++day;
    else if (month==) c=++++++day;
    else if (month==) c=+++++++day;
    else if (month==) c=++++++++day;
    else if (month==) c=+++++++++day;
    else if (month==) c=++++++++++day;
    else if (month==) c=+++++++++++day;
    if (month>)
    {
      if (year%==)
      {
          if (year%==)
              c=c+;
      }
      else if (year%==)
          c=c+;
    }
    s=(year-)*+(year-)/-(year-)/+(year-)/+c;
    w=s%;
    if(w == )
    {
        week_day = ;
    }
    else
    {
        week_day = w;
    }
    return week_day;
}

    static char *monthNames[] =
    {
        "???",
        "Jan",
        "Feb",
        "Mar",
        "Apr",
        "May",
        "Jun",
        "Jul",
        "Aug",
        "Sep",
        "Oct",
        "Nov",
        "Dec"
    };

    static char *weekNames[] =
    {
        "???",
        "Mon",
        "Tue",
        "Wed",
        "Thu",
        "Fri",
        "Sat",
        "Sun"
    };