is istv legal

Code:#include Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced. HDU 3342 Legal or not (to determine whether the graph is topological and orderly for a given graph)

/***************** Determine whether pop is a legal sequence of the SRC stack ************ * ***************/bool ispopseq (string SRC, string pop) {stack

Isvaliddatetime, Isvaliddate, Isvalidtime, Isvaliddateday ... Determine whether time is legal DateUtils.IsValidDateTime DateUtils.IsValidDate DateUtils.IsValidTime DateUtils.IsValidDateDay DateUtils.IsValidDateWeek DateUtils.IsValidDateMonthWeek //可用下面几个过程抛出异常: DateUtils.InvalidDateDayError DateUtils.InvalidDateMonthWeekError DateUtils.InvalidDateTimeError DateUtils.InvalidDateWeekError DateUtils.InvalidD

How to use JavaScript to determine whether the date of entry is legal function Isvalidyear (psyear){var syear = new String (psyear); if (psyear==null){return false;} if (isNaN (psyear) ==true){return false;} if (Syear = ""){return true;} if (Syear.match (/[^0-9]/g)!=null){return false;} var nyear = parseint (Syear, 10); if ((Nyear {return false;} return true;} function Isvalidmonth (psmonth){var smonth = ne