NthDayOfWeek 计算并返回指定日期是该月第几周
Unit: DateUtils
function NthDayOfWeek(const AValue: TDateTime): Word;
Example:
Uses SysUtils,DateUtils;
Begin Write('Today is the ',NthDayOfWeek(Today),'-th '); Writeln(formatdateTime('dddd',Today),' of the month.'); End.
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