[Overview][Constants][Procedures and functions][Index] |
Check whether a given year/month/week/day of the week combination is a valid day
Source position: dateutil.inc line 103
function IsValidDateMonthWeek( |
const AYear: Word; |
const AMonth: Word; |
const AWeekOfMonth: Word; |
const ADayOfWeek: Word |
):Boolean; |
AYear |
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Year |
AMonth |
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Month of the year |
AWeekOfMonth |
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Week of the month. |
ADayOfWeek |
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Day in the week. |
True if the given combination is a valid date, False otherwise.
IsValidDateMonthWeek returns True if AYear, AMonthAWeekOfMonth and ADayOfWeek form a valid date indication, or False otherwise.
AYear must be in the range 1..9999 to be valid.
The AWeekOfMonth,ADayOfWeek values are checked to see whether the combination falls within the valid range of weeks for the AYear,AMonth combination.
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Check whether a set of values is a valid date indication. |
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Check whether a set of values is a valid time indication. |
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Check whether a set of values is a valid date and time indication. |
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Check whether a given year/day of year combination is a valid date. |
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Check whether a given year/week/day of the week combination is a valid day. |
Program Example11; { This program demonstrates the IsValidDateMonthWeek function } Uses SysUtils,DateUtils; Var Y,W,D : Word; B : Boolean; Begin For Y:=2000 to 2004 do begin B:=True; For W:=4 to 6 do For D:=1 to 7 do If B then begin B:=IsValidDateMonthWeek(Y,12,W,D); If Not B then if (D=1) then Writeln('December ',Y,' has exactly ',W,' weeks.') else Writeln('December ',Y,' has ',W,' weeks and ',D-1,' days.'); end; end; End.