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Delphi source code for Math >> Calculate the age of a person

Category: Math
Title: Calculate the age of a person
Date added: 15.03.2006
Hits: 20666

function CalculateAge(Birthday, CurrentDate: TDate): Integer;
  Month, Day, Year, CurrentYear, CurrentMonth, CurrentDay: Word;
  DecodeDate(Birthday, Year, Month, Day);
  DecodeDate(CurrentDate, CurrentYear, CurrentMonth, CurrentDay);
  if (Year = CurrentYear) and (Month = CurrentMonth) and (Day = CurrentDay) then
    Result := 0;
    Result := CurrentYear - Year;
    if (Month > CurrentMonth) then
      if Month = CurrentMonth then
        if (Day > CurrentDay) then

procedure TForm1.Button1Click(Sender: TObject);
  Label1.Caption := Format('Your age is %d', [CalculateAge(StrToDate('01.03.1953'), Date)]);

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