標題 : 無限進制轉換
說明 : 使用於數學領域進制之間相互轉換
設計 :Zswang
日期 :2002-01-24
//*)
///////Begin Source
const
cScaleChar = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ';
function IntPower(Base, Exponent: Integer): Integer; { 返回 Base 的 Exponent 次方 }
var
I: Integer;
begin
Result := 1;
for I := 1 to Exponent do
Result := Result * Base;
end; { IntPower }
function IntToDigit(mNumber: Integer; mScale: Byte;
mLength: Integer = 0): string;
{ 返回整數的進制表示 ;mScale 指定多少進制 ;mLength 指定長度 ,長度不足時向前補 0 }
var
I, J: Integer;
begin
Result := '';
I := mNumber;
while (I >= mScale) and (mScale > 1) do begin
J := I mod mScale;
I := I div mScale;
Result := cScaleChar[J + 1] + Result;
end;
Result := cScaleChar[I + 1] + Result;
for I := 1 to mLength - Length(Result) do Result := '0' + Result;
end; { IntToDigit }
function DigitToInt(mDigit: string; mScale: Byte): Integer;
{ 返回進制表示轉換成整數 ;mScale 指定多少進制 }
var
I: Byte;
L: Integer;
begin
Result := 0;
mDigit := UpperCase(mDigit);
L := Length(mDigit);
for I := 1 to L do
Result := Result + (Pos(mDigit[L - I + 1], cScaleChar) - 1) *
IntPower(mScale, I - 1);
end; { DigitToInt }
///////End Source
///////Begin Demo
procedure TForm1.Button1Click(Sender: TObject);
begin
Edit1.Text := IntToDigit(StrToIntDef(Edit2.Text, 0), 16);
end;
procedure TForm1.Button2Click(Sender: TObject);
begin
Edit2.Text := IntToStr(DigitToInt(Edit1.Text, 16));
end;
///////End Demo