Category: Math
Title: Convert a Binary Number into a Decimal Number
Date added: 15.03.2006
Hits: 3560


function BinToInt(Value: string): Integer;
var
  i, iValueSize: Integer;
begin
  Result := 0;
  iValueSize := Length(Value);
  for i := iValueSize downto 1 do
    if Value[i] = '1' then Result := Result + (1 shl (iValueSize - i));
end;


function IntToBin1(Value: Longint; Digits: Integer): string;
var
  i: Integer;
begin
  Result := '';
  for i := Digits downto 0 do
    if Value and (1 shl i) <> 0 then
      Result := Result + '1'
  else
    Result := Result + '0';
end;


function IntToBin2(d: Longint): string;
var
  x, p: Integer;
  bin: string;
begin
  bin := '';
  for x := 1 to 8 * SizeOf(d) do
  begin
    if Odd(d) then bin := '1' + bin
    else
      bin := '0' + bin;
    d := d shr 1;
  end;
  Delete(bin, 1, 8 * ((Pos('1', bin) - 1) div 8));
  Result := bin;
end;

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