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For example,
1101 is a 1*10^0+0*10^1+1*10^2+1*10^3
So, inplementation of this algorithm is so:
function Pow(i, k: Integer): Integer;
var
j, Count: Integer;
begin
if k>0 then j:=2
else j:=1;
for Count:=1 to k-1 do
j:=j*2;
Result:=j;
end;
function BinToDec(Str: string): Integer;
var
Len, Res, i: Integer;
Error: Boolean;
begin
Error:=False;
Len:=Length(Str);
Res:=0;
for i:=1 to Len do
if (Str[i]='0')or(Str[i]='1') then
Res:=Res+Pow(2, Len-i)*StrToInt(Str[i])
else
begin
MessageDlg('It is not a binary number', mtInformation, [mbOK], 0);
Error:=True;
Break;
end;
if Error=True then Result:=0
else Result:=Res;
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
if Edit1.Text<>'' then
Label2.Caption:=IntToStr(BinToDec(Edit1.Text));
end;
- Related topics
-
Convert decimals to binary
Convert decimals to hexadecimals
Convert hexadecimals to decimals
- For more
-
Delphi Help
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