delphi 分享三个随机字符串

uses math;

function GenID:String;
var
b, x: byte;
begin
  Result := '{';
  Randomize;
  for b:=  to  do
  begin
    if Random() >  then Result := Result + chr(RandomRange(,))
    else Result := Result + chr(RandomRange(,));
  end;
  Result := Result + '-';
  for x:=  to  do
  begin
    for b:=  to  do
    begin
      if Random() <  then Result := Result + chr(RandomRange(,))
      else Result := Result + chr(RandomRange(,));
    end;
    Result := Result + '-';
  end;
  for b:=  to  do
  begin
    if Random() <  then Result := Result + chr(RandomRange(,))
    else Result := Result + chr(RandomRange(,));
  end;
  Result := Result + '}';
end;

function genkey :string;
const
  Chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
var
  S: string;
  i, N: integer;
begin
  Randomize;
  S := '';
  for i :=  to  do begin
    N := Random(Length(Chars)) + ;
    S := S + Chars[N];
  end;
  result := S;
end;

function genkey2(c:integer) :string;
const
  Chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
var
  S: string;
  i, N: integer;
begin
  if c <  then c := ;
  Randomize;
  S := '';
  for i :=  to c do begin
    N := Random(Length(Chars)) + ;
    S := S + Chars[N];
  end;
  result := S;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
memo1.Lines.Add(GenID);
memo1.Lines.Add(genkey);
memo1.Lines.Add(genkey2());
end;