Hello all, I have an error at my axis of my TChart, I want the axis, only showing the integer value, and if I get a float, I want it to write a dot (.)

Here is the error :

Link

Here is my listing program :

Code:
procedure TForm1.FormCreate(Sender: TObject);
begin
daya := 10;
ai := 0.5;
end;

procedure TForm1.Timer2Timer(Sender: TObject);
begin

  Shape2.Visible := True;
  Shape2.Left := Min(Shape2.Left+1, Image3.Left+22);


   if Shape2.Left >= 192 then
  begin
  a0 := (Shape2.Left-192) DIV 15;
  b0 := (Shape2.Left-192) / 15;
  c0 := b0-a0;
  daya := daya-ai;

 if g0 = 1 then
    begin
      Chart1.Series[0].Add(daya,inttostr(a0));
      Form2.Chart1.Series[0].Add(daya,inttostr(a0));
    end
  else  Chart1.Series[0].Add(daya,'.');
  end;
end;
Can someone give me a solution please? Thanks..