unit Unit1;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
StdCtrls;
function mul(x:integer):integer;
type
TForm1 = class(TForm)
Button1: TButton;
Label1: TLabel;
procedure Button1Click(Sender: TObject);
private
public
end;
var
Form1: TForm1;
implementation
{$R *.DFM}
function mul(x:integer):integer;
begin
mul:=(x*x);
end;
procedure TForm1.Button1Click(Sender: TObject);
var
a:integer;
begin
a:=mul(3);
label1.Caption:=inttostr(a);
end;
end.