请教一点小问题；
procedure TForm1.Button1Click(Sender: TObject);
begin
ShowMessage( FloatToStr( Power(2,3) ) );
end;

end.
编译通不对，提示末声明标识符power

[解决办法]
uses Math;
[解决办法]
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls,Math;

type
TForm1 = class(TForm)
btn1: TButton;
procedure btn1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;

var
Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.btn1Click(Sender: TObject);
begin
ShowMessage( FloatToStr( Power(2,3) ) );

end;

end.