?? fibonacciunit.~pas
字號:
unit fibonacciunit;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, Buttons, ExtCtrls;
type
TForm1 = class(TForm)
Edit2: TEdit;
Button1: TButton;
Label1: TLabel;
Label2: TLabel;
BitBtn1: TBitBtn;
Label3: TLabel;
BitBtn2: TBitBtn;
Label4: TLabel;
Label5: TLabel;
Label6: TLabel;
Label7: TLabel;
edit1: TEdit;
procedure Button1Click(Sender: TObject);
procedure BitBtn2Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
procedure TForm1.Button1Click(Sender: TObject);
var
x,y:integer;
function fib(n:integer):integer;
begin
case n of
0:fib:=1;
1:fib:=1;
else
fib:=fib(n-1)+fib(n-2);
end;
end;
begin
edit1.SetFocus;
x:=strtoint(edit1.text);
if x<0
then showmessage('n不能為負數(shù)!')
else
begin
y:=fib(x);
edit2.text:=inttostr(y);
end;
end;
procedure TForm1.BitBtn2Click(Sender: TObject);
begin
edit1.Text:='';
edit2.Text:='';
edit1.SetFocus;
end;
end.
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