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« : 06-02-2011 10:30 »  |
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листинг:
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, Math, StdCtrls;
type
TForm1 = class(TForm)
btn1: TButton;
lbl1: TLabel;
edt1: TEdit;
lbl2: TLabel;
edt2: TEdit;
lbl3: TLabel;
lbl4: TLabel;
lbl5: TLabel;
lbl6: TLabel;
lbl7: TLabel;
procedure btn1Click(Sender: TObject);
procedure edt1KeyPress(Sender: TObject; var Key: Char);
procedure edt2KeyPress(Sender: TObject; var Key: Char);
private
function factorial(N:Real):Real;
function chislsoch (x, y: Real): Real;
function engset(A,M,N: Real): Real;
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
i,N,M:Integer;
x,y,z,znam,chisl: Real;
implementation
{$R *.dfm}
{ TForm1 }
function TForm1.factorial(N: Real): Real;
begin
if n = 1 then
factorial:= 1
else
factorial:= n*factorial(n-1);
end;
function TForm1.chislsoch(x, y: Real): Real;
begin
chislsoch:= factorial(y)/(factorial(y-x)*factorial(x));
end;
procedure TForm1.btn1Click(Sender: TObject);
begin
if (Edt1.Text='') or (Edt2.Text='') then lbl1.Caption:=('ââåäèòå çíà÷åíèå')
else begin
N:=StrToInt(Edt1.Text);
M:=StrToInt(Edt2.Text);
if N>M then lbl1.Caption:=('íå âîçìîæíî,M>N')
else begin
Lbl1.Caption:=floattostr(factorial(N));
Lbl2.Caption:=floattostr(chislsoch(N,M));
Lbl7.Caption:=floattostr(engset(2,N,M));
end
end;
end;
procedure TForm1.edt1KeyPress(Sender: TObject; var Key: Char);
begin
if not (key in['1'..'9',decimalseparator,#8]) then key:=#0; //ðàçðåøàåì ââîäèòü òîëüêî ÷èñëà
end;
procedure TForm1.edt2KeyPress(Sender: TObject; var Key: Char);
begin
if not (key in['2'..'9',decimalseparator,#8]) then key:=#0; //ðàçðåøàåì ââîäèòü òîëüêî ÷èñëà
end;
function TForm1.engset(A,M,N: Real): Real;
begin
engset:= (chislsoch(N,M-1)*Power(A,N))/znam;
znam := 1;
for z:=1 to N do begin
znam:=znam+chislsoch(z,M-1)*Power(A,z);
end;
end;
end.
ошибка в функции engset
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