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| unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;
type
TForm1 = class(TForm)
edt1: TEdit;
edt2: TEdit;
edt3: TEdit;
edt4: TEdit;
mmo1: TMemo;
btn1: TButton;
btn2: TButton;
mmo2: TMemo;
mmo3: TMemo;
mmo4: TMemo;
lbl1: TLabel;
lbl2: TLabel;
lbl3: TLabel;
lbl4: TLabel;
lbl5: TLabel;
lbl6: TLabel;
lbl7: TLabel;
lbl8: TLabel;
lbl9: TLabel;
procedure FormCreate(Sender: TObject);
procedure btn1Click(Sender: TObject);
procedure btn2Click(Sender: TObject);
procedure edt1KeyPress(Sender: TObject; var Key: Char);
procedure edt2KeyPress(Sender: TObject; var Key: Char);
procedure edt3KeyPress(Sender: TObject; var Key: Char);
procedure edt4KeyPress(Sender: TObject; var Key: Char);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
procedure TForm1.FormCreate(Sender: TObject);
begin
edt1.Text:='';
edt2.Text:='';
edt3.Text:='';
edt4.Text:='';
mmo1.Clear;
mmo2.Clear;
mmo3.Clear;
mmo4.Clear;
end;
procedure TForm1.btn1Click(Sender: TObject);
var
x, xn, xk, s, delta_x, t, eps, f: Real;
n: Word;
begin
if edt1.Text > edt2.Text then
begin
ShowMessage('xn<xk!!!');
Exit;
end;
xn:= strtofloat(edt1.Text);
xk:= strtofloat(edt2.Text);
delta_x:=strtofloat(edt3.Text);
eps:=strtofloat(edt4.Text);
if delta_x > (xk-xn) then
begin
ShowMessage('delta_<(xk-xn)!!!');
Exit;
end;
x:=xn;
while x<=xk+delta_x/2 do
begin
n:=0;
t:=1;
s:=t;
while Abs(t)>=eps do
begin
n:=n+1;
t:=-t*x/n;
s:=s+t;
f:=1/(Exp(x));
if eps = 0 then
begin
ShowMessage('eps<>0!!!');
Exit;
end;
end;
mmo1.Lines.Add(FloatToStrF(x,ffFixed,6,2));
mmo2.Lines.Add(FloatToStrF(n,ffFixed,6,2));
mmo3.Lines.Add(FloatToStrF(s,ffFixed,6,2));
mmo4.Lines.Add(FloatToStrF(f,ffFixed,6,2));
x:=x+delta_x;
end;
end;
procedure TForm1.btn2Click(Sender: TObject);
begin
mmo1.Clear;
mmo2.Clear;
mmo3.Clear;
mmo4.Clear;
end;
procedure TForm1.edt1KeyPress(Sender: TObject; var Key: Char);
begin
if not (Key in ['0'..'9', #8, #44]) then
key:=#0;
end;
procedure TForm1.edt2KeyPress(Sender: TObject; var Key: Char);
begin
if not (Key in ['0'..'9', #8, #44]) then
key:=#0;
end;
procedure TForm1.edt3KeyPress(Sender: TObject; var Key: Char);
begin
if not (Key in ['0'..'9', #8, #44, #45]) then
key:=#0;
end;
procedure TForm1.edt4KeyPress(Sender: TObject; var Key: Char);
begin
if not (Key in ['0'..'9', #8, #44]) then
Key:=#0;
end;
end. |
(
