[melloun]

Код:

unit grfunc_;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs;

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

var
  Form1: TForm1;

implementation

{$R *.DFM}


 Function f(x:real):real;
 begin
    f:=????????? // вот тут помогите вписать функцию факториала
 end;


procedure GrOfFunc;
var
 x1,x2:real;    
 y1,y2:real;   
 x:real;       
 y:real;        
 dx:real;       
 l,b:integer;   
 w,h:integer;   
 mx,my:real;    
 x0,y0:integer; 

begin

 l:=10;                    
 b:=Form1.ClientHeight-20;  
 h:=Form1.ClientHeight-40; 
 w:=Form1.Width-40;         

 x1:=0;     
 x2:=25;   
 dx:=0.01;  

 
 y1:=f(x1); 
 y2:=f(x1); 
 x:=x1;
 repeat
   y := f(x);
   if y < y1 then y1:=y;
   if y > y2 then y2:=y;
   x:=x+dx;
 until (x>=x2);


 my:=h/abs(y2-y1);  
 mx:=w/abs(x2-x1);  


 x0:=l;
 y0:=b-Abs(Round(y1*my));

 with form1.Canvas do
 begin
 
   MoveTo(l,b);LineTo(l,b-h);
   MoveTo(x0,y0);LineTo(x0+w,y0);
   TextOut(l+5,b-h,FloatToStrF(y2,ffGeneral,6,3));
   TextOut(l+5,b,FloatToStrF(y1,ffGeneral,6,3));

   x:=x1;
   repeat
     y:=f(x);
     Pixels[x0+Round(x*mx),y0-Round(y*my)]:=clRed;
     x:=x+dx;
   until (x>=x2);
 end;
end;


procedure TForm1.FormPaint(Sender: TObject);
begin
  GrOfFunc;
end;


procedure TForm1.FormResize(Sender: TObject);
begin

  form1.Canvas.FillRect(Rect(0,0,ClientWidth,ClientHeight));

  GrOfFunc;
end;

end.

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