unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, TeEngine, Series, ExtCtrls, TeeProcs, Chart;

type
  TForm1 = class(TForm)
    Chart1: TChart;
    RadioButton1: TRadioButton;
    RadioButton2: TRadioButton;
    RadioButton3: TRadioButton;
    RadioButton4: TRadioButton;
    Label1: TLabel;
    Label2: TLabel;
    Edit1: TEdit;
    Edit2: TEdit;
    Button1: TButton;
    Label3: TLabel;
    Edit3: TEdit;
    Series1: TPointSeries;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}


procedure TForm1.Button1Click(Sender: TObject);
var a,b,x,y,p,f,R,temp:double;
begin
  Chart1.BottomAxis.Automatic := true;
  Chart1.LeftAxis.Automatic := true;
  Series1.Clear;
  a:= StrToFloat(Edit1.Text);
  b:= StrToFloat(Edit2.Text);

  if RadioButton1.Checked then
    begin
      R:= StrToFloat(Edit3.Text);
      x:= -100;
      while x < 100 do
        begin
          x:=x+0.02;
          temp:=sqr(R)-sqr((x-a));
          if temp>=0 then
            begin
            y:= b - sqrt(temp);
            Series1.AddXY(x,y);
            y:= b + sqrt(temp);
            Series1.AddXY(x,y);
            end;
        end;


      Chart1.SaveToBitmapFile('first.bmp');
    end;

  if RadioButton2.Checked then
    begin
      Chart1.LeftAxis.SetMinMax(-abs(int(2*a*b)),abs(int(2*a*b)));
      f:= -pi;
      while f < pi do
        begin
          f:=f+0.01;
          temp:= cos(f);
          if temp <>0 then
            begin
            p:=a*(b*temp+1/temp);
            x:=p*cos(f);
            y:=p*sin(f);
            Series1.AddXY(x,y);
            end;

        end;

      Chart1.SaveToBitmapFile('second.bmp');
    end;

  if RadioButton3.Checked then
    begin
      f:= -50;
      while f < 50 do
        begin
          f:=f+0.02;
          x:=(a+b)*sin(f)-b*sin((a/b+1)*f);
          y:=(a+b)*cos(f)-b*cos((a/b+1)*f);
          Series1.AddXY(x,y);
        end;


      Chart1.SaveToBitmapFile('third.bmp');
    end;

  if RadioButton4.Checked then
    begin
      x:= -1;
      while x < 1 do
        begin
          x:=x+0.001;
          temp:=  1-sqr(x);
          if temp>=0 then
            begin
            y:= sqrt(abs(x))+sqrt(temp);
            Series1.AddXY(x,y);
            y:= sqrt(abs(x))- sqrt(temp);
            Series1.AddXY(x,y);
            end;
        end;

      Chart1.SaveToBitmapFile('four.bmp');
    end;
end;


end.