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| unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, Buttons, ExtCtrls, Menus;
type
TForm1 = class(TForm)
Image1: TImage;
BitBtn4: TBitBtn;
btn1: TButton;
btn3: TButton;
Edit1: TEdit;
Button1: TButton;
Button2: TButton;
procedure BitBtn4Click(Sender: TObject);
procedure btn1Click(Sender: TObject);
procedure btn3Click(Sender: TObject);
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
type
uktr=^uz;
uz=record
data:integer;
row,col,col1:integer; {kol2-âî âðåìÿ îáõîäà}
ur:integer;
left,right:uktr;
end;
var
Form1: TForm1;
kor:uktr;
ver:uz;
ft :text;
n,i,k,k1,l,r:integer;
fout:TextFile;
implementation
{$R *.dfm}
function st2(n:integer):integer;
//Степень 2 необходимая для вывода изображения дерева
var
m,j:integer;
begin
m:=1;
for j:=1 to n do
m:=m*2;
st2:=m;
end;
procedure addtree(var base:uktr;inf:integer);
//Добавление узла
begin
if base=nil then
begin
new(base);
base^.data:=inf;
base^.left:=nil;
base^.right:=nil;
base^.row:=l;
base^.col:=k;
base^.col1:=k1;
base^.ur:=r;
end
else
begin
inc(r);
l:=base^.row+8;
if base^.data>inf then
begin
k:=base^.col -st2(4-base^.ur);
k1:=base^.col-st2(3-base^.ur);
addtree(base^.left,inf);
end
else
begin
k:=base^.col+st2(4-base^.ur);
k1:=base^.col+st2(3-base^.ur);
addtree(base^.right,inf);
end
end;
end;
procedure TForm1.BitBtn4Click(Sender: TObject);
begin
Close;
end;
procedure TForm1.btn1Click(Sender: TObject);
var
ft:TextFile;
begin
assignfile(ft,'tree1.txt');
reset(ft);
k:=32;
l:=1;
Чтение элементов из файла и добавление их в дерево
while not eoln(ft) do
begin
r:=0;
read(ft,ver.data);
addtree(kor,ver.data);
end;
closefile(ft);
end;
procedure obchod3(base:uktr);
//Обход для вывода изображения дерева
var
dt:string;
begin
if base<>nil then
begin
obchod3(base^.left);
with Form1.Image1 do
begin
dt:=IntToStr(base^.data);
canvas.Ellipse(base^.col*10-20,base^.row*10,base^.col*10+20,base^.row*10+40);
canvas.TextOut(base^.col*10-5,base^.row*10+13,dt);
canvas.moveTo(base^.col*10,base^.row*10);
if base^.ur>0 then
begin
if base^.col<base^.col1 then
canvas.lineTo(base^.col1*10+st2(4-base^.ur)*10,base^.row*10-40)
else
canvas.lineTo(base^.col1*10-st2(4-base^.ur)*10,base^.row*10-40);
end;
obchod3(base^.right);
end;
end;
if kor=nil then
begin
with Form1.Image1 do
begin
canvas.Ellipse(10+310,10*5,10*5+310,10);
canvas.TextOut(10*20+133,2*10,'nil');
canvas.moveTo(338,50);
canvas.lineTo(320,75);
canvas.moveTo(338,50);
canvas.lineTo(360,75);
end;
end;
end;
procedure TForm1.btn3Click(Sender: TObject);
begin
Image1.Canvas.Brush.Color:=clwhite;
Image1.Canvas.FillRect(ClientRect);
Image1.Canvas.Brush.Color:=clred;
Image1.Canvas.Font.Color:=clwhite;
Image1.Canvas.Pen.Width:=2;
Image1.Canvas.Pen.Color:=clgreen;
obchod3(kor);
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
Image1.Canvas.Brush.Color:=clwhite;
Image1.Canvas.FillRect(ClientRect);
r:=0;
ver.data:=strtoint(edit1.text);
addtree(kor,ver.data);
Image1.Canvas.Brush.Color:=clred;
Image1.Canvas.Font.Color:=clwhite;
Image1.Canvas.Pen.Width:=2;
Image1.Canvas.Pen.Color:=clgreen;
obchod3(kor);
end;
procedure TForm1.Button2Click(Sender: TObject);
begin
end;
end. |
(
