| Delphi |
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| type
Stack = ^TStack;
TStack = record
key : integer;
next : Stack;
end;
type
TForm1 = class(TForm)
Button1: TButton;
Edit1: TEdit;
Button2: TButton;
Button3: TButton;
Button4: TButton;
OpenDialog1: TOpenDialog;
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
procedure Button3Click(Sender: TObject);
procedure Button4Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
s : Stack;
implementation
{$R *.dfm}
function Empty(s : stack) : boolean;
begin
if s = nil then Empty := true
else Empty := false;
end;
procedure push(var s : stack; key : integer);
var p : stack;
begin
new(p);
p^.key:= key;
p^.next := s;
s := p;
end;
procedure pop(var s : stack);
var p : stack;
begin
if not Empty(s) then begin
p := s;
s := s^.next;
dispose(p);
end
else
ShowMessage('Stack is empty');
end;
function top(s : stack) : integer;
begin
if not Empty(s) then begin
top := s^.key;
end
else
ShowMessage('Stack is empty');
end;
function Count(s : stack) : integer;
var coun : integer;
begin
coun := 0;
while not Empty(s) do begin
s := s^.next;
coun := coun + 1;
end;
Count := coun;
end;
procedure PrintS(s : stack);
begin
Form1.Edit1.Text := '';
if Empty(s) then ShowMessage('Stack is empty')
else
while not Empty(s) do begin
Form1.Edit1.Text := Form1.Edit1.Text + IntToStr(s^.key) + ' ';
s := s^.next;
end;
end;
procedure TForm1.Button1Click(Sender: TObject);
var filename : string;
buf : string;
ch : char;
f: textfile;
begin
s := nil;
if OpenDialog1.Execute then filename := OpenDialog1.FileName;
reset(f, filename);
while not eof(f) do begin
buf := '';
while (not eof(f)) and (ch in ['0'..'9']) do begin
if (ch in ['0'..'9']) then buf := buf + ch;
read(f, ch);
end;
if (not eof(f))and (buf <>'') then push(s, StrToInt(buf));
while (not eof(f)) and (not (ch in ['0'..'9'])) do
read(f, ch);
end;
closefile(f);
end;
procedure TForm1.Button2Click(Sender: TObject);
begin
PrintS(s);
end;
procedure TForm1.Button3Click(Sender: TObject);
var k: integer;
begin
Edit1.Text := '';
//Edit1.Text := IntToStr(top(s));
pop(s);
end;
procedure TForm1.Button4Click(Sender: TObject);
var k: integer;
str: string;
begin
k := Count(s);
str := IntToStr(Count(s));
ShowMessage('Stack size : ' + str);
end;
end. |
|
Этот код компилируется без ошибок и работает как должен. Но если В событии TForm1.Button3Click раскомментировать Edit1.Text := IntToStr(top(s)); появляется ошибка Missing operator or semicolon.
Помогите! Что не так?
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