Код
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;
type
TForm1 = class(TForm)
Memo1: TMemo;
Memo2: TMemo;
Button1: TButton;
Button2: TButton;
Button3: TButton;
procedure Button1Click(Sender: TObject);
procedure Button3Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
var f,g:textfile;
i,j,k:integer;
ch:char;
procedure TForm1.Button1Click(Sender: TObject);
begin
memo1.Lines.SaveToFile('c:\f.txt');
end;
procedure TForm1.Button3Click(Sender: TObject);
begin
memo2.Lines.LoadFromFile('c:\g.txt');
end;
procedure TForm1.Button2Click(Sender: TObject);
begin
k:=0;
AssignFile(f,'c:\f.txt');
AssignFile(g,'c:\g.txt');
reset(f);
rewrite(g);
While not EOF(f) do begin
read(f,ch);
inc(k);
if ch='b' then begin
reset(f);
while i<>k do begin
inc(i);
read(f,ch);
if i=k-1 then write(g,ch);
end;
end;
end;
CloseFile(f);
CloseFile(g);
end;
end.