unit Unit13;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, Grids;

type
  TForm13 = class(TForm)
    SG1: TStringGrid;
    kolstrok: TLabel;
    Label2: TLabel;
    Edit1: TEdit;
    Edit2: TEdit;
    Button1: TButton;
    Edit3: TEdit;
    Button2: TButton;
    Button3: TButton;
    Button4: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure Edit1Change(Sender: TObject; var Key: Char);
    procedure Edit2Change(Sender: TObject; var Key: Char);
    procedure Edit3Change(Sender: TObject; var Key: Char);
    procedure Button4Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form13: TForm13;
  n,m,i,j,code:integer;
a,b:real;
x:array[1..60,1..60] of real;
xs:array[1..60] of real;
implementation

{$R *.dfm}

procedure TForm13.Button1Click(Sender: TObject);
begin
val(edit1.Text,n,code);
val(edit2.Text,m,code);
SG1.RowCount:=n+1;
j:=1;
SG1.ColCount:=m;
i:=1;
edit3.SetFocus;
end;

procedure TForm13.Button2Click(Sender: TObject);
begin
  val(Edit3.text,x[j][i],code);
SG1.Cells[j-1,i-1]:=Edit3.text;
i:=i+1;
if(i > n) then
begin
i:=1;
j:=j+1;
end;
if j > m then
begin
j:=1;
i:=1;
end;
edit3.SetFocus;
end;

procedure TForm13.Button3Click(Sender: TObject);
var s:string;
begin
   for j:=1 to m do
begin
xs[j]:=0.;
for i:=1 to n do xs[j]:=xs[j]+x[j][i];
xs[j]:=xs[j]/n;
str(xs[j]:8:3,s);
SG1.Cells[j-1,n]:=s;
end;
end;

procedure TForm13.Button4Click(Sender: TObject);
begin
  val(Edit3.text,x[j][i],code);
SG1.Cells[j-1,i-1]:='';
i:=i+1;
if(i > n) then
begin
i:=1;
j:=j+1;
end;
if j > m then
begin
j:=1;
i:=1;
//for i := 0 to strtoint(Edit3.Text) - do

end;
edit3.SetFocus;
end;

procedure TForm13.Edit1Change(Sender: TObject; var Key: Char);
begin
   case key of '0'..'9','-',chr(8):;
'.': if pos('.',edit1.text)<>0 then key:=chr(0);
chr(13): edit2.SetFocus;
else key:=chr(0)
   end;
end;

procedure TForm13.Edit2Change(Sender: TObject; var Key: Char);
begin
   case key of '0'..'9','-',chr(8):;
'.': if pos('.',edit2.text)<>0 then key:=chr(0);
chr(13): edit2.SetFocus;
else key:=chr(0) end;
end;

procedure TForm13.Edit3Change(Sender: TObject; var Key: Char);
begin
   case key of '0'..'9','-',chr(8):;
'.': if pos('.',edit3.text)<>0 then key:=chr(0);
chr(13): edit3.SetFocus;
else key:=chr(0) end;
end;

end.