Многопоточное вычисление количества сочетаний (комбинаторика)

unit Unit1;
 
interface
 
uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls,Unit2,Unit3,Unit4;
 
type
  TForm1 = class(TForm)
    Label1: TLabel;
    Edit1: TEdit;
    Label2: TLabel;
    Label3: TLabel;
    Edit2: TEdit;
    Label4: TLabel;
    Edit3: TEdit;
    Label5: TLabel;
    Edit4: TEdit;
    Label6: TLabel;
    Label7: TLabel;
    Label8: TLabel;
    Label9: TLabel;
    Label10: TLabel;
    Label11: TLabel;
    Label12: TLabel;
    Button1: TButton;
    Memo1: TMemo;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;
 
var
  Form1: TForm1;
  n,k,z:integer;c:real; res1,res2,res3:Extended;FS1,FS2,FS3:TThread;
implementation
 
{$R *.dfm}
 
 
 
procedure TForm1.Button1Click(Sender: TObject);
begin
Edit3.Text:=Edit1.Text;
Edit4.Text:=Edit2.Text;
n:=StrToInt(Edit1.Text);
k:=StrToInt(Edit2.Text);
FS1:=p1.Create(false);
FS1.WaitFor;
FS2:=p2.Create(false);
FS2.WaitFor;
FS3:=p3.Create(false);
FS3.WaitFor;
 
c:=res1/(res2*res3);
label12.Caption:=floattostr(c);
Memo1.Lines.Clear;
Memo1.Lines.Add('res1= '+FloatToStr(res1));
Memo1.Lines.Add('res2= '+FloatToStr(res2));
Memo1.Lines.Add('res3= '+FloatToStr(res3));
Memo1.Lines.Add('c= '+FloatToStr(c));
end;
 
end.

unit Unit2;
 
interface
 
uses
  Classes;
 
type
  p1 = class(TThread)
  private
    { Private declarations }
  protected
    procedure Execute; override;
  end;
 
implementation
     uses Unit1;
{ Important: Methods and properties of objects in visual components can only be
  used in a method called using Synchronize, for example,
 
      Synchronize(UpdateCaption);
 
  and UpdateCaption could look like,
 
    procedure p1.UpdateCaption;
    begin
      Form1.Caption := 'Updated in a thread';
    end; }
 
{ p1 }
 
procedure p1.Execute;//для н!
var i:integer;
begin
res1:=1;
for i:=1 to n do
 res1:=res1*i;
end;
 
end.

unit Unit3;
 
interface
 
uses
  Classes;
 
type
  p2 = class(TThread)
  private
    { Private declarations }
  protected
    procedure Execute; override;
  end;
 
implementation
 uses Unit1;
{ Important: Methods and properties of objects in visual components can only be
  used in a method called using Synchronize, for example,
 
      Synchronize(UpdateCaption);
 
  and UpdateCaption could look like,
 
    procedure p2.UpdateCaption;
    begin
      Form1.Caption := 'Updated in a thread';
    end; }
 
{ p2 }
 
procedure p2.Execute;
var i:integer; // для к!
begin
res2:=1;
for i:=1 to k do
 res2:=res2*i;
end;
 
end.

unit Unit4;
 
interface
 
uses
  Classes;
 
type
  p3 = class(TThread)
  private
    { Private declarations }
  protected
    procedure Execute; override;
  end;
 
implementation
  uses Unit1;
{ Important: Methods and properties of objects in visual components can only be
  used in a method called using Synchronize, for example,
 
      Synchronize(UpdateCaption);
 
  and UpdateCaption could look like,
 
    procedure p3.UpdateCaption;
    begin
      Form1.Caption := 'Updated in a thread';
    end; }
 
{ p3 }
 
procedure p3.Execute; // для (н-к)!
var i:integer;
begin
z:=n-k;
res3:=1;
for i:=1 to z do
 res3:=res3*i;
end;
 
end.