Eight Queen Problem/da_answer

~cpp 
<script>
unit Unit1;

interface

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

const
  CBoardSize = 8;

type
  TQueenPos = record
    X: integer;
    Y: integer;
  end;

  TForm1 = class(TForm)
    Memo1: TMemo;
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    procedure SearchStart();
    function getNextQueenPos(index, X, Y:integer):boolean;
    function checkRule(X,Y:integer):boolean;
    { Private declarations }
  public
    QueenPosArr: array of TQueenPos;
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
  SearchStart();
end;

procedure TForm1.SearchStart();
var
  i, j: integer;
begin
  setLength(QueenPosArr, CBoardSize);
  for i:=0 to CBoardSize-1 do
  begin
    QueenPosArr[i].X := -1;
    QueenPosArr[i].Y := -1;
  end;

  for i:=0 to CBoardSize-1 do
  begin
    QueenPosArr[0].X := 0;
    QueenPosArr[0].Y := i;
    showMessage(inttostr(i));
    if getNextQueenPos(0, QueenPosArr[i].X, QueenPosArr[i].Y) then
    begin
      for j:=0 to CBoardSize-1 do
      begin
        showMessage(inttostr(QueenPosArr[j].X)+'-'+inttostr(QueenPosArr[j].Y));
      end;
    end
    else
    begin

    end;
 end;
end;

function TForm1.getNextQueenPos(index, X, Y:integer):boolean;
var
  i: integer;
  nowIndex: integer;
begin
  for i:=0 to CBoardSize-1 do
  begin
    nowIndex := index+1;
    QueenPosArr[nowIndex].X := nowIndex;
    QueenPosArr[nowIndex].Y := i;
    if checkRule(QueenPosArr[nowIndex].X, QueenPosArr[nowIndex].Y) then
    begin
      if nowIndex = 7 then
      begin
        result := true;
        exit;
      end
      else
      begin
        if getNextQueenPos(nowIndex, QueenPosArr[nowIndex].X, QueenPosArr[nowIndex].Y) then
        begin
          result := true;
          exit;
        end
        else
        begin
          QueenPosArr[nowIndex].X := -1;
          QueenPosArr[nowIndex].Y := -1;
        end;
      end;
    end
    else
    begin
      QueenPosArr[nowIndex].X := -1;
      QueenPosArr[nowIndex].Y := -1;
      if i = CBoardSize-1 then
      begin
        result := false;
      end;
    end;
  end;
end;

function TForm1.checkRule(X,Y:integer):boolean;
var
  i: integer;
begin
  for i:=0 to X-1 do
  begin
    if QueenPosArr[i].X > -1 then
    begin
      if (X=QueenPosArr[i].X) or (Y=QueenPosArr[i].Y) or ((Y-X)=(QueenPosArr[i].Y-QueenPosArr[i].X)) or ((Y+X)=(QueenPosArr[i].Y+QueenPosArr[i].X)) then
      begin
        result := false;
        exit;
      end;
    end;
  end;
  result := true;
end;

end.

~cpp 
<script>
unit Unit1;

interface

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

const
  CBoardSize = 8;

type
  TQueenPos = record
    X: integer;
    Y: integer;
  end;

  TForm1 = class(TForm)
    Memo1: TMemo;
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    procedure SearchStart();
    function getNextQueenPos(index, X, Y:integer):boolean;
    function checkRule(X,Y:integer):boolean;
    { Private declarations }
  public
    QueenPosArr: array of TQueenPos;
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
  SearchStart();
end;

procedure TForm1.SearchStart();
var
  i: integer;                          // <------ 변��� ������...
begin
  setLength(QueenPosArr, CBoardSize);
  for i:=0 to CBoardSize-1 do
  begin
    QueenPosArr[i].X := -1;
    QueenPosArr[i].Y := -1;
  end;

  for i:=0 to CBoardSize-1 do
  begin
    QueenPosArr[0].X := 0;
    QueenPosArr[0].Y := i;
    showMessage(inttostr(i));
    if getNextQueenPos(0, QueenPosArr[i].X, QueenPosArr[i].Y) then
    begin

    end
    else
    begin

    end;
 end;
end;

function TForm1.getNextQueenPos(index, X, Y:integer):boolean;
var
  i, j: integer;                //<------- 변��� ������
  nowIndex: integer;
begin
  for i:=0 to CBoardSize-1 do
  begin
    nowIndex := index+1;
    QueenPosArr[nowIndex].X := nowIndex;
    QueenPosArr[nowIndex].Y := i;
    if checkRule(QueenPosArr[nowIndex].X, QueenPosArr[nowIndex].Y) then
    begin
      if nowIndex = 7 then
      begin

//************************************* ������������ ���������는 방�������� 변���
        for j:=0 to CBoardSize-1 do
        begin
          showMessage(inttostr(QueenPosArr[j].X)+'-'+inttostr(QueenPosArr[j].Y));
        end;
//*************************************
        result := true;
        exit;
      end
      else
      begin
        if getNextQueenPos(nowIndex, QueenPosArr[nowIndex].X, QueenPosArr[nowIndex].Y) then
        begin
          result := true;
          exit;
        end
        else
        begin
          QueenPosArr[nowIndex].X := -1;
          QueenPosArr[nowIndex].Y := -1;
        end;
      end;
    end
    else
    begin
      QueenPosArr[nowIndex].X := -1;
      QueenPosArr[nowIndex].Y := -1;
      if i = CBoardSize-1 then
      begin
        result := false;
      end;
    end;
  end;
end;

function TForm1.checkRule(X,Y:integer):boolean;
var
  i: integer;
begin
  for i:=0 to X-1 do
  begin
    if QueenPosArr[i].X > -1 then
    begin
      if (X=QueenPosArr[i].X) or (Y=QueenPosArr[i].Y) or ((Y-X)=(QueenPosArr[i].Y-QueenPosArr[i].X)) or ((Y+X)=(QueenPosArr[i].Y+QueenPosArr[i].X)) then
      begin
        result := false;
        exit;
      end;
    end;
  end;
  result := true;
end;

end.