■ 재귀적으로 하노이 탑 문제를 푸는 방법을 보여준다.
▶ MainForm.cs
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using System; using System.Collections.Generic; using System.Drawing; using System.Drawing.Drawing2D; using System.Linq; using System.Runtime.InteropServices; using System.Security; using System.Threading; using System.Windows.Forms; namespace TestProject { /// <summary> /// 메인 폼 /// </summary> public partial class MainForm : Form { //////////////////////////////////////////////////////////////////////////////////////////////////// Structure ////////////////////////////////////////////////////////////////////////////////////////// Public #region 네이티브 메시지 - NativeMessage /// <summary> /// 네이티브 메시지 /// </summary> [StructLayout(LayoutKind.Sequential)] public struct NativeMessage { /// <summary> /// 핸들 /// </summary> public IntPtr Handle; /// <summary> /// 메시지 /// </summary> public uint Message; /// <summary> /// WORD 매개 변수 /// </summary> public IntPtr WordParameter; /// <summary> /// LONG 매개 변수 /// </summary> public IntPtr LongParameter; /// <summary> /// 타임 /// </summary> public uint Time; /// <summary> /// 포인트 /// </summary> public Point Point; } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Import ////////////////////////////////////////////////////////////////////////////////////////// Static //////////////////////////////////////////////////////////////////////////////// Private #region 메시지 엿보기 - PeekMessage(message, handle, minimumFilter, maximumFilter, flag) /// <summary> /// 메시지 엿보기 /// </summary> /// <param name="message">네이티브 메시지</param> /// <param name="handle">핸들</param> /// <param name="minimumFilter">최소 필터</param> /// <param name="maximumFilter">최대 필터</param> /// <param name="flag">플래그</param> /// <returns>처리 결과</returns> [SuppressUnmanagedCodeSecurity] [return: MarshalAs(UnmanagedType.Bool)] [DllImport("User32.dll", CharSet = CharSet.Auto, SetLastError = true)] private static extern bool PeekMessage(out NativeMessage message, IntPtr handle, uint minimumFilter, uint maximumFilter, uint flag); #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Private #region Field /// <summary> /// WM_MOUSEFIRST /// </summary> private const uint WM_MOUSEFIRST = 0x0200; /// <summary> /// WM_MOUSELAST /// </summary> private const uint WM_MOUSELAST = 0x020D; /// <summary> /// PM_REMOVE /// </summary> private const int PM_REMOVE = 0x0001; /// <summary> /// 지연 시간 /// </summary> private const int DELAY = 250; /// <summary> /// 디스크 카운트 /// </summary> private const int DISK_COUNT = 5; /// <summary> /// Y1 좌표 /// </summary> private const int Y1 = 10; /// <summary> /// Y2 좌표 /// </summary> private const int Y2 = 50; /// <summary> /// 디스크 두께 /// </summary> private const int DISK_THICKNESS = 20; /// <summary> /// X1 좌표 /// </summary> private int x1; /// <summary> /// X2 좌표 /// </summary> private int x2; /// <summary> /// X3 좌표 /// </summary> private int x3; /// <summary> /// Y3 좌표 /// </summary> private int y3; /// <summary> /// 못 사각형 배열 /// </summary> private Rectangle[] pegRectangleArray = new Rectangle[3]; /// <summary> /// 못 스택 /// </summary> private Stack<int>[] pegStack = new Stack<int>[3]; /// <summary> /// 점유 못 카운트 /// </summary> private int occupiedPegCount = 0; /// <summary> /// 이동 여부 /// </summary> private bool isMoving = false; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - MainForm() /// <summary> /// 생성자 /// </summary> public MainForm() { InitializeComponent(); } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Private //////////////////////////////////////////////////////////////////////////////// Event #region 폼 로드시 처리하기 - Form_Load(sender, e) /// <summary> /// 폼 로드시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void Form_Load(object sender, EventArgs e) { for(int i = 0; i < 3; i++) { this.pegStack[i] = new Stack<int>(); } int diskWidth = (DISK_COUNT + 2) * DISK_THICKNESS; ClientSize = new Size(3 * diskWidth + 4 * DISK_THICKNESS, ClientSize.Height); this.x1 = (int)(DISK_THICKNESS + diskWidth / 2); this.x2 = this.x1 + diskWidth + DISK_THICKNESS; this.x3 = this.x2 + diskWidth + DISK_THICKNESS; this.y3 = ClientSize.Height - 10; this.pegRectangleArray[0] = new Rectangle(this.x1 - DISK_THICKNESS / 2, Y2, DISK_THICKNESS, this.y3 - Y2); this.pegRectangleArray[1] = new Rectangle(this.x2 - DISK_THICKNESS / 2, Y2, DISK_THICKNESS, this.y3 - Y2); this.pegRectangleArray[2] = new Rectangle(this.x3 - DISK_THICKNESS / 2, Y2, DISK_THICKNESS, this.y3 - Y2); for(int i = 0; i < DISK_COUNT; i++) { this.pegStack[0].Push(diskWidth); diskWidth -= DISK_THICKNESS; } this.occupiedPegCount = 0; } #endregion #region 폼 마우스 이동시 처리하기 - Form_MouseMove(sender, e) /// <summary> /// 폼 마우스 이동시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void Form_MouseMove(object sender, MouseEventArgs e) { int pegUnderMouse = GetPeg(e.Location); if(pegUnderMouse < 0) { Cursor = Cursors.Default; } else { Cursor = Cursors.Cross; } } #endregion #region 폼 마우스 클릭시 처리하기 - Form_MouseClick(sender, e) /// <summary> /// 폼 마우스 클릭시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void Form_MouseClick(object sender, MouseEventArgs e) { if(this.isMoving) { return; } int pegUnderMouse = GetPeg(e.Location); if(pegUnderMouse < 0) { return; } this.isMoving = true; Cursor = Cursors.WaitCursor; Application.DoEvents(); int otherPeg = 0; if(this.occupiedPegCount != 1 && pegUnderMouse != 1) { otherPeg = 1; } if(this.occupiedPegCount != 2 && pegUnderMouse != 2) { otherPeg = 2; } MoveDisk(this.occupiedPegCount, pegUnderMouse, otherPeg, DISK_COUNT); this.occupiedPegCount = pegUnderMouse; Cursor = Cursors.Default; this.isMoving = false; FlushMouseMessages(); } #endregion #region 폼 페인트시 처리하기 - Form_Paint(sender, e) /// <summary> /// 폼 페인트시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void Form_Paint(object sender, PaintEventArgs e) { e.Graphics.Clear(BackColor); e.Graphics.SmoothingMode = SmoothingMode.AntiAlias; DrawPeg(e.Graphics); DrawDisk(e.Graphics); } #endregion //////////////////////////////////////////////////////////////////////////////// Function #region 못 구하기 - GetPeg(location) /// <summary> /// 못 구하기 /// </summary> /// <param name="location">위치</param> /// <returns>못 인덱스</returns> private int GetPeg(Point location) { if(this.isMoving) { return -1; } for(int i = 0; i < 3; i++) { if(this.pegRectangleArray[i].Contains(location)) { if(i == this.occupiedPegCount) { return -1; } return i; } } return -1; } #endregion #region 디스크 이동하기 - MoveDisk(fromPeg, toPeg, otherPeg, diskCount) /// <summary> /// 디스크 이동하기 /// </summary> /// <param name="fromPeg">FROM 못</param> /// <param name="toPeg">TO 못</param> /// <param name="otherPeg">다른 못</param> /// <param name="diskCount">디스크 카운트</param> private void MoveDisk(int fromPeg, int toPeg, int otherPeg, int diskCount) { if(diskCount > 1) { MoveDisk(fromPeg, otherPeg, toPeg, diskCount - 1); } this.pegStack[toPeg].Push(this.pegStack[fromPeg].Pop()); Refresh(); Thread.Sleep(DELAY); if(diskCount > 1) { MoveDisk(otherPeg, toPeg, fromPeg, diskCount - 1); } } #endregion #region 마우스 메시지 제거하기 - FlushMouseMessages() /// <summary> /// 마우스 메시지 제거하기 /// </summary> private void FlushMouseMessages() { NativeMessage message; while(PeekMessage(out message, IntPtr.Zero, WM_MOUSEFIRST, WM_MOUSELAST, PM_REMOVE)); } #endregion #region 못 그리기 - DrawPeg(graphics) /// <summary> /// 못 그리기 /// </summary> /// <param name="graphics">그래픽스</param> private void DrawPeg(Graphics graphics) { for(int i = 0; i < 3; i++) { graphics.FillRectangle(Brushes.Orange, this.pegRectangleArray[i]); graphics.DrawRectangle(Pens.Red, this.pegRectangleArray[i]); } } #endregion #region 디스크 그리기 - DrawDisk(graphics) /// <summary> /// 디스크 그리기 /// </summary> /// <param name="graphics">그래픽스</param> private void DrawDisk(Graphics graphics) { for(int peg = 0; peg < 3; peg++) { int y = this.y3 - 2 - DISK_THICKNESS; foreach(int diskWidth in this.pegStack[peg].ToArray().Reverse()) { Rectangle diskRectangle = new Rectangle ( this.pegRectangleArray[peg].X + DISK_THICKNESS / 2 - diskWidth / 2, y, diskWidth, DISK_THICKNESS ); graphics.FillRectangle(Brushes.LightGreen, diskRectangle); graphics.DrawRectangle(Pens.Green, diskRectangle); y -= DISK_THICKNESS + 2; } } } #endregion } } |
