15パズルのサンプルプログラムを作成しました。

15パズルとは、1から15までの数字とスペースが配置されていて、数字をスライドさせ左上から順に1,2,3,4,5,…,15と数字をそろえるゲームです。数字の抜けている部分の上下左右をクリックすると数字をスライドすることができます。キーボードの矢印キーでも操作出来るようにしています。

プロジェクトのダウンロード

[C++コード]

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#include<windows.h>
#include"resource.h"

TCHAR szClassName[] = TEXT("15Puzzle");

#define BITMAP_WIDTH 100
#define BITMAP_HEIGHT 99
#define WM_CLICK (WM_APP+100)
#define WM_RANDOM (WM_APP+101)

HHOOK g_hHook;

LRESULT CALLBACK CBTProc(int nCode, WPARAM wParam, LPARAM lParam)
{
  if (nCode == HCBT_ACTIVATE)
  {
    UnhookWindowsHookEx(g_hHook);
    const HWND hMessageBox = (HWND)wParam;
    const HWND hParentWnd = GetParent(hMessageBox);
    RECT rectMessageBox, rectParentWnd;
    GetWindowRect(hMessageBox, &rectMessageBox);
    GetWindowRect(hParentWnd, &rectParentWnd);
    SetWindowPos(
    hMessageBox,
    hParentWnd,
    (rectParentWnd.right + rectParentWnd.left - rectMessageBox.right + rectMessageBox.left) >> 1,
    (rectParentWnd.bottom + rectParentWnd.top - rectMessageBox.bottom + rectMessageBox.top) >> 1,
    0,
    0,
    SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE);
  }
  return 0;
}

LRESULT CALLBACK WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
  static int table[16];
  static HBITMAP hBitmap[15];
  int i, j, index;
  PAINTSTRUCT ps;
  HDC hdc, hdc_mem;
  switch (msg)
  {
  case WM_CREATE:
    for (i = 0; i < 15; ++i)
    {
      table[i] = i;
      hBitmap[i] = LoadBitmap(
      ((LPCREATESTRUCT)lParam)->hInstance,
      MAKEINTRESOURCE(IDB_BITMAP1 + i)
      );
    }
    table[15] = 15;
    srand(GetTickCount());
    SendMessage(hWnd, WM_RANDOM, 0, 0);
    break;
  case WM_RANDOM:
    for (i = 0; i < 1000; ++i)
    SendMessage(hWnd, WM_CLICK, rand() % 16, 0);
    InvalidateRect(hWnd, 0, 0);
    break;
  case WM_PAINT:
    hdc = BeginPaint(hWnd, &ps);
    hdc_mem = CreateCompatibleDC(hdc);
    for (i = 0; i < 16; ++i)
    {
      if (table[i] == 15)
      {
        RECT rect;
        SetRect(
        &rect,
        i % 4 * BITMAP_WIDTH,
        i / 4 * BITMAP_HEIGHT,
        i % 4 * BITMAP_WIDTH + BITMAP_WIDTH,
        i / 4 * BITMAP_WIDTH + BITMAP_HEIGHT
        );
        ExtTextOut(hdc, 0, 0, ETO_OPAQUE, &rect, 0, 0, 0);
      }
      else
      {
        SelectObject(
        hdc_mem,
        hBitmap[table[i]]
        );
        BitBlt(
        hdc,
        i % 4 * BITMAP_WIDTH,
        i / 4 * BITMAP_HEIGHT,
        BITMAP_WIDTH,
        BITMAP_HEIGHT,
        hdc_mem,
        0,
        0,
        SRCCOPY
        );
      }
    }
    DeleteDC(hdc_mem);
    EndPaint(hWnd, &ps);
    break;
  case WM_LBUTTONDOWN:
    SendMessage(
    hWnd,
    WM_CLICK,
    LOWORD(lParam) / BITMAP_WIDTH + HIWORD(lParam) / BITMAP_HEIGHT * 4,
    1
    );
    break;
  case WM_KEYDOWN:
    for (i = 0; i < 16; ++i)
      if (table[i] == 15)
        break;
    switch (wParam)
    {
    case VK_LEFT:
      SendMessage(hWnd, WM_CLICK, i + 1, 1);
      break;
    case VK_RIGHT:
      SendMessage(hWnd, WM_CLICK, i - 1, 1);
      break;
    case VK_UP:
      SendMessage(hWnd, WM_CLICK, i + 4, 1);
      break;
    case VK_DOWN:
      SendMessage(hWnd, WM_CLICK, i - 4, 1);
      break;
    }
    break;
  case WM_CLICK:
    index = (int)wParam;
    if (table[index] == 15 || index < 0 || index > 15)
      break;
    for (i = 0; i < 4; ++i)
    {
      if (index % 4 > i&&table[index - (i + 1)] == 15)//move left
      {
        for (j = i; j >= 0; --j)table[index - (j + 1)] = table[index - j];
        table[index] = 15;
        break;
      }
      else if (index > 3 + 4 * i&&table[index - 4 * (i + 1)] == 15)//move up
      {
        for (j = i; j >= 0; --j)table[index - 4 * (j + 1)] = table[index - 4 * j];
        table[index] = 15;
        break;
      }
      else if (index % 4 < 3 - i&&table[index + (i + 1)] == 15)//move right
      {
        for (j = i; j >= 0; --j)table[index + (j + 1)] = table[index + j];
        table[index] = 15;
        break;
      }
      else if (index < 12 - i * 4 && table[index + 4 * (i + 1)] == 15)//move down
      {
        for (j = i; j >= 0; --j)table[index + 4 * (j + 1)] = table[index + 4 * j];
        table[index] = 15;
        break;
      }
    }
    if (lParam&&table[index] == 15)
    {
      InvalidateRect(hWnd, 0, 0);
      if (index == 15)
      {
        for (i = 0; i < 16; ++i)
        if (table[i] != i)
          return 0;
        g_hHook = SetWindowsHookEx(
        WH_CBT,
        CBTProc,
        NULL,
        GetCurrentThreadId()
        );
        if (IDYES == MessageBox(
        hWnd,
        TEXT("もう一度行いますか?"),
        TEXT("完成!"),
        MB_YESNO)
        )
          SendMessage(hWnd, WM_RANDOM, 0, 0);
      }
    }
    break;
  case WM_DESTROY:
    for (i = 0; i < 15; ++i)
    {
      DeleteObject(hBitmap[i]);
    }
    PostQuitMessage(0);
    break;
  default:
    return DefWindowProc(hWnd, msg, wParam, lParam);
  }
  return 0;
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPreInst, LPSTR pCmdLine, int nCmdShow)
{
  MSG msg;
  const WNDCLASS wndclass = {
    0,
    WndProc,
    0,
    0,
    hInstance,
    0,
    LoadCursor(0,IDC_ARROW),
    0,
    0,
    szClassName
  };
  RegisterClass(&wndclass);
  RECT rect;
  SetRect(&rect, 0, 0, BITMAP_WIDTH * 4, BITMAP_HEIGHT * 4);
  AdjustWindowRect(&rect, WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU, 0);
  const HWND hWnd = CreateWindow(
    szClassName,
    TEXT("15 Puzzle"),
    WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU,
    CW_USEDEFAULT,
    0,
    rect.right - rect.left,
    rect.bottom - rect.top,
    0,
    0,
    hInstance,
    0
  );
  ShowWindow(hWnd, SW_SHOWDEFAULT);
  UpdateWindow(hWnd);
  while (GetMessage(&msg, 0, 0, 0))
  {
    TranslateMessage(&msg);
    DispatchMessage(&msg);
  }
  return (int)msg.wParam;
}