基于深度及广度优先搜索的迷宫问题的演示

#include<windows.h>
#include<iostream>
#include<ctime>
#include<stdlib.h>
#include<fstream>
#include<stack>
#include<queue>

const int CELL = 25;// 单元像素宽
const int W = 15;   // 迷宫宽度
const int H = 15;   // 迷宫高度

struct POSITION//每一个单元格的左上坐标
{
    int x;//单元格横坐标(单位pixel)
    int y;//单元格纵坐标
    int index_x;//单元格横标
    int index_y;//单元格纵标
};

struct MazeEdge//储存的是原来迷宫所拆的墙，下次生成迷宫和原来一样拆
{
    int x;
    int y;
    int z;
    int w;
};

struct Wall
{
    int wall_r;//右墙数据
    int wall_l;//左墙数据
    int wall_t;//上墙数据
    int wall_b;//下墙数据
};

LRESULT CALLBACK WndProc ( HWND, UINT, WPARAM, LPARAM);//窗口函数
void DrawWhiteGround (HDC hdc);//将整个客户区绘制为白色
void DrawRedBlock (HDC hdc, int l, int t, int r, int b);//绘制迷宫起始点与终止点
void DrawRect (HDC hdc, int l, int t, int r, int b);//绘制单元方格
void DrawCell (HDC hdc, int l, int t, int r, int b);//绘制移动方块
void DrawGamePlace(HDC hdc, int col, int row); //在客户区绘满单元格
void DrawPath(HDC hdc, int w, int h);//迷宫拆墙
bool Adj(int x, int y, bool* visited, int col);//判断该单元格是否有没有被访问的相邻单元格
bool Adj_NoWall(int x, int y, bool* visited, Wall* wall, int col);//判断该单元格是否有没有被访问的相邻单元格并且周围没有墙可以访问
void Replace (HDC hdc, int x, int y, int z, int k);//拆墙(用白色划线替换红色划线)
void WriteDocument (MazeEdge* mazeedge, Wall* wall, int i);//将迷宫拆墙数据写入txt文件中
bool ReadDocument (HDC hdc);//从txt文件中读取迷宫拆墙数据
void DFS (HDC hdc);//深度优先搜索寻找迷宫路径
void BFS (HDC hdc);//广度优先搜索寻找迷宫路径
//---------------------------------------------------------------
int WINAPI WinMain ( HINSTANCE hInstance,
      HINSTANCE hPrevInstance,
      PSTR  szCmdLine,
      int  iCmdShow)

{
 static char AppName[]="ToyBrick";//窗口类名
 HWND  hwnd;
 MSG   msg;                //消息结构
 WNDCLASSEX wndclass;      //窗口类
 int   iScreenWide;        //定义一个整型变量来取得窗口的宽度

 wndclass.cbSize   = sizeof(wndclass);
 wndclass.style   = CS_HREDRAW|CS_VREDRAW;//窗口类型


 wndclass.lpfnWndProc = WndProc;   //窗口处理函数为 WndProc
 wndclass.cbClsExtra  = 0;         //窗口类无扩展
 wndclass.cbWndExtra  = 0;         //窗口实例无扩展
 wndclass.hInstance  = hInstance;                    //当前实例句柄
 wndclass.hIcon   = LoadIcon (NULL, IDI_APPLICATION);//默认图标
 wndclass.hCursor  = LoadCursor (NULL,IDC_ARROW);    //箭头光标
 wndclass.hbrBackground = (HBRUSH)GetStockObject (WHITE_BRUSH); //背景为黑色
 wndclass.lpszMenuName = NULL;         //窗口中无菜单
 wndclass.lpszClassName = AppName;     //类名为"ToyBrick"
 wndclass.hIconSm  = LoadIcon (NULL, IDI_INFORMATION);

//----------------------------------窗口类的注册-----------------------------------------
 if(!RegisterClassEx (&wndclass))//如果注册失败则发出警报声音，返回FALSE
 {
  MessageBeep(0);
  return FALSE;
 }

 // 获取显示器分辨率的X值iScreenWide，将程序窗口置于屏幕中央
 iScreenWide=GetSystemMetrics (SM_CXFULLSCREEN);

 hwnd =CreateWindow (
                  AppName,                    //窗口类名
                 "深度、广度优先搜索迷宫",//窗口实例的标题名
      WS_MINIMIZEBOX|WS_SYSMENU , //窗口的风格
      iScreenWide/2-W*CELL/2,     //窗口左上角横坐标(X)
      CELL,                       //窗口左上角纵坐标(Y)
      (W+0.3)*CELL,               //窗口的宽，而不是客户区的宽
      (H+1.2)*CELL,               //窗口的高 ，而不是客户区的高
      NULL,                       //窗口无父窗口
      NULL,                       //窗口无主菜单
      hInstance,                  //创建此窗口的应用程序的当前句柄
      NULL                        //不使用该值
       );
 if(!hwnd) return FALSE;
 MessageBox(NULL,TEXT("主程序:彭俊威"), TEXT("数据结构课程设计"),MB_ICONINFORMATION);
  //显示窗口
 ShowWindow (hwnd,iCmdShow);
 //绘制客户区
 UpdateWindow (hwnd);
 //消息循环
 while (GetMessage (&msg, NULL, 0, 0))
 {
  TranslateMessage (&msg);
  DispatchMessage (&msg);
 }
    //消息循环结束即程序终止时将消息返回系统
 return msg.wParam;
}

//-------------------窗口过程函数WndProc-----------------------------

LRESULT CALLBACK WndProc ( HWND  hwnd,UINT  iMsg,WPARAM wParam,LPARAM lParam )
{
 HDC   hdc;
 PAINTSTRUCT ps;
 //char Buffer[20];
 switch (iMsg)
 {
  //WM_PAINT(窗口第一次生成时执行,WM_PAINT将图从内存拷到屏幕上)
 case WM_PAINT:
  hdc =BeginPaint (hwnd, &ps);//获得设备环境句柄
  DrawGamePlace(hdc, W, H);//在客户区绘满单元格
  if (!ReadDocument(hdc))
  DrawPath(hdc, W, H);//拆墙
  MessageBox (NULL,TEXT("开始深度优先搜索"), TEXT("搜索方式"), NULL);
  DFS (hdc);//深度优先搜索寻找迷宫出口
  DrawWhiteGround (hdc);//将客户区还原为白色背景
  ReadDocument(hdc);//重新绘制迷宫
  MessageBox (NULL,TEXT("开始广度优先搜索"), TEXT("搜索方式"), NULL);
  BFS (hdc);//广度优先搜索寻找迷宫出口
  EndPaint (hwnd, &ps);
  return 0;
  //WM_DESTROY(响应关闭窗口动作)
 case WM_DESTROY:
  PostQuitMessage (0);
  return 0;
 }

 return DefWindowProc (hwnd, iMsg, wParam, lParam);

}

//////////////////////////////////////////////////////////

//将整个客户区绘制为白色
void DrawWhiteGround (HDC hdc)
{
int col, row;
std::ifstream f ("d:\\迷宫拆墙数据.txt");
f>>col>>row;
f.close();
HBRUSH hbrush = CreateSolidBrush(RGB(255,255,255));
SelectObject(hdc, hbrush);
Rectangle(hdc, 0, 0, col*CELL, row*CELL);
DeleteObject(hbrush);
}

//绘制迷宫起始点与终止点
void DrawRedBlock (HDC hdc, int l, int t, int r, int b)
{
HBRUSH hbrush = CreateSolidBrush(RGB(255,0,0));
SelectObject (hdc, hbrush);
Rectangle(hdc, l, t, r, b);
DeleteObject(hbrush);
}

//拆墙(用白色划线替换红色划线)
void Replace (HDC hdc, int x, int y, int z, int k)
{
    HPEN hpen;
    hpen = CreatePen(PS_SOLID, 1, RGB(255,255,255));
    SelectObject(hdc, hpen);
    MoveToEx (hdc,x, y,NULL);
    LineTo (hdc, z, k);
    DeleteObject(hpen);

}

//画单元格，后面四个参数依次为左上坐标和右下坐标
void DrawRect (HDC hdc, int l, int t, int r, int b)
{
 MoveToEx (hdc, l, t, NULL);   //将起始点移动到(l,t)
 LineTo (hdc, r, t);
 LineTo (hdc, r, b);
 LineTo (hdc, l, b);
 LineTo (hdc, l,t);
}


//用绿色画刷画移动目标
void DrawCell (HDC hdc, int l, int t, int r, int b)
{
 HBRUSH hbrush;

 hbrush=CreateSolidBrush(RGB(0,255,0));    // 绿色画刷
 SelectObject(hdc,hbrush);
 Rectangle(hdc,l, t, r, b);
 DeleteObject (hbrush);


}

//在客户区绘满单元格
void DrawGamePlace(HDC hdc, int col, int row)
{
 int i,j;
 HPEN hpen1;
 hpen1=CreatePen(PS_SOLID,1,RGB(255,0,0));

   //绘制游戏区域方格线(红色)
 SelectObject(hdc,hpen1);
 for (i=0; i<row; i++)
  for(j=0; j<col; j++)
   DrawRect (hdc, j*CELL, i*CELL, (j+1)*CELL, (i+1)*CELL);

    DeleteObject(hpen1);

}

//迷宫拆墙
void DrawPath(HDC hdc, int col, int row)
{
    int x, y, temp, i(-1);
    bool* visited;                // 访问标记
    POSITION* position;//储存每个单元格的坐标
    POSITION w;
    std::stack<POSITION>Stack;
    MazeEdge *mazeedge;
    Wall* wall;//储存每个单元格的墙的情况

    wall = new Wall[col*row];//申请col*row个单元格
    for (x=0; x<row; x++)//请所有单元格的四面墙初始化为都有状态
        for (y=0; y<col; y++)
        {
            wall[x*col+y].wall_l = 1;
            wall[x*col+y].wall_t = 1;
            wall[x*col+y].wall_r = 1;
            wall[x*col+y].wall_b = 1;
        }

    visited = new bool[col*row];//访问标记
    for (x=0; x<row; x++)
        for (y=0; y<col; y++)
            visited[x*col+y] = false;//初始为未访问状态
        position = new POSITION[col*row];

    for (x=0; x<row; x++)//给每个点定位
        for (y=0; y<col; y++)
        {
            position[x*col+y].x = y*CELL;
            position[x*col+y].y = x*CELL;
            position[x*col+y].index_x = y;
            position[x*col+y].index_y = x;
        }


   mazeedge = new MazeEdge[col*row-1];//一棵树有顶点数-1条边
   MessageBox(NULL, TEXT("现在开始拆墙"), TEXT("消息"), NULL);
   srand (time(NULL));//系统时间作随机种子
   x = rand()%col;//随机产生起始点
   y = rand()%row;
   Stack.push(position[y*col+x]);//迷宫入口进栈
   visited[y*col+x] = true;//标记已经访问过
   while (!Stack.empty())
   {
   w = Stack.top();
   while (Adj(w.index_x, w.index_y, visited, col))//如果该单元格有没有被访问过的单元格
   {
       temp = rand()%4;
   if (temp==0&&(w.index_x+1<col)&&!visited[w.index_y*col+w.index_x+1])//右移
   {

       Sleep(50);
       i++;
       mazeedge[i].x = w.x+CELL;/*记录迷宫的拆墙数据*/
       mazeedge[i].y = w.y;
       mazeedge[i].z = w.x+CELL;
       mazeedge[i].w = w.y+CELL;
       /////////////////////////                 /*记录每个单元格四面墙的数据
       wall[w.index_y*col+w.index_x].wall_r = 0;//单元格(w.index_x,w.index_y)的右墙被拆除
       wall[w.index_y*col+w.index_x+1].wall_l = 0;//单元格(w.index_x+1,w.index_y)的左墙被拆除
       ////////////////////////
       Replace (hdc, w.x+CELL, w.y, w.x+CELL, w.y+CELL);//拆右竖墙
       visited[w.index_y*col+w.index_x+1] = true;//标记已经访问 过的单元格
       Stack.push(position[w.index_y*col+w.index_x+1]);//符合条件的相邻单元格进栈
       w = Stack.top();
   }

   if (temp==1&&(w.index_x-1>-1)&&!visited[w.index_y*col+w.index_x-1])//左移
   {

       Sleep(50);
       i++;
       mazeedge[i].x = w.x;/*记录迷宫的拆墙数据*/
       mazeedge[i].y = w.y;
       mazeedge[i].z = w.x;
       mazeedge[i].w = w.y+CELL;
        /////////////////////////                 /*记录每个单元格四面墙的数据
       wall[w.index_y*col+w.index_x].wall_l = 0;//单元格(w.index_x,w.index_y)的左墙被拆除
       wall[w.index_y*col+w.index_x-1].wall_r = 0;//单元格(w.index_x-1,w.index_y)的右墙被拆除
       ////////////////////////
       Replace (hdc, w.x, w.y, w.x, w.y+CELL);//拆左竖墙，左拆与右拆不一样
       visited[w.index_y*col+w.index_x-1] = true;//标记已经访问过的单元格
       Stack.push(position[w.index_y*col+w.index_x-1]);//符合条件的相邻单元格进栈
       w = Stack.top();

   }

   if (temp==2&&(w.index_y-1>-1)&&!visited[(w.index_y-1)*col+w.index_x])//上移
   {
       Sleep(50);
       i++;
       mazeedge[i].x = w.x;/*记录迷宫的拆墙数据*/
       mazeedge[i].y = w.y;
       mazeedge[i].z = w.x+CELL;
       mazeedge[i].w = w.y;
        /////////////////////////                 /*记录每个单元格四面墙的数据
       wall[w.index_y*col+w.index_x].wall_t = 0;//单元格(w.index_x,w.index_y)的上墙被拆除
       wall[(w.index_y-1)*col+w.index_x].wall_b = 0;//单元格(w.index_x,w.index_y-1)的下墙被拆除
       ////////////////////////
       Replace (hdc, w.x, w.y, w.x+CELL, w.y);//拆横墙
       visited[(w.index_y-1)*col+w.index_x] = true;//标记已经访问过的单元格
       Stack.push(position[(w.index_y-1)*col+w.index_x]);//符合条件的相邻单元格进栈
       w = Stack.top();
   }

   if (temp==3&&(w.index_y+1<row)&&!visited[(w.index_y+1)*col+w.index_x])//下移
   {
       Sleep(50);
       i++;
       mazeedge[i].x = w.x;/*记录迷宫的拆墙数据*/
       mazeedge[i].y = w.y+CELL;
       mazeedge[i].z = w.x+CELL;
       mazeedge[i].w = w.y+CELL;
        /////////////////////////                 /*记录每个单元格四面墙的数据
       wall[w.index_y*col+w.index_x].wall_b = 0;//单元格(w.index_x,w.index_y)的下墙被拆除
       wall[(w.index_y+1)*col+w.index_x].wall_t = 0;//单元格(w.index_x,w.index_y+1)的上墙被拆除
       ////////////////////////
       Replace (hdc, w.x, w.y+CELL, w.x+CELL, w.y+CELL);//拆横墙
       visited[(w.index_y+1)*col+w.index_x] = true;//标记已经访问过的单元格
       Stack.push(position[(w.index_y+1)*col+w.index_x]);//符合条件的相邻单元格进栈
       w = Stack.top();
   }
   }
   Stack.pop();//回溯

}
   WriteDocument(mazeedge, wall, i);//将迷宫拆墙数据写入txt文件
}

//深度优先搜索寻找迷宫路径
void DFS (HDC hdc)
{
    int col, row, entrance, exit, i, j;
    bool* visited = NULL;//访问标示
    bool status(false);//走迷宫状态
    POSITION* position = NULL;//记录各个单元的坐标
    POSITION w;//临时中间变量
    Wall* wall = NULL;//储存单元格四面墙的信息
    std::stack<POSITION> Stack;

    std::ifstream f("d:\\迷宫拆墙数据.txt");      /*读迷宫规模数据*/
    f>>col>>row;//从txt文件中获取原来迷宫的规模
    f.close();

    wall = new Wall[col*row];
    std::ifstream f1("d:\\每个单元格四面墙的数据.txt"); /*读迷宫墙的信息*/
    for (i=0; i<col*row; i++)//从txt文档中读入每个单元格四面墙数据
        f1>>wall[i].wall_l>>wall[i].wall_t>>wall[i].wall_r>>wall[i].wall_b;
    f1.close();

    srand(time(NULL));//系统时间作随机种子
    entrance = rand()%col;//随机在迷宫第一行和最后一行分别产生入口与出口
    exit = rand()%col;
    visited = new bool[col*row];//访问标记
    for (i=0; i<row; i++)
    for (j=0; j<col; j++)
    visited[i*col+j] = false;//初始为未访问状态
    position = new POSITION[col*row];

    for (i=0; i<row; i++)//给每个点定位
    for (j=0; j<col; j++)
    {
    position[i*col+j].x = j*CELL;
    position[i*col+j].y = i*CELL;
    position[i*col+j].index_x = j;
    position[i*col+j].index_y = i;
    }
    Stack.push(position[entrance]);//迷宫入口进栈
    visited[entrance] = true;
    DrawRedBlock (hdc, entrance*CELL+6, 6, (entrance+1)*CELL-6, CELL-6);//绘制迷宫入口
    DrawRedBlock (hdc, exit*CELL+6, (row-1)*CELL+6, (exit+1)*CELL-6, row*CELL-6);//绘制迷宫出口

    while (!Stack.empty()&&!status)
    {
     w = Stack.top();
     while (Adj_NoWall (w.index_x, w.index_y, visited, wall, col))//如果有还没有被访问的相邻单元格并且可以访问
     {

       if (wall[w.index_y*col+w.index_x].wall_b == 0&&!visited[(w.index_y+1)*col+w.index_x])//如果下墙已经被拆除而且下边单元格没有被访问过,目标下移
      {
          Sleep(200);
      DrawCell (hdc, w.x+6, w.y+CELL+6, w.x+CELL-6, w.y+2*CELL-6);//使移动目标小于单元格大小
      visited[(w.index_y+1)*col+w.index_x] = true;
      Stack.push(position[(w.index_y+1)*col+w.index_x]);//入栈
      w = Stack.top();
      }

      else if (wall[w.index_y*col+w.index_x].wall_r == 0&&!visited[(w.index_y)*col+w.index_x+1])//如果右墙已经被拆除而且右边单元格没有被访问过,目标右移
      {
          Sleep(200);
      DrawCell (hdc, w.x+CELL+6, w.y+6, w.x+2*CELL-6, w.y+CELL-6);//使移动目标小于单元格大小
      visited[w.index_y*col+w.index_x+1] = true;
      Stack.push(position[w.index_y*col+w.index_x+1]);//入栈
      w = Stack.top();
      }

      else if (wall[w.index_y*col+w.index_x].wall_l == 0&&!visited[w.index_y*col+w.index_x-1])//如果左墙已经被拆除而且左边单元格没有被访问过,目标左移
      {
          Sleep(200);
      DrawCell (hdc, w.x-CELL+6, w.y+6, w.x-6, w.y+CELL-6);//使移动目标小于单元格大小
      visited[w.index_y*col+w.index_x-1] = true;
      Stack.push(position[w.index_y*col+w.index_x-1]);//入栈
      w = Stack.top();
      }
     else if (wall[w.index_y*col+w.index_x].wall_t == 0&&!visited[(w.index_y-1)*col+w.index_x])//如果上墙已经被拆除而且上边单元格没有被访问过,目标上移
      {
          Sleep(200);
      DrawCell (hdc, w.x+6, w.y-CELL+6, w.x+CELL-6, w.y-6);//使移动目标小于单元格大小
      visited[(w.index_y-1)*col+w.index_x] = true;
      Stack.push(position[(w.index_y-1)*col+w.index_x]);//入栈
      w = Stack.top();
      }

      if (w.index_y==row-1&&w.index_x==exit)//如果到达迷宫出口则停止搜索
      {
          DrawRedBlock (hdc, exit*CELL+6, (row-1)*CELL+6, (exit+1)*CELL-6, row*CELL-6);//绘制迷宫出口
          MessageBox(NULL,TEXT("成功走出迷宫!"), TEXT("Congratunations"),MB_ICONINFORMATION);
          status = true;
          break;
      }
     }

Stack.pop();//回溯
}

}

//广度优先搜索寻找迷宫路径
void BFS (HDC hdc)
{

    int col, row, entrance, exit, i, j;
    bool* visited = NULL;//访问标示
    bool status(false);//走迷宫状态
    POSITION* position = NULL;//记录各个单元的坐标
    POSITION u;//临时中间变量
    Wall* wall = NULL;//储存单元格四面墙的信息
    std::queue<POSITION> Queue;
    char Buffer[20];

    std::ifstream f("d:\\迷宫拆墙数据.txt");      /*读迷宫规模数据*/
    f>>col>>row;//从txt文件中获取原来迷宫的规模
    f.close();

    wall = new Wall[col*row];
    std::ifstream f1("d:\\每个单元格四面墙的数据.txt"); /*读迷宫墙的信息*/
    for (i=0; i<col*row; i++)//从txt文档中读入每个单元格四面墙数据
        f1>>wall[i].wall_l>>wall[i].wall_t>>wall[i].wall_r>>wall[i].wall_b;
    f1.close();

    srand(time(NULL));//系统时间作随机种子
    entrance = rand()%col;//随机在迷宫第一行和最后一行分别产生入口与出口
    exit = rand()%col;
    visited = new bool[col*row];//访问标记
    for (i=0; i<row; i++)
    for (j=0; j<col; j++)
    visited[i*col+j] = false;//初始为未访问状态
    position = new POSITION[col*row];

    for (i=0; i<row; i++)//给每个点定位
    for (j=0; j<col; j++)
    {
    position[i*col+j].x = j*CELL;
    position[i*col+j].y = i*CELL;
    position[i*col+j].index_x = j;
    position[i*col+j].index_y = i;
    }
    Queue.push(position[entrance]);//迷宫入口进队列
    visited[entrance] = true;
    DrawRedBlock (hdc, entrance*CELL+6, 6, (entrance+1)*CELL-6, CELL-6);//绘制迷宫入口
    DrawRedBlock (hdc, exit*CELL+6, (row-1)*CELL+6, (exit+1)*CELL-6, row*CELL-6);//绘制迷宫出口
    while (!Queue.empty())
    {
     u = Queue.front();
     Queue.pop();
     if (Adj_NoWall (u.index_x, u.index_y, visited, wall, col))//如果有还没有被访问的相邻单元格并且可以访问
     {
      if ((u.index_y+1<row)&&!visited[(u.index_y+1)*col+u.index_x]&&wall[u.index_y*col+u.index_x].wall_b==0)//如果作相邻单元格没有被访问过，并且可以被访问
      {
          Sleep (100);
       DrawCell (hdc, u.x+6, u.y+CELL+6, u.x+CELL-6, u.y+2*CELL-6);//画下单元格
       visited[(u.index_y+1)*col+u.index_x] = true;
       Queue.push (position[(u.index_y+1)*col+u.index_x]);//下单元格进队列
      }

      if ((u.index_x-1>-1)&&!visited[u.index_y*col+u.index_x-1]&&wall[u.index_y*col+u.index_x].wall_l==0)//如果作相邻单元格没有被访问过，并且可以被访问
      {
           Sleep (100);
       DrawCell (hdc, u.x-CELL+6, u.y+6, u.x-6, u.y+CELL-6);//画左单元格
       visited[u.index_y*col+u.index_x-1] = true;
       Queue.push (position[u.index_y*col+u.index_x-1]);//左单元格进队列
      }

      if ((u.index_x+1<col)&&!visited[u.index_y*col+u.index_x+1]&&wall[u.index_y*col+u.index_x].wall_r==0)//如果作相邻单元格没有被访问过，并且可以被访问
      {
           Sleep (100);
      DrawCell (hdc, u.x+CELL+6, u.y+6, u.x+2*CELL-6, u.y+CELL-6);//画右单元格
      visited[u.index_y*col+u.index_x+1] = true;
      Queue.push (position[u.index_y*col+u.index_x+1]);//右单元格进队列
      }

      if ((u.index_y-1>-1)&&!visited[(u.index_y-1)*col+u.index_x]&&wall[u.index_y*col+u.index_x].wall_t==0)
      {
           Sleep (100);
      DrawCell (hdc, u.x+6, u.y+CELL+6, u.x+CELL-6, u.y+2*CELL-6);//画上单元格
      visited[(u.index_y-1)*col+u.index_x] = true;
      Queue.push (position[(u.index_y-1)*col+u.index_x]);//上单元格进队列
      }
       if (u.index_y==row-1&&u.index_x==exit)//如果到达迷宫出口则停止搜索
      {
          DrawRedBlock (hdc, exit*CELL+6, (row-1)*CELL+6, (exit+1)*CELL-6, row*CELL-6);//绘制迷宫出口
          MessageBox(NULL,TEXT("成功走出迷宫!"), TEXT("Congratunations"),MB_ICONINFORMATION);
          break;
      }
     }
    }

}

//判断该单元格是否有没有被访问的相邻单元格
bool Adj(int x, int y, bool* visited, int col)
{
 if((x-1>-1)&&!visited[y*col+x-1]||(x+1<W)&&!visited[y*col+x+1]||     y-1>-1&&!visited[(y-1)*col+x]||y+1<H&&!visited[(y+1)*col+x])
       return true;
   return false;
}

//判断该单元格是否有没有被访问的相邻单元格并且周围没有墙可以访问
bool Adj_NoWall(int x, int y, bool* visited, Wall* wall, int col)
{
 if((x-1>-1)&&!visited[y*col+x-1]&&wall[y*col+x].wall_l==0||(x+1<W)&&!visited[y*col+x+1]&&wall[y*col+x].wall_r==0||     y-1>-1&&!visited[(y-1)*col+x]&&wall[y*col+x].wall_t==0||y+1<H&&!visited[(y+1)*col+x]&&wall[y*col+x].wall_b==0)
       return true;
   return false;
}

//将迷宫拆墙数据写入txt文件中
void WriteDocument (MazeEdge* mazeedge, Wall* wall, int i)
{
int j;
std::ofstream f("d:\\迷宫拆墙数据.txt");
f<<W<<" "<<H<<std::endl;//写入拆墙数据
for (j=0; j<i+1; j++)
f<<mazeedge[j].x<<" "<<mazeedge[j].y<<" "<<mazeedge[j].z<<" "<<mazeedge[j].w<<std::endl;
f.close();
std::ofstream f1("d:\\每个单元格四面墙的数据.txt");//写入每个单元格四面墙的数据
for (j=0; j<i+2; j++)
f1<<wall[j].wall_l<<" "<<wall[j].wall_t<<" "<<wall[j].wall_r<<" "<<wall[j].wall_b<<std::endl;
f1.close();
}

//从txt文件中读取迷宫拆墙数据
bool ReadDocument (HDC hdc)
{
int col, row, i;
MazeEdge *mazeedge;
std::ifstream f ("d:\\迷宫拆墙数据.txt");
if (f.fail())//打开文件失败
return false;
else
{
f>>col>>row;
f.close();
}

DrawGamePlace(hdc, col, row);//在客户区绘满红色单元格

mazeedge = new MazeEdge[col*row-1];
f.open("d:\\迷宫拆墙数据.txt");
f>>col>>row;
for (i=0; i<col*row-1; i++)//从txt文档中读入数据
f>>mazeedge[i].x>>mazeedge[i].y>>mazeedge[i].z>>mazeedge[i].w;
f.close();
for (i=0; i<col*row-1; i++)//拆墙
Replace(hdc, mazeedge[i].x, mazeedge[i].y, mazeedge[i].z, mazeedge[i].w);

return true;
}