int ** generatemaze(int ** maze, int x, int y)
{ int direction;
maze[x][y] =0; // 標示此格已設定
// Form1->Memo2->Lines->Add("(x,y,dir)="+IntToStr(x)+","+IntToStr(y)+","+IntToStr(direction));
while (maze[x][y+2]==1 || maze[x+2][y]==1 || maze[x][y-2]==1 || maze[x-2][y]==1) // 如果不是外牆
{ direction = rand()%4+1; // 決定下一個位置
if (direction==1 && maze[x][y+2]==1) // 向右走
{ maze[x][y+1] =0; // 拆掉右牆
// Form1->Memo2->Lines->Add("(x,y,dir)="+IntToStr(x)+","+IntToStr(y+1)+","+IntToStr(direction));
maze = generatemaze(maze, x,y+2);
}
else if (direction==2 && maze[x-2][y]==1) // 向上走
{ maze[x-1][y] =0; // 拆掉上牆
maze = generatemaze(maze, x-2,y);
}
else if (direction==3 && maze[x][y-2]==1) // 向左走
{ maze[x][y-1] =0; // 拆掉右牆
maze = generatemaze(maze, x,y-2);
}
else if (direction==4 && maze[x+2][y]==1) // 向下走
{ maze[x+1][y] =0; // 拆掉上牆
maze = generatemaze(maze, x+2,y);
}
}
return maze;
}
//--------------------------------
void __fastcall TForm1::Button3Click(TObject *Sender)
{ int i, j;
if (maze) // delete the previous maze
{ for (int i=0; i<m; i++) delete(maze[i]);
delete(maze);
}
m = Edit1->Text.ToInt();
n = Edit2->Text.ToInt();
maze = new int * [m];
for (int i=0; i<m; i++)
{ maze[i] = new int [n];
}
int Start_i=1, Start_j=1, End_i=m-2, End_j=n-2;
int x, y;
// srand(time(NULL));
for (x=0; x<m; x++)
{ for (y=0; y<n; y++)
{ if (x==0 || y==0 || x==m-1 || y==n-1 ) maze[x][y] = 2; // 設定外牆
else maze[x][y] = 1; // 初始迷宮內部
}
}
maze = generatemaze(maze, End_i, End_j); // 產生迷宮
maze[Start_i][Start_j-1] =0; // 拆掉入口左牆
maze[End_i][End_j+1] =0; // 拆掉出口右牆
StringGrid1->RowCount = m;
StringGrid1->ColCount = n;
for (i=0; i<m; i++)
for (j=0; j<n; j++)
StringGrid1->Cells[j][i] = maze[i][j];
}
----------------- 以上用 BCB 完成，以下用 VS 2010 完成 (兩語言對陣列的 boundary checking 不盡相同) -------------------------------
private: System::Void button1_Click_1(System::Object^ sender, System::EventArgs^ e)
{ int i, j;
int Start_i = 1, Start_j = 1, End_i = m-1, End_j = p-1;
if (maze) // delete the previous maze
{ for (i = 0; i < m; i++)
delete [] maze[i];
delete [] maze;
}
m = int::Parse(textBox1 -> Text);
p = int::Parse(textBox2 -> Text);
mazeX = new int * [m+2]; // mazeX 專為產生迷宮而生，大小為 (m+2)*(p+2)； 外層乃刻意保留的擋板
for (i = 0; i <= m+1; i++)
mazeX[i] = new int [p+2];
for (i = 0; i <= m+1; i++)
{ for (int j = 0; j <= p+1; j++)
{ if ((i == 0) || (j == 0) || (i == m+1) || (j == p+1))
mazeX[i][j] = 4; // 設定外層刻意保留的擋板
else
mazeX[i][j] = 1; // 初始迷宮 (m*p) 內部
}
}
mazeX = generatemaze(mazeX, End_i, End_j); // 產生迷宮 出口[m-1,p-1]、入口:[2,2]
for (i = 1; i <= m; i++)
{ for (j = 1; j <= p; j++)
{ if ((i == 1) || (j == 1) || (i == m) || (j == p))
mazeX[i][j] = 2; // 設定外牆；之前保留的擋板稍後拆掉
}
}
mazeX[Start_i+1][Start_j] = 0; // 拆掉入口 mazeX[2,2] 的左牆 即 [2,1] (=[Start_i+1, Start_j])
mazeX[End_i][End_j+1] = 0; // 拆掉出口 mazeX[m-1, p-1] 右牆 即 [m-1,p](=[End_i, End_j+1])
maze = new int * [m];
for (i = 0; i < m; i++)
maze[i] = new int [p];
for (i = 0; i < m; i++)
for (j = 0; j < p; j++)
maze[i][j] = mazeX[i+1][j+1]; // 調整入口成為 maze[1,1]、出口 maze[m-2, p-2]
// ... 可將 maze 顯示於 dataGridView 或 richTextBox/listBox 中
for (i = 0; i <= m+1; i++)
delete [] mazeX[i];
delete [] mazeX;
}