Win32实现迷宫

跟着杨立祥老师的课程，为了完成扫雷的作业，打算先用DFS/BFS实现路径搜索的简单Demo。

生成迷宫：

/*
扫雷程序生成方砖
*/
#include <stdio.h>
#include <time.h>
#include <stdlib.h>
#include <windows.h>
#include <windowsx.h>
#include "resource.h"

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPreInstance,
	PSTR szCmdLine, int iCmdshow)
{
	static TCHAR szAppName[] = TEXT("Maze");
	HWND		 hwnd;
	MSG			 msg;
	WNDCLASS	 wndclass;

	wndclass.style = CS_HREDRAW | CS_VREDRAW;
	wndclass.lpfnWndProc = WndProc;
	wndclass.cbClsExtra = 0;
	wndclass.cbWndExtra = 0;
	wndclass.hInstance = hInstance;
	wndclass.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_ICON1));
	wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
	wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
	wndclass.lpszMenuName = NULL;
	wndclass.lpszClassName = szAppName;

	if (!RegisterClass(&wndclass))
	{
		MessageBox(NULL, TEXT("registered error"), szAppName, MB_ICONERROR);
	}
	hwnd = CreateWindow(szAppName,
		TEXT("Mazes"),
		WS_OVERLAPPEDWINDOW,
		CW_USEDEFAULT,
		CW_USEDEFAULT,
		CW_USEDEFAULT,
		CW_USEDEFAULT,
		NULL,
		NULL,
		hInstance,
		NULL);

	ShowWindow(hwnd, iCmdshow);
	UpdateWindow(hwnd);

	while (GetMessage(&msg, NULL, 0, 0))
	{
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}
	return msg.wParam;
}

LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	static HBITMAP	hBitmap;
	static int		cxClient, cyClient, cxSource, cySource, xClick, yClick;
	static int		leftPos, rightPos, topPos, bottomPos;
	BITMAP			bitmap;
	HDC				hdc, hdcMem;
	PAINTSTRUCT		ps;
	int				x, y;
	HINSTANCE		hInstance;

	switch (message)
	{
	case WM_CREATE:
		PlaySound(TEXT("start.wav"), NULL, SND_FILENAME | SND_ASYNC);
		srand((unsigned)time(NULL));
		hInstance = ((LPCREATESTRUCT)lParam)->hInstance;
		hBitmap = LoadBitmap(hInstance, MAKEINTRESOURCE(IDB_BITMAP1));
		GetObject(hBitmap, sizeof(BITMAP), &bitmap);
		cxSource = bitmap.bmWidth;
		cySource = bitmap.bmHeight / 3;
		
		return 0;

	case WM_SIZE:
		cxClient = GET_X_LPARAM(lParam);
		cyClient = GET_Y_LPARAM(lParam);
		return 0;

	case WM_PAINT:
		hdc = BeginPaint(hwnd, &ps);
		hdcMem = CreateCompatibleDC(hdc);
		SelectObject(hdcMem, hBitmap);

		//方砖的范围（左上角）
		topPos = cySource * 2;
		leftPos = cxSource * 2;

		for (y = topPos; y <= cyClient - cySource * 3; y += cySource)
		{
			for (x = leftPos; x <= cxClient - cxSource * 3; x += cxSource)
			{

				if (rand() % 4 == 1)
				{
					BitBlt(hdc, x, y, cxSource, cySource, hdcMem, 0, 0, SRCCOPY);
				}
				else
				{
					BitBlt(hdc, x, y, cxSource, cySource, hdcMem, 0, cySource, SRCCOPY);
				}
			}
		}
		rightPos = x - cxSource;
		bottomPos = y - cySource;
		//左上：右下为出口
		BitBlt(hdc, cxSource * 2, cySource * 2, cxSource, cySource, hdcMem, 0, cySource, SRCCOPY);
		BitBlt(hdc, rightPos, bottomPos, cxSource, cySource, hdcMem, 0, cySource, SRCCOPY);

		DeleteDC(hdcMem);
		EndPaint(hwnd, &ps);
		return 0;
	case WM_LBUTTONDOWN:
		xClick = GET_X_LPARAM(lParam);
		yClick = GET_Y_LPARAM(lParam);
		//无效区
		if (xClick < leftPos || xClick > rightPos + cxSource || yClick < topPos || yClick > bottomPos + cySource)
		{
			break;
		}

		for (y = topPos; y <= bottomPos; y += cySource)
		{
			if (yClick >= y && yClick <= y + cySource)
			{
				yClick = y;
				break;
			}
		}

		for (x = leftPos; x <= rightPos; x += cxSource)
		{
			if (xClick >= x && xClick <= x + cxSource)
			{
				xClick = x;
				break;
			}
		}
		hdc = GetDC(hwnd);
		hdcMem = CreateCompatibleDC(hdc);
		SelectObject(hdcMem, hBitmap);
		BitBlt(hdc, xClick, yClick, cxSource, cySource, hdcMem, 0, cySource * 2, SRCCOPY);
		DeleteDC(hdcMem);
		ReleaseDC(hwnd, hdc);
		return 0;
	case WM_DESTROY:
		DeleteObject(hBitmap);
		PostQuitMessage(0);
		return 0;
	}
	return DefWindowProc(hwnd, message, wParam, lParam);
}

效果图：