vc++6.0贪吃蛇代码

以下是一个简单的贪吃蛇游戏的VC++6.0代码示例：

#include <windows.h>
#include <time.h>

#define ROW 30
#define COL 30
#define WIDTH 20
#define HEIGHT 20

#define UP 1
#define DOWN 2
#define LEFT 3
#define RIGHT 4

struct Point
{
    int x;
    int y;
};

struct Snake
{
    Point body[ROW * COL];
    int length;
    int direction;
};

struct Food
{
    Point position;
    bool exist;
};

LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam);

void DrawGrid(HDC hdc);
void DrawSnake(HDC hdc, Snake snake);
void DrawFood(HDC hdc, Food food);
void MoveSnake(Snake& snake);
bool CheckCollision(Snake snake, int x, int y);
void GenerateFood(Food& food, Snake snake);

Snake snake;
Food food;
int score;

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
    srand((unsigned)time(NULL));

    snake.body[0].x = ROW / 2;
    snake.body[0].y = COL / 2;
    snake.length = 1;
    snake.direction = UP;

    food.exist = false;

    score = 0;

    WNDCLASSEX wc;
    HWND hwnd;
    MSG msg;

    wc.cbSize = sizeof(WNDCLASSEX);
    wc.style = 0;
    wc.lpfnWndProc = WndProc;
    wc.cbClsExtra = 0;
    wc.cbWndExtra = 0;
    wc.hInstance = hInstance;
    wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
    wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
    wc.lpszMenuName = NULL;
    wc.lpszClassName = "SnakeClass";
    wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION);

    if (!RegisterClassEx(&wc))
    {
        MessageBox(NULL, "Window Registration Failed!", "Error!", MB_ICONEXCLAMATION | MB_OK);
        return 0;
    }

    hwnd = CreateWindowEx(WS_EX_CLIENTEDGE, "SnakeClass", "Snake", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, WIDTH * ROW + 16, HEIGHT * COL + 39, NULL, NULL, hInstance, NULL);

    if (hwnd == NULL)
    {
        MessageBox(NULL, "Window Creation Failed!", "Error!", MB_ICONEXCLAMATION | MB_OK);
        return 0;
    }

    ShowWindow(hwnd, nCmdShow);
    UpdateWindow(hwnd);

    while (GetMessage(&msg, NULL, 0, 0) > 0)
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    return msg.wParam;
}

LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    HDC hdc;
    PAINTSTRUCT ps;

    switch (message)
    {
    case WM_CREATE:
        SetTimer(hwnd, 1, 100, NULL);
        break;
    case WM_TIMER:
        MoveSnake(snake);
        if (CheckCollision(snake, food.position.x, food.position.y))
        {
            snake.length++;
            score++;
            food.exist = false;
        }
        InvalidateRect(hwnd, NULL, TRUE);
        break;
    case WM_KEYDOWN:
        switch (wParam)
        {
        case VK_UP:
            if (snake.direction != DOWN)
            {
                snake.direction = UP;
            }
            break;
        case VK_DOWN:
            if (snake.direction != UP)
            {
                snake.direction = DOWN;
            }
            break;
        case VK_LEFT:
            if (snake.direction != RIGHT)
            {
                snake.direction = LEFT;
            }
            break;
        case VK_RIGHT:
            if (snake.direction != LEFT)
            {
                snake.direction = RIGHT;
            }
            break;
        }
        break;
    case WM_PAINT:
        hdc = BeginPaint(hwnd, &ps);
        DrawGrid(hdc);
        DrawSnake(hdc, snake);
        if (!food.exist)
        {
            GenerateFood(food, snake);
        }
        DrawFood(hdc, food);
        EndPaint(hwnd, &ps);
        break;
    case WM_DESTROY:
        KillTimer(hwnd, 1);
        PostQuitMessage(0);
        break;
    default:
        return DefWindowProc(hwnd, message, wParam, lParam);
    }

    return 0;
}

void DrawGrid(HDC hdc)
{
    for (int i = 0; i <= ROW; i++)
    {
        MoveToEx(hdc, i * WIDTH + 8, 0, NULL);
        LineTo(hdc, i * WIDTH + 8, HEIGHT * COL);
    }
    for (int i = 0; i <= COL; i++)
    {
        MoveToEx(hdc, 8, i * HEIGHT, NULL);
        LineTo(hdc, WIDTH * ROW + 8, i * HEIGHT);
    }
}

void DrawSnake(HDC hdc, Snake snake)
{
    for (int i = 0; i < snake.length; i++)
    {
        Rectangle(hdc, snake.body[i].x * WIDTH + 9, snake.body[i].y * HEIGHT, (snake.body[i].x + 1) * WIDTH + 8, (snake.body[i].y + 1) * HEIGHT);
    }
}

void DrawFood(HDC hdc, Food food)
{
    if (food.exist)
    {
        Ellipse(hdc, food.position.x * WIDTH + 9, food.position.y * HEIGHT, (food.position.x + 1) * WIDTH + 8, (food.position.y + 1) * HEIGHT);
    }
}

void MoveSnake(Snake& snake)
{
    for (int i = snake.length - 1; i > 0; i--)
    {
        snake.body[i].x = snake.body[i - 1].x;
        snake.body[i].y = snake.body[i - 1].y;
    }

    switch (snake.direction)
    {
    case UP:
        snake.body[0].y--;
        break;
    case DOWN:
        snake.body[0].y++;
        break;
    case LEFT:
        snake.body[0].x--;
        break;
    case RIGHT:
        snake.body[0].x++;
        break;
    }

    if (snake.body[0].x < 0 || snake.body[0].x >= ROW || snake.body[0].y < 0 || snake.body[0].y >= COL)
    {
        MessageBox(NULL, "Game Over!", "Game Over!", MB_ICONEXCLAMATION | MB_OK);
        PostQuitMessage(0);
    }

    for (int i = 1; i < snake.length; i++)
    {
        if (snake.body[0].x == snake.body[i].x && snake.body[0].y == snake.body[i].y)
        {
            MessageBox(NULL, "Game Over!", "Game Over!", MB_ICONEXCLAMATION | MB_OK);
            PostQuitMessage(0);
        }
    }
}

bool CheckCollision(Snake snake, int x, int y)
{
    if (snake.body[0].x == x && snake.body[0].y == y)
    {
        return true;
    }
    else
    {
        return false;
    }
}

void GenerateFood(Food& food, Snake snake)
{
    do
    {
        food.position.x = rand() % ROW;
        food.position.y = rand() % COL;
    } while (CheckCollision(snake, food.position.x, food.position.y));

    food.exist = true;
}

这个示例使用 Win32 API 和 GDI 绘制贪吃蛇游戏，并且包含了基本的移动、碰撞检测和食物生成等功能。还有许多可以改进和完善的地方，但是作为一个简单的示例代码已经足够了。