用easyx写一个贪吃蛇游戏

好的，下面是用EasyX库写的贪吃蛇游戏代码：

#include <graphics.h>
#include <conio.h>
#include <time.h>

const int WIDTH = 800;  // 窗口宽度
const int HEIGHT = 600;  // 窗口高度
const int CELL_SIZE = 20;  // 格子大小
const int ROWS = HEIGHT / CELL_SIZE;  // 行数
const int COLS = WIDTH / CELL_SIZE;  // 列数
const int MAX_LENGTH = ROWS * COLS;  // 蛇的最大长度

enum Direction { UP, DOWN, LEFT, RIGHT };  // 方向枚举

struct Point {
    int x, y;
    Point(int x = 0, int y = 0) : x(x), y(y) {}
};

class Snake {
public:
    Snake(Point head = Point(COLS / 2, ROWS / 2));
    void move(Direction dir);
    bool isDead() const;
    bool isEatFood(const Point& foodPos) const;
    void grow();
    void draw() const;
private:
    Point body[MAX_LENGTH];
    int length;
};

Snake::Snake(Point head) {
    body[0] = head;
    length = 1;
}

void Snake::move(Direction dir) {
    for (int i = length - 1; i > 0; --i) {
        body[i] = body[i - 1];
    }
    switch (dir) {
    case UP:
        --body[0].y;
        break;
    case DOWN:
        ++body[0].y;
        break;
    case LEFT:
        --body[0].x;
        break;
    case RIGHT:
        ++body[0].x;
        break;
    }
}

bool Snake::isDead() const {
    if (body[0].x < 0 || body[0].x >= COLS || body[0].y < 0 || body[0].y >= ROWS) {
        return true;
    }
    for (int i = 1; i < length; ++i) {
        if (body[i].x == body[0].x && body[i].y == body[0].y) {
            return true;
        }
    }
    return false;
}

bool Snake::isEatFood(const Point& foodPos) const {
    return body[0].x == foodPos.x && body[0].y == foodPos.y;
}

void Snake::grow() {
    body[length++] = body[length - 1];
}

void Snake::draw() const {
    setfillcolor(GREEN);
    setlinecolor(WHITE);
    for (int i = 0; i < length; ++i) {
        fillrectangle(body[i].x * CELL_SIZE, body[i].y * CELL_SIZE,
            (body[i].x + 1) * CELL_SIZE, (body[i].y + 1) * CELL_SIZE);
        rectangle(body[i].x * CELL_SIZE, body[i].y * CELL_SIZE,
            (body[i].x + 1) * CELL_SIZE, (body[i].y + 1) * CELL_SIZE);
    }
}

int main() {
    initgraph(WIDTH, HEIGHT);
    setbkcolor(BLACK);
    settextcolor(WHITE);
    settextstyle(20, 0, _T("Consolas"));
    srand(static_cast<unsigned int>(time(nullptr)));
    Snake snake;
    Point foodPos(rand() % COLS, rand() % ROWS);
    Direction dir = RIGHT;
    while (!snake.isDead()) {
        if (kbhit()) {
            char ch = _getch();
            switch (ch) {
            case 'w':
            case 'W':
                if (dir != DOWN) {
                    dir = UP;
                }
                break;
            case 's':
            case 'S':
                if (dir != UP) {
                    dir = DOWN;
                }
                break;
            case 'a':
            case 'A':
                if (dir != RIGHT) {
                    dir = LEFT;
                }
                break;
            case 'd':
            case 'D':
                if (dir != LEFT) {
                    dir = RIGHT;
                }
                break;
            }
        }
        cleardevice();
        if (snake.isEatFood(foodPos)) {
            snake.grow();
            foodPos = Point(rand() % COLS, rand() % ROWS);
        }
        snake.move(dir);
        snake.draw();
        setfillcolor(RED);
        setlinecolor(WHITE);
        fillrectangle(foodPos.x * CELL_SIZE, foodPos.y * CELL_SIZE,
            (foodPos.x + 1) * CELL_SIZE, (foodPos.y + 1) * CELL_SIZE);
        rectangle(foodPos.x * CELL_SIZE, foodPos.y * CELL_SIZE,
            (foodPos.x + 1) * CELL_SIZE, (foodPos.y + 1) * CELL_SIZE);
        _stprintf_s(_T("Score: %d"), snake.length - 1);
        outtextxy(10, 10, _T("Score: 0"));
        Sleep(100);
    }
    _stprintf_s(_T("Game over! Your score is %d"), snake.length - 1);
    outtextxy(WIDTH / 2 - 120, HEIGHT / 2, _T("Game over! Your score is 0"));
    _getch();
    closegraph();
    return 0;
}

编译运行后，就可以开始玩贪吃蛇游戏了。使用 W、S、A、D 或方向键控制蛇的移动方向，吃到食物会增加蛇的长度，撞到墙壁或自己的身体就会游戏结束。