使用easyx库实现贪吃蛇

好的，下面是基于EasyX库的贪吃蛇实现示例代码：

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

#define WIDTH 800
#define HEIGHT 600
#define SIZE 20

int posX, posY, foodX, foodY;
int dirX, dirY;
int length;
int score;

struct SnakeNode {
    int x;
    int y;
};

SnakeNode snake[100];

void InitGame() {
    posX = WIDTH / 2;
    posY = HEIGHT / 2;
    dirX = 1;
    dirY = 0;
    length = 3;
    score = 0;

    for (int i = 0; i < length; i++) {
        snake[i].x = posX - i * SIZE;
        snake[i].y = posY;
    }

    srand((unsigned)time(NULL));
    foodX = rand() % (WIDTH / SIZE) * SIZE;
    foodY = rand() % (HEIGHT / SIZE) * SIZE;
}

void DrawSnake() {
    setfillcolor(RGB(0, 255, 0));
    for (int i = 0; i < length; i++) {
        fillrectangle(snake[i].x, snake[i].y, snake[i].x + SIZE, snake[i].y + SIZE);
    }
}

void DrawFood() {
    setfillcolor(RGB(255, 0, 0));
    fillrectangle(foodX, foodY, foodX + SIZE, foodY + SIZE);
}

void UpdateSnake() {
    for (int i = length - 1; i > 0; i--) {
        snake[i].x = snake[i - 1].x;
        snake[i].y = snake[i - 1].y;
    }
    snake[0].x += dirX * SIZE;
    snake[0].y += dirY * SIZE;
}

bool CheckCollision() {
    if (snake[0].x < 0 || snake[0].x >= WIDTH || snake[0].y < 0 || snake[0].y >= HEIGHT) {
        return true;
    }
    for (int i = 1; i < length; i++) {
        if (snake[0].x == snake[i].x && snake[0].y == snake[i].y) {
            return true;
        }
    }
    return false;
}

bool CheckEat() {
    if (snake[0].x == foodX && snake[0].y == foodY) {
        length++;
        score++;
        foodX = rand() % (WIDTH / SIZE) * SIZE;
        foodY = rand() % (HEIGHT / SIZE) * SIZE;
        return true;
    }
    return false;
}

void ShowScore() {
    setbkmode(TRANSPARENT);
    settextcolor(RGB(255, 255, 255));
    char scoreStr[20];
    sprintf_s(scoreStr, "Score: %d", score);
    outtextxy(10, 10, scoreStr);
}

int main() {
    initgraph(WIDTH, HEIGHT);
    setbkcolor(RGB(0, 0, 0));

    InitGame();

    while (true) {
        cleardevice();

        DrawSnake();
        DrawFood();
        ShowScore();

        UpdateSnake();

        if (CheckCollision()) {
            MessageBox(NULL, "Game Over!", "Warning", MB_OK);
            break;
        }

        if (CheckEat()) {
            continue;
        }

        if (_kbhit()) {
            int key = _getch();
            switch (key) {
            case 'w':
                if (dirY != 1) {
                    dirX = 0;
                    dirY = -1;
                }
                break;
            case 's':
                if (dirY != -1) {
                    dirX = 0;
                    dirY = 1;
                }
                break;
            case 'a':
                if (dirX != 1) {
                    dirX = -1;
                    dirY = 0;
                }
                break;
            case 'd':
                if (dirX != -1) {
                    dirX = 1;
                    dirY = 0;
                }
                break;
            }
        }

        Sleep(100);
    }

    closegraph();
    return 0;
}

运行结果：