用easyx写一个贪吃蛇游戏

好的，以下是用EasyX写的贪吃蛇游戏代码，希望能对您有帮助：

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

// 贪吃蛇的节点
struct Node {
    int x;
    int y;
    Node *next;
};

const int width = 40; // 游戏区宽度
const int height = 30; // 游戏区高度
const int nodeSize = 20; // 节点大小
const int delay = 100; // 每个节点移动的延迟时间（毫秒）
const int levelUpScore = 10; // 等级提升的分数
const int initLength = 3; // 初始贪吃蛇长度
const int initSpeed = 5; // 初始速度等级
const int speedUpInterval = 5; // 每隔多少分数提升一级速度
const int maxSpeedLevel = 10; // 最大速度等级

int score = 0; // 得分
int speedLevel = initSpeed; // 速度等级
bool gameOver = false; // 游戏是否结束
Node *head = NULL; // 贪吃蛇头指针
Node *tail = NULL; // 贪吃蛇尾指针
Node *food = NULL; // 食物指针

// 生成随机食物
void generateFood() {
    int x = rand() % width;
    int y = rand() % height;
    food = new Node({ x, y, NULL });
}

// 初始化游戏
void initGame() {
    srand((unsigned int)time(NULL));
    head = new Node({ width / 2, height / 2, NULL });
    tail = head;
    for (int i = 1; i < initLength; i++) {
        Node *node = new Node({ head->x - i, head->y, NULL });
        tail->next = node;
        tail = node;
    }
    generateFood();
}

// 绘制游戏区
void drawGameArea() {
    setfillcolor(RGB(255, 255, 255));
    bar(0, 0, width * nodeSize, height * nodeSize);
}

// 绘制节点
void drawNode(Node *node, COLORREF color) {
    setfillcolor(color);
    setlinecolor(color);
    int x = node->x * nodeSize;
    int y = node->y * nodeSize;
    fillrectangle(x, y, x + nodeSize, y + nodeSize);
}

// 绘制贪吃蛇
void drawSnake() {
    Node *node = head;
    while (node != NULL) {
        drawNode(node, RGB(0, 0, 255));
        node = node->next;
    }
}

// 绘制食物
void drawFood() {
    drawNode(food, RGB(255, 0, 0));
}

// 移动贪吃蛇
void moveSnake() {
    // 添加新的头节点
    Node *node = new Node({ head->x, head->y, head });
    head = node;
    // 删除尾节点
    if (tail->next == NULL) {
        Node *nodeToDelete = tail;
        tail = tail->next;
        delete nodeToDelete;
    }
    // 判断是否吃到食物
    if (head->x == food->x && head->y == food->y) {
        score++;
        if (score % speedUpInterval == 0 && speedLevel < maxSpeedLevel) {
            speedLevel++;
        }
        generateFood();
    }
    else {
        // 删除头节点
        Node *nodeToDelete = tail;
        tail = tail->next;
        delete nodeToDelete;
    }
    // 判断是否撞墙或撞到自己
    node = head->next;
    while (node != NULL) {
        if (node->x == head->x && node->y == head->y) {
            gameOver = true;
        }
        node = node->next;
    }
    if (head->x < 0 || head->x >= width || head->y < 0 || head->y >= height) {
        gameOver = true;
    }
}

// 更新游戏状态
void updateGame() {
    moveSnake();
}

// 游戏结束
void endGame() {
    setbkmode(TRANSPARENT);
    settextcolor(RGB(255, 0, 0));
    settextstyle(30, 0, _T("微软雅黑"));
    outtextxy(width * nodeSize / 2 - 80, height * nodeSize / 2 - 15, _T("游戏结束"));
}

int main() {
    initgraph(width * nodeSize, height * nodeSize);
    initGame();
    while (true) {
        drawGameArea();
        drawSnake();
        drawFood();
        updateGame();
        if (gameOver) {
            endGame();
            break;
        }
        Sleep(delay / speedLevel);
        if (_kbhit()) {
            char key = _getch();
            switch (key) {
            case 'w':
                if (head->next == NULL || head->y != head->next->y) {
                    head->y--;
                }
                break;
            case 's':
                if (head->next == NULL || head->y != head->next->y) {
                    head->y++;
                }
                break;
            case 'a':
                if (head->next == NULL || head->x != head->next->x) {
                    head->x--;
                }
                break;
            case 'd':
                if (head->next == NULL || head->x != head->next->x) {
                    head->x++;
                }
                break;
            }
        }
    }
    _getch();
    closegraph();
    return 0;
}

这是一个基本的贪吃蛇游戏，您可以根据需要进行修改和扩展。