用c语言写一个贪吃蛇游戏

这里提供一个简单的贪吃蛇游戏的C语言代码，你可以根据自己的需求进行修改和完善。

#include <stdio.h>
#include <stdlib.h>
#include <conio.h>
#include <windows.h>
#include <time.h>

#define WIDTH  40   // 游戏区域宽度
#define HEIGHT 20   // 游戏区域高度

// 定义方向
enum DIRECTION {
    UP, DOWN, LEFT, RIGHT
};

struct Position {
    int x;
    int y;
};

struct Snake {
    int length;        // 蛇的长度
    struct Position *body;   // 蛇的身体坐标
    enum DIRECTION direction;  // 蛇的前进方向
};

struct Food {
    int x;
    int y;
};

// 初始化蛇的位置和方向
void initSnake(struct Snake *snake) {
    snake->length = 3;
    snake->direction = RIGHT;
    snake->body = (struct Position *)malloc(snake->length * sizeof(struct Position));
    snake->body[0].x = 3;
    snake->body[0].y = 1;
    snake->body[1].x = 2;
    snake->body[1].y = 1;
    snake->body[2].x = 1;
    snake->body[2].y = 1;
}

// 初始化食物的位置
void initFood(struct Food *food) {
    srand((unsigned)time(NULL));
    food->x = rand() % (WIDTH - 2) + 1;
    food->y = rand() % (HEIGHT - 2) + 1;
}

// 绘制游戏界面
void drawGame(struct Snake *snake, struct Food *food) {
    system("cls");
    for (int i = 0; i < HEIGHT; i++) {
        for (int j = 0; j < WIDTH; j++) {
            if (i == 0 || i == HEIGHT - 1 || j == 0 || j == WIDTH - 1) {
                printf("#");
            } else if (i == food->y && j == food->x) {
                printf("$");
            } else {
                int flag = 0;
                for (int k = 0; k < snake->length; k++) {
                    if (snake->body[k].x == j && snake->body[k].y == i) {
                        printf("*");
                        flag = 1;
                        break;
                    }
                }
                if (!flag) {
                    printf(" ");
                }
            }
        }
        printf("\n");
    }
    printf("Length: %d\n", snake->length);
}

// 控制蛇的方向
void control(struct Snake *snake) {
    char ch = getch();
    if (ch == 'w' || ch == 'W') {
        if (snake->direction != DOWN) {
            snake->direction = UP;
        }
    } else if (ch == 's' || ch == 'S') {
        if (snake->direction != UP) {
            snake->direction = DOWN;
        }
    } else if (ch == 'a' || ch == 'A') {
        if (snake->direction != RIGHT) {
            snake->direction = LEFT;
        }
    } else if (ch == 'd' || ch == 'D') {
        if (snake->direction != LEFT) {
            snake->direction = RIGHT;
        }
    }
}

// 移动蛇
void move(struct Snake *snake, struct Food *food) {
    // 蛇头移动
    int x = snake->body[0].x;
    int y = snake->body[0].y;
    switch (snake->direction) {
        case UP:
            y--;
            break;
        case DOWN:
            y++;
            break;
        case LEFT:
            x--;
            break;
        case RIGHT:
            x++;
            break;
    }
    // 判断是否吃到食物
    if (x == food->x && y == food->y) {
        snake->length++;  // 蛇长度加1
        snake->body = (struct Position *)realloc(snake->body, snake->length * sizeof(struct Position));
        for (int i = snake->length - 1; i > 0; i--) {
            snake->body[i] = snake->body[i - 1];
        }
        snake->body[0].x = x;
        snake->body[0].y = y;
        initFood(food);  // 重新生成食物
    } else {
        // 蛇尾移动
        for (int i = snake->length - 1; i > 0; i--) {
            snake->body[i] = snake->body[i - 1];
        }
        snake->body[0].x = x;
        snake->body[0].y = y;
    }
}

// 判断游戏是否结束
int isGameOver(struct Snake *snake) {
    // 判断是否撞墙
    if (snake->body[0].x == 0 || snake->body[0].x == WIDTH - 1 || snake->body[0].y == 0 || snake->body[0].y == HEIGHT - 1) {
        return 1;
    }
    // 判断是否咬到自己
    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) {
            return 1;
        }
    }
    return 0;
}

int main() {
    struct Snake snake;
    struct Food food;
    initSnake(&snake);
    initFood(&food);
    while (1) {
        drawGame(&snake, &food);
        control(&snake);
        move(&snake, &food);
        if (isGameOver(&snake)) {
            printf("Game Over!\n");
            break;
        }
        Sleep(200);  // 控制游戏速度
    }
    free(snake.body);
    return 0;
}