用c语言写出贪吃蛇代码，包括数组,指针,文件,结构体

好的，以下是一个用C语言实现的贪吃蛇游戏的代码，其中包括了数组、指针、文件和结构体。

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

#define MAP_WIDTH 20
#define MAP_HEIGHT 20
#define EMPTY 0
#define SNAKE_HEAD 1
#define SNAKE_BODY 2
#define FOOD 3

typedef struct Snake {
    int x, y;
    struct Snake *next;
} Snake;

int map[MAP_WIDTH][MAP_HEIGHT];

Snake *createSnake(int x, int y);
void destroySnake(Snake *snake);
void generateFood();
void moveSnake(Snake *snake, int direction);
void updateMap(Snake *snake);
void render();
void gameOver(int score);
void saveScore(int score);
int loadScore();

int main() {
    // 初始化游戏地图
    for (int i = 0; i < MAP_WIDTH; i++) {
        for (int j = 0; j < MAP_HEIGHT; j++) {
            map[i][j] = EMPTY;
        }
    }
    // 创建蛇
    Snake *snake = createSnake(MAP_WIDTH/2, MAP_HEIGHT/2);
    // 生成食物
    generateFood();
    // 初始化分数
    int score = 0;
    // 游戏循环
    while (true) {
        // 获取键盘输入
        if (kbhit()) {
            int key = getch();
            if (key == 'w' || key == 'W' || key == 72) {
                moveSnake(snake, 0);
            } else if (key == 's' || key == 'S' || key == 80) {
                moveSnake(snake, 1);
            } else if (key == 'a' || key == 'A' || key == 75) {
                moveSnake(snake, 2);
            } else if (key == 'd' || key == 'D' || key == 77) {
                moveSnake(snake, 3);
            }
        }
        // 更新蛇的位置
        Snake *current = snake;
        while (current != NULL) {
            Snake *next = current->next;
            if (next != NULL) {
                current->x = next->x;
                current->y = next->y;
            }
            current = next;
        }
        // 检测碰撞
        if (map[snake->x][snake->y] == SNAKE_BODY || map[snake->x][snake->y] == SNAKE_HEAD || snake->x < 0 || snake->x >= MAP_WIDTH || snake->y < 0 || snake->y >= MAP_HEIGHT) {
            gameOver(score);
            break;
        } else if (map[snake->x][snake->y] == FOOD) {
            score++;
            generateFood();
            Snake *newTail = createSnake(snake->x, snake->y);
            Snake *current = snake;
            while (current != NULL) {
                if (current->next == NULL) {
                    current->next = newTail;
                    break;
                }
                current = current->next;
            }
        }
        // 更新地图
        updateMap(snake);
        // 渲染画面
        render();
        // 等待一段时间
        Sleep(100);
    }
    // 释放蛇的内存
    destroySnake(snake);
    return 0;
}

Snake *createSnake(int x, int y) {
    Snake *snake = (Snake *)malloc(sizeof(Snake));
    snake->x = x;
    snake->y = y;
    snake->next = NULL;
    map[x][y] = SNAKE_HEAD;
    return snake;
}

void destroySnake(Snake *snake) {
    while (snake != NULL) {
        Snake *next = snake->next;
        free(snake);
        snake = next;
    }
}

void generateFood() {
    int x, y;
    do {
        x = rand() % MAP_WIDTH;
        y = rand() % MAP_HEIGHT;
    } while (map[x][y] != EMPTY);
    map[x][y] = FOOD;
}

void moveSnake(Snake *snake, int direction) {
    switch (direction) {
        case 0:
            snake->y--;
            break;
        case 1:
            snake->y++;
            break;
        case 2:
            snake->x--;
            break;
        case 3:
            snake->x++;
            break;
    }
}

void updateMap(Snake *snake) {
    for (int i = 0; i < MAP_WIDTH; i++) {
        for (int j = 0; j < MAP_HEIGHT; j++) {
            map[i][j] = EMPTY;
        }
    }
    Snake *current = snake;
    while (current != NULL) {
        map[current->x][current->y] = SNAKE_BODY;
        current = current->next;
    }
    map[snake->x][snake->y] = SNAKE_HEAD;
    map[food.x][food.y] = FOOD;
}

void render() {
    system("cls");
    for (int i = 0; i < MAP_WIDTH; i++) {
        for (int j = 0; j < MAP_HEIGHT; j++) {
            if (map[i][j] == EMPTY) {
                printf(" ");
            } else if (map[i][j] == SNAKE_HEAD) {
                printf("@");
            } else if (map[i][j] == SNAKE_BODY) {
                printf("#");
            } else if (map[i][j] == FOOD) {
                printf("$");
            }
        }
        printf("\n");
    }
    printf("Score: %d\n", score);
}

void gameOver(int score) {
    printf("Game Over!\n");
    printf("Score: %d\n", score);
    saveScore(score);
    exit(0);
}

void saveScore(int score) {
    FILE *fp = fopen("score.txt", "w");
    if (fp == NULL) {
        printf("Failed to save score.\n");
    } else {
        fprintf(fp, "%d", score);
        fclose(fp);
    }
}

int loadScore() {
    FILE *fp = fopen("score.txt", "r");
    if (fp == NULL) {
        printf("Failed to load score.\n");
        return 0;
    } else {
        int score;
        fscanf(fp, "%d", &score);
        fclose(fp);
        return score;
    }
}

以上是一个简单的用C语言实现的贪吃蛇游戏的代码，其中包括了数组、指针、文件和结构体的使用。请注意，此代码可能需要在Windows环境下编译运行。