帮我用c语言写个贪吃蛇

好的，我会根据您的要求使用 C 语言来编写贪吃蛇游戏。以下是代码示例：

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

// 定义常量
#define WIDTH 30
#define HEIGHT 20
#define MAX_LEN (WIDTH - 2) * (HEIGHT - 2)

// 定义蛇的结构体
struct Snake{
    int x;
    int y;
};

// 初始化蛇
void init_snake(struct Snake s[], int len){
    int i;
    for(i = 0; i < len; i++){
        s[i].x = WIDTH / 2 + 1 - i;
        s[i].y = HEIGHT / 2;
    }
}

// 画出边框
void draw_border(){
    int i, j;
    for(i = 0; i <= HEIGHT; i++){
        for(j = 0; j <= WIDTH; j++){
            if(i == 0 || i == HEIGHT || j == 0 || j == WIDTH){
                printf("#");
            }
            else{
                printf(" ");
            }
        }
        printf("\n");
    }
}

// 画出蛇
void draw_snake(struct Snake s[], int len){
    int i;
    for(i = 0; i < len; i++){
        printf("O");
        gotoxy(s[i].x, s[i].y);
    }
}

// 生成食物
void generate_food(int *food_x, int *food_y){
    srand((unsigned)time(NULL));
    *food_x = rand() % (WIDTH - 2) + 1;
    *food_y = rand() % (HEIGHT - 2) + 1;
}

// 判断是否吃到食物
int eat_food(struct Snake s[], int len, int food_x, int food_y){
    if(s[0].x == food_x && s[0].y == food_y){
        len++;
        s[len-1].x = s[len-2].x;
        s[len-1].y = s[len-2].y;
        return 1;
    }
    return 0;
}

// 判断是否撞到自己
int hit_self(struct Snake s[], int len){
    int i;
    for(i = 1; i < len; i++){
        if(s[0].x == s[i].x && s[0].y == s[i].y){
            return 1;
        }
    }
    return 0;
}

// 判断是否撞墙
int hit_wall(struct Snake s[]){
    if(s[0].x == 0 || s[0].x == WIDTH || s[0].y == 0 || s[0].y == HEIGHT){
        return 1;
    }
    return 0;
}

// 控制蛇的移动
void move(struct Snake s[], int len, int food_x, int food_y){
    int i;
    int key;
    int old_x, old_y;
    while(1){
        old_x = s[len-1].x;
        old_y = s[len-1].y;
        for(i = len-1; i > 0; i--){
            s[i].x = s[i-1].x;
            s[i].y = s[i-1].y;
        }
        key = getch();
        switch(key){
            case 72: // 上
                s[0].y--;
                break;
            case 80: // 下
                s[0].y++;
                break;
            case 75: // 左
                s[0].x--;
                break;
            case 77: // 右
                s[0].x++;
                break;
            default:
                break;
        }
        if(hit_wall(s) || hit_self(s, len)){
            printf("Game Over!\n");
            break;
        }
        if(eat_food(s, len, food_x, food_y)){
            len++;
            generate_food(&food_x, &food_y);
        }
        system("cls");
        draw_border();
        printf("Score: %d\n", len-3);
        gotoxy(food_x, food_y);
        printf("$");
        draw_snake(s, len);
        Sleep(200);
    }
}

int main(){
    int food_x, food_y;
    struct Snake s[MAX_LEN];
    int len = 3;
    draw_border();
    init_snake(s, len);
    generate_food(&food_x, &food_y);
    gotoxy(food_x, food_y);
    printf("$");
    draw_snake(s, len);
    printf("Score: 0\n");
    move(s, len, food_x, food_y);
    return 0;
}

希望这个代码能够满足您的需求。如果您还有其他问题或需求，欢迎继续咨询我。