帮我用c语言写个贪吃蛇的小游戏

好的，以下是一个简单的贪吃蛇小游戏的 C 语言代码：

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

#define WIDTH 30
#define HEIGHT 20

int snake[WIDTH * HEIGHT][2];
int food[2];
int length = 3;
int direction = 0;
int score = 0;

void init() {
    int i, j;
    for (i = 0; i < WIDTH; i++) {
        for (j = 0; j < HEIGHT; j++) {
            if (i == 0 || i == WIDTH - 1 || j == 0 || j == HEIGHT - 1) {
                printf("#");
            } else {
                printf(" ");
            }
        }
        printf("\n");
    }
    srand(time(NULL));
    food[0] = rand() % (WIDTH - 2) + 1;
    food[1] = rand() % (HEIGHT - 2) + 1;
    printf("Score: %d\n", score);
}

void draw() {
    int i, j;
    for (i = 0; i < WIDTH; i++) {
        for (j = 0; j < HEIGHT; j++) {
            int flag = 0;
            int k;
            for (k = 0; k < length; k++) {
                if (snake[k][0] == i && snake[k][1] == j) {
                    printf("O");
                    flag = 1;
                    break;
                }
            }
            if (!flag) {
                if (i == 0 || i == WIDTH - 1 || j == 0 || j == HEIGHT - 1) {
                    printf("#");
                } else if (i == food[0] && j == food[1]) {
                    printf("*");
                } else {
                    printf(" ");
                }
            }
        }
        printf("\n");
    }
    printf("Score: %d\n", score);
}

void update() {
    int i;
    for (i = length - 1; i > 0; i--) {
        snake[i][0] = snake[i - 1][0];
        snake[i][1] = snake[i - 1][1];
    }
    switch (direction) {
        case 0:
            snake[0][1]--;
            break;
        case 1:
            snake[0][0]++;
            break;
        case 2:
            snake[0][1]++;
            break;
        case 3:
            snake[0][0]--;
            break;
    }
    if (snake[0][0] == food[0] && snake[0][1] == food[1]) {
        length++;
        score += 10;
        food[0] = rand() % (WIDTH - 2) + 1;
        food[1] = rand() % (HEIGHT - 2) + 1;
    }
    if (snake[0][0] == 0 || snake[0][0] == WIDTH - 1 || snake[0][1] == 0 || snake[0][1] == HEIGHT - 1) {
        printf("Game over!\n");
        exit(0);
    }
    for (i = 1; i < length; i++) {
        if (snake[0][0] == snake[i][0] && snake[0][1] == snake[i][1]) {
            printf("Game over!\n");
            exit(0);
        }
    }
}

int main() {
    int i;
    for (i = 0; i < length; i++) {
        snake[i][0] = WIDTH / 2 + i;
        snake[i][1] = HEIGHT / 2;
    }
    init();
    while (1) {
        if (_kbhit()) {
            char ch = _getch();
            if (ch == 'w' || ch == 'W') {
                if (direction != 2) {
                    direction = 0;
                }
            } else if (ch == 'd' || ch == 'D') {
                if (direction != 3) {
                    direction = 1;
                }
            } else if (ch == 's' || ch == 'S') {
                if (direction != 0) {
                    direction = 2;
                }
            } else if (ch == 'a' || ch == 'A') {
                if (direction != 1) {
                    direction = 3;
                }
            }
        }
        update();
        system("cls");
        draw();
        Sleep(100);
    }
    return 0;
}

这个代码使用了 Windows 系统的 conio.h 库，所以在 Linux 等系统上可能无法编译运行。如果需要在 Linux 上运行，可以使用 ncurses 库来实现类似的效果。