写一个贪吃蛇游戏，c语言

好的，这是一个简单的贪吃蛇游戏的C语言代码，希望能帮到你。

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

#define ROW 20
#define COL 20
#define INIT_LENGTH 3

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

void init_map(int map[][COL], Snake *snake_head)
{
    for (int i = 0; i < ROW; i++)
    {
        for (int j = 0; j < COL; j++)
        {
            if (i == 0 || i == ROW - 1 || j == 0 || j == COL - 1)
            {
                map[i][j] = 1;
            }
            else
            {
                map[i][j] = 0;
            }
        }
    }
    Snake *p = snake_head;
    for (int i = 0; i < INIT_LENGTH; i++)
    {
        map[p->x][p->y] = 2;
        p = p->next;
    }
}

void print_map(int map[][COL])
{
    system("cls");
    for (int i = 0; i < ROW; i++)
    {
        for (int j = 0; j < COL; j++)
        {
            if (map[i][j] == 0)
            {
                printf("  ");
            }
            else if (map[i][j] == 1)
            {
                printf("# ");
            }
            else if (map[i][j] == 2)
            {
                printf("* ");
            }
            else if (map[i][j] == 3)
            {
                printf("+ ");
            }
        }
        printf("\n");
    }
}

void create_food(int map[][COL])
{
    int x, y;
    do
    {
        x = rand() % (ROW - 2) + 1;
        y = rand() % (COL - 2) + 1;
    } while (map[x][y] != 0);
    map[x][y] = 3;
}

void init_snake(Snake *snake_head)
{
    Snake *p = snake_head;
    for (int i = 0; i < INIT_LENGTH; i++)
    {
        p->x = ROW / 2;
        p->y = COL / 2 - i;
        p->next = (Snake *)malloc(sizeof(Snake));
        p = p->next;
    }
    p->next = NULL;
}

int move(Snake *snake_head, int map[][COL], int direction)
{
    Snake *p = snake_head;
    int x = p->x, y = p->y;
    if (direction == 'w')
    {
        x--;
    }
    else if (direction == 's')
    {
        x++;
    }
    else if (direction == 'a')
    {
        y--;
    }
    else if (direction == 'd')
    {
        y++;
    }
    if (map[x][y] == 1 || map[x][y] == 2)
    {
        return -1;
    }
    if (map[x][y] == 3)
    {
        map[x][y] = 2;
        Snake *new_node = (Snake *)malloc(sizeof(Snake));
        new_node->x = x;
        new_node->y = y;
        new_node->next = NULL;
        while (p->next)
        {
            p = p->next;
        }
        p->next = new_node;
        create_food(map);
    }
    else
    {
        map[p->x][p->y] = 0;
        map[x][y] = 2;
        p->x = x;
        p->y = y;
        while (p->next)
        {
            int temp_x = p->next->x;
            int temp_y = p->next->y;
            p->next->x = x;
            p->next->y = y;
            x = temp_x;
            y = temp_y;
            p = p->next;
        }
    }
    return 0;
}

int main()
{
    int map[ROW][COL];
    Snake *snake_head = (Snake *)malloc(sizeof(Snake));
    init_snake(snake_head);
    init_map(map, snake_head);
    create_food(map);
    print_map(map);
    int direction = 'd';
    while (1)
    {
        if (_kbhit())
        {
            int key = _getch();
            if (key == 'w' || key == 's' || key == 'a' || key == 'd')
            {
                if ((direction == 'w' && key == 's') || (direction == 's' && key == 'w') || (direction == 'a' && key == 'd') || (direction == 'd' && key == 'a'))
                {
                    continue;
                }
                direction = key;
            }
        }
        int ret = move(snake_head, map, direction);
        if (ret == -1)
        {
            printf("GAME OVER\n");
            break;
        }
        print_map(map);
        Sleep(200);
    }
    return 0;
}

这个代码使用了链表来表示贪吃蛇的身体，使用了随机数来生成食物，使用了`_kbhit()`和`_getch()`函数来获取键盘输入，使用了`Sleep()`函数来让程序暂停一段时间。在Windows下编译运行即可。