贪吃蛇C语言代码，使用线程和定时器

以下是贪吃蛇的C语言代码，使用了线程和定时器实现：

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

#define MAP_WIDTH 40
#define MAP_HEIGHT 20
#define SNAKE_INIT_LENGTH 3
#define SNAKE_MAX_LENGTH 100

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

// 定义蛇的结构体
struct Snake {
    int x[SNAKE_MAX_LENGTH];
    int y[SNAKE_MAX_LENGTH];
    int length;
    enum Direction direction;
};

// 定义食物的结构体
struct Food {
    int x;
    int y;
};

// 定义地图
char map[MAP_HEIGHT][MAP_WIDTH];

// 定义蛇和食物
struct Snake snake;
struct Food food;

// 定义线程和定时器
HANDLE hTimer;
HANDLE hThread;

// 初始化地图
void init_map() {
    int i, j;
    for (i = 0; i < MAP_HEIGHT; i++) {
        for (j = 0; j < MAP_WIDTH; j++) {
            if (i == 0 || i == MAP_HEIGHT - 1 || j == 0 || j == MAP_WIDTH - 1)
                map[i][j] = '#';
            else
                map[i][j] = ' ';
        }
    }
}

// 初始化蛇
void init_snake() {
    int i;
    snake.length = SNAKE_INIT_LENGTH;
    snake.direction = RIGHT;
    for (i = 0; i < SNAKE_INIT_LENGTH; i++) {
        snake.x[i] = MAP_WIDTH / 2 - i;
        snake.y[i] = MAP_HEIGHT / 2;
    }
}

// 初始化食物
void init_food() {
    srand(time(NULL));
    food.x = rand() % (MAP_WIDTH - 2) + 1;
    food.y = rand() % (MAP_HEIGHT - 2) + 1;
}

// 更新地图
void update_map() {
    int i, j;
    for (i = 0; i < MAP_HEIGHT; i++) {
        for (j = 0; j < MAP_WIDTH; j++) {
            if (i == 0 || i == MAP_HEIGHT - 1 || j == 0 || j == MAP_WIDTH - 1)
                map[i][j] = '#';
            else
                map[i][j] = ' ';
        }
    }
    for (i = 0; i < snake.length; i++) {
        map[snake.y[i]][snake.x[i]] = '*';
    }
    map[food.y][food.x] = '@';
}

// 控制蛇的移动
void move_snake() {
    int i;
    for (i = snake.length - 1; i > 0; i--) {
        snake.x[i] = snake.x[i - 1];
        snake.y[i] = snake.y[i - 1];
    }
    switch (snake.direction) {
        case UP:
            snake.y[0]--;
            break;
        case DOWN:
            snake.y[0]++;
            break;
        case LEFT:
            snake.x[0]--;
            break;
        case RIGHT:
            snake.x[0]++;
            break;
    }
}

// 判断蛇是否吃到食物
void eat_food() {
    if (snake.x[0] == food.x && snake.y[0] == food.y) {
        snake.length++;
        if (snake.length > SNAKE_MAX_LENGTH)
            snake.length = SNAKE_MAX_LENGTH;
        init_food();
    }
}

// 判断蛇是否撞墙或者撞到自己
int is_dead() {
    int i;
    if (snake.x[0] == 0 || snake.x[0] == MAP_WIDTH - 1 || snake.y[0] == 0 || snake.y[0] == MAP_HEIGHT - 1)
        return 1;
    for (i = 1; i < snake.length; i++) {
        if (snake.x[0] == snake.x[i] && snake.y[0] == snake.y[i])
            return 1;
    }
    return 0;
}

// 游戏结束
void gameover() {
    printf("Game Over!\n");
    printf("Press any key to continue...\n");
    _getch();
    exit(0);
}

// 控制蛇的方向
void control() {
    if (_kbhit()) {
        switch (_getch()) {
            case 'w':
                if (snake.direction != DOWN)
                    snake.direction = UP;
                break;
            case 's':
                if (snake.direction != UP)
                    snake.direction = DOWN;
                break;
            case 'a':
                if (snake.direction != RIGHT)
                    snake.direction = LEFT;
                break;
            case 'd':
                if (snake.direction != LEFT)
                    snake.direction = RIGHT;
                break;
        }
    }
}

// 定时器回调函数
VOID CALLBACK timer_callback(PVOID lpParameter, BOOLEAN TimerOrWaitFired) {
    move_snake();
    eat_food();
    update_map();
    control();
    if (is_dead())
        gameover();
}

// 线程函数
DWORD WINAPI thread_func(LPVOID lpParam) {
    while (1) {
        WaitForSingleObject(hTimer, INFINITE);
    }
    return 0;
}

// 主函数
int main() {
    init_map();
    init_snake();
    init_food();
    update_map();
    printf("Press any key to start...\n");
    _getch();
    hTimer = CreateWaitableTimer(NULL, FALSE, NULL);
    LARGE_INTEGER liDueTime;
    liDueTime.QuadPart = 0;
    SetWaitableTimer(hTimer, &liDueTime, 1000 / 10, timer_callback, NULL, FALSE);
    hThread = CreateThread(NULL, 0, thread_func, NULL, 0, NULL);
    while (1) {
        system("cls");
        int i, j;
        for (i = 0; i < MAP_HEIGHT; i++) {
            for (j = 0; j < MAP_WIDTH; j++) {
                printf("%c", map[i][j]);
            }
            printf("\n");
        }
        Sleep(1000 / 10);
    }
    return 0;
}

上面的代码中，使用了定时器和线程来控制蛇的移动和游戏的进行。其中，定时器用来定时调用回调函数，线程用来等待定时器的信号。回调函数中包含了蛇的移动、吃食物、更新地图、控制方向等逻辑，线程函数中输出地图并等待定时器的信号。通过这种方式，可以实现一个简单的贪吃蛇游戏。