c语言贪吃蛇代码及解析

c语言贪吃蛇代码及解析

以下是一个使用C语言编写的简单贪吃蛇游戏，包括初始化游戏界面、绘制蛇和食物、移动蛇和检测碰撞等功能。

```c

#include <stdio.h>

#include <conio.h>

#include <windows.h>

// 定义常量

const int width = 20;

const int height = 20;

const int max_length = 5;

const int block_size = 20;

const char direction[] = "RDLU";

const int food_x = 10;

const int food_y = 10;

const int snake_speed = 100;

// 定义结构体，存储蛇的身体坐标和方向

struct Snake {

    int x, y;

    int length;

    char direction;

};

// 定义结构体，存储食物的位置和状态(是否被吃掉)

struct Food {

    int x, y;

};

// 定义全局变量，存储蛇和食物的信息

struct Snake snake;

struct Food food;

int score;

// 初始化游戏界面和蛇的状态(位置和长度)

void init() {

    // 初始化窗口大小和标题栏

    SetConsoleScreenBufferSize(GetStdHandle(STD_OUTPUT_HANDLE), width * block_size, height * block_size);

    GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &buffer_info);

    SetConsoleWindowInfo(GetStdHandle(STD_OUTPUT_HANDLE), TRUE, NULL, NULL, buffer_info.dwMaximumWindowSize);

    printf("Snake Game!

");

    fflush(stdout);

    // 初始化蛇的位置和长度为3个方块，方向为左移符('L')

    snake.x = height / 2;

    snake.y = height / 2;

    snake.length = 3;

    snake.direction = 'L';

    // 随机生成一个食物的位置和状态(是否被吃掉)

    srand((unsigned)time(NULL));

    food.x = (rand() % (width * block_size)) + food_x;

    food.y = (rand() % (height * block_size)) + food_y;

}

// 在屏幕上绘制蛇和食物的图像

void draw() {

    RECT rect;

    int i;

    // 根据蛇的位置和方向计算出每个方块的坐标和颜色值(RGB)

    i = snake.length;

    int colorR = (snake.direction & 'R') == 'R'?155:155-(snake.length-i)*20;

    int colorG = (snake.direction & 'G') == 'G'?180:180-(snake.length-i)*20;

    int colorB = (snake.direction & 'B') == 'B'?25:25-(snake.length-i)*20;

    int colorD = (snake.direction & 'D') == 'D'?0:0-(snake.length-i)*20;

    int colorE = (snake.direction & 'E') == 'E'?7:7-(snake.length-i)*20;

    int colorF = (snake.direction & 'F') == 'F'?145:145-(snake.length-i)*20;

    int colorY = (snake.direction & 'Y') == 'Y'?11:11-(snake.length-i)*20;

    int colorX = (snake.direction & 'X') == 'X'?191:191-(snake.length-i)*20;

    int colorN = (snake.direction & 'N') == 'N'?165:165-(snake.length-i)*20;

    int colorM = (snake.direction & 'M') == 'M'?135:135-(snake.length-i)*20;