C语言贪吃蛇

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <termios.h>
#include <unistd.h>
#include <fcntl.h>

#define WIDTH 20
#define HEIGHT 15

// 地图
char map[HEIGHT][WIDTH];

// 蛇结构体
typedef struct {
	int x;
	int y;
} Segment;

// 蛇
Segment snake[(WIDTH * HEIGHT) / 2]; // 最大长度为地图面积的一半

// 蛇的长度
int snakeLength = 1;

// 方向
enum Direction { UP, DOWN, LEFT, RIGHT };
enum Direction direction = RIGHT;

// 食物
Segment food;

// 分数
int score = 0;

// 函数声明
void draw();
void generateFood();
int checkCollision(int x, int y);

// 捕获键盘输入
char getch() {
	char buf = 0;
	struct termios old = {0};
	if (tcgetattr(0, &old) < 0)
		perror("tcsetattr()");
	old.c_lflag &= ~ICANON;
	old.c_lflag &= ~ECHO;
	old.c_cc[VMIN] = 1;
	old.c_cc[VTIME] = 0;
	if (tcsetattr(0, TCSANOW, &old) < 0)
		perror("tcsetattr ICANON");
	if (read(0, &buf, 1) < 0)
		perror ("read()");
	old.c_lflag |= ICANON;
	old.c_lflag |= ECHO;
	if (tcsetattr(0, TCSADRAIN, &old) < 0)
		perror ("tcsetattr ~ICANON");
	return buf;
}


int main() {
	// 初始化地图
	for (int i = 0; i < HEIGHT; i++) {
		for (int j = 0; j < WIDTH; j++) {
			map[i][j] = ' ';
		}
	}

	// 初始化蛇的位置
	snake[0].x = WIDTH / 2;
	snake[0].y = HEIGHT / 2;

	// 生成食物
	generateFood();

	// 游戏主循环
	int running = 1;
	printf("按下键盘中的以移动(w上 s下 a左 d右 q退出 r重新开始): ");
	while (running) {
		
		system("clear");

		draw();

		char input = getch();// 获取用户输入

		// 更新蛇的方向
		enum Direction newDirection = direction;
		if (input == 'w') {
			newDirection = UP;
		} else if (input == 's') {
			newDirection = DOWN;
		} else if (input == 'a') {
			newDirection = LEFT;
		} else if (input == 'd') {
			newDirection = RIGHT;
		} else if (input == 'q') {
			running = 0;
		} else if (input == 'r') {
			// 重新初始化游戏状态
			snake[0].x = WIDTH / 2;
			snake[0].y = HEIGHT / 2;
			snakeLength = 1;
			direction = RIGHT;
			score = 0;
			generateFood();
			running = 1;
			continue;
		}

		direction = newDirection;
		printf("Direction:%c", input); //打印出方向
		// 计算新的蛇头位置
		int newHeadX = snake[0].x;
		int newHeadY = snake[0].y;
		if (direction == UP) {
			newHeadY--;
		} else if (direction == DOWN) {
			newHeadY++;
		} else if (direction == LEFT) {
			newHeadX--;
		} else if (direction == RIGHT) {
			newHeadX++;
		}

		// 检查是否撞到蛇身或出界
		if (checkCollision(newHeadX, newHeadY)) {
			running = 0;
			printf("Game Over\n");
			break;
		}

		// 更新蛇的位置
		for (int i = snakeLength - 1; i > 0; i--) {
			snake[i] = snake[i - 1];
		}
		snake[0].x = newHeadX;
		snake[0].y = newHeadY;

		// 判断是否吃到食物
		if (newHeadX == food.x && newHeadY == food.y) {
			score++;
			generateFood();
			snakeLength++;
		}
	}

	return 0;
}

// 绘制地图
void draw() {
	// 清空地图
	for (int i = 0; i < HEIGHT; i++) {
		for (int j = 0; j < WIDTH; j++) {
			map[i][j] = ' ';
		}
	}

	// 绘制蛇
	for (int i = 0; i < snakeLength; i++) {
		int x = snake[i].x;
		int y = snake[i].y;
		if (i == 0) {
			map[y][x] = 'O'; // 蛇头
		} else {
			map[y][x] = 'o'; // 蛇身
		}
	}

	// 绘制食物
	int x = food.x;
	int y = food.y;
	map[y][x] = '*';

	// 打印地图和分数
	for (int i = 0; i < HEIGHT; i++) {
		for (int j = 0; j < WIDTH; j++) {
			printf("%c", map[i][j]);
		}
		printf("\n");
	}
	printf("Score: %d\n", score);
}

// 生成食物
void generateFood() {
	srand(time(NULL));
	food.x = rand() % WIDTH;
	food.y = rand() % HEIGHT;
}

// 检查是否撞到蛇身或出界
int checkCollision(int x, int y) {
	// 是否出界
	if (x < 0 || x >= WIDTH || y < 0 || y >= HEIGHT) {
		return 1;
	}

	// 是否撞到蛇身
	for (int i = 0; i < snakeLength; i++) {
		if (snake[i].x == x && snake[i].y == y) {
			return 1;
		}
	}

	return 0;
}