#include"snake.h"

void test()
{
	//修改适配本地中文环境
	setlocale(LC_ALL, "");
	bool c = false;
	char str[4] = " ";
	do
	{
		Snake snake = { 0 };
		GameStart(&snake);//游戏开始前的初始化
		GameRun(&snake);//玩游戏的过程
		GameEnd(&snake);//善后的工作
		outtextxy(350, 500, "再来一局吗？(Yes/No):");
		scanf("%s", str);
		c = Determine(str);
	} while (c);
}
int main()
{
	//修改适配本地中文环境
	setlocale(LC_ALL, "");
	test();
	return 0;
}

snake.cpp

#include"snake.h"

void GameStart(pSnake ps) {
	//设置控制台信息，窗口大小，窗口名
	initgraph(1300, 720, EX_SHOWCONSOLE);


	//打印欢迎信息
	WelcomeToGame();

	//绘制地图
	CreateMap();

	//初始化蛇
	InitSnake(ps);

	//创建食物
	CreateFood(ps);
}

//打印欢迎信息
void WelcomeToGame() {
	//欢迎信息
	system("title 贪吃蛇");
	outtextxy(500, 350, "欢迎来到贪吃蛇小游戏");
	outtextxy(600, 400, "随意点击屏幕继续. . .");
	//随意点击屏幕
	system("pause");
	
	//清空屏幕，换画面
	cleardevice();

	//功能介绍信息
	outtextxy(400, 350, "1.用 ↑   ↓   ←   → 来控制蛇的移动，F3是加速，F4是减速");
	outtextxy(400, 370, "2.加速能得到更高的分数");
	outtextxy(600, 400, "随意点击屏幕继续. . .");

	//打印尾巴信息
	system("pause");
	//清空桌面
	cleardevice();

}
//绘制地图
void CreateMap() {
	IMAGE img1;
	//玩游戏背景图
	loadimage(&img1, "picture.jpg\\picture.jpg", 900, 700, true);
	//从0，开始画图
	putimage(0, 0, &img1);
	//画线矩形
	setlinecolor(GREEN);
	//rectangle(0, 0, 900, 699);
	//rectangle(3, 3, 897, 697);
	//上
	int i = 0;
	for (i = 0; i <= 900; i += 15)
	{
		rectangle(i, 0, i + 13, 13);
	}
	//下
	for (i = 0; i <= 900; i += 15)
	{
		rectangle(i, 700, i + 13, 700 + 13);
	}
	//左
	for (i = 20; i < 700; i += 20)
	{
		rectangle(0, i , 0 + 13, i + 17);

	}
	//右
	for (i = 1; i <  700; i += 20)
	{
		rectangle(900, i, 900 + 13, i + 17);
	}

}

//初始化蛇
void InitSnake(pSnake ps) {
	//创建5个节点
	pSnakeNode cur = NULL;
	for (int i = 0; i < 5; i++) {
		cur = (pSnakeNode)malloc(sizeof(SnakeNode));
		if (cur == NULL) {
			perror("malloc fail!");
			return;
		}
		cur->x = POS_X + i * 15;
		cur->y = POS_Y;
		cur->next = NULL;
		if (ps->pSnake == NULL) {
			ps->pSnake = cur;
		}
		else {
			cur->next = ps->pSnake;
			ps->pSnake = cur;
		}
	}
	//打印蛇的位置
	cur = ps->pSnake;
	while (cur) {
		picture(cur->x, cur->y);
		cur = cur->next;
	}
	//初始化贪吃蛇其他属性
	ps->dir = RIGHT;//向右
	ps->pFood = NULL;
	ps->Score = 0;
	ps->FoodWeight = 10;
	ps->SleepTime = 200;
	ps->status = OK;
}
//打印蛇身
void picture(int x, int y) {
	IMAGE img1;
	loadimage(&img1, "picture.jpg\\picture2.jpg", SIZE_X, SIZE_Y, true);
	putimage(x, y, &img1);
}

//创建食物
void CreateFood(pSnake ps) {
	pSnakeNode pNext = (pSnakeNode)malloc(sizeof(SnakeNode));
	if (pNext == NULL) {
		perror("pNext malloc fail!");
		return;
	}
	int x = 0;
	int y = 0;
circulate:
	do {
		//避免出现在（0，0）
		x = rand() % 871 + 15 ;
		y = rand() % 681 + 20;
	} while (x % 15 != 0 || y % 20 != 0);
	pSnakeNode cur = ps->pSnake;
	while (cur) {
		if (cur->x == x && cur->y == y) {
			goto circulate;
		}
		cur = cur->next;
	}
	pNext->x = x;
	pNext->y = y;
	pNext->next = NULL;
	//维护食物
	ps->pFood = pNext;

	//打印食物
	IMAGE img3;
	loadimage(&img3, "picture.jpg\\R-C (1).jpg", 15, 20, true);
	putimage(x, y, &img3);

}
//玩游戏的过程
void GameRun(pSnake ps) {
	//打印帮助(规则)信息
	PrintHelpInfo();

	do {
		//当前分数情况
		Score(ps);
		//向上
		if (KEY_PRESS(VK_UP) && ps->dir != DOWN) {
			ps->dir = UP;
		}
		//向下
		else if (KEY_PRESS(VK_DOWN) && ps->dir != UP) {
			ps->dir = DOWN;
		}
		//向左
		else if (KEY_PRESS(VK_LEFT) && ps->dir != RIGHT) {
			ps->dir = LEFT;
		}
		//向右
		else if (KEY_PRESS(VK_RIGHT) && ps->dir != LEFT) {
			ps->dir = RIGHT;
		}
		//暂停
		else if (KEY_PRESS(VK_SPACE)) {
			//游戏要暂停
			pause();
		}
		//加速
		else if (KEY_PRESS(VK_F3)) {
			if (ps->FoodWeight < 16) {
				ps->FoodWeight += 2;
				ps->SleepTime -= 50;
			}
		}
		//减速
		else if (KEY_PRESS(VK_F4)) {
			if (ps->FoodWeight > 4) {
				ps->FoodWeight -= 2;
				ps->SleepTime += 50;

			}
		}
		//退出游戏
		else if (KEY_PRESS(VK_ESCAPE)) {
			ps->status = ESC;
		}
		//走一步
		SnakeMove(ps);

		//休眠
		Sleep(ps->SleepTime);

	} while (ps->status == OK);

}

//打印帮助(规则)信息
void PrintHelpInfo() {
	//规则
	setlinecolor(MAGENTA);
	rectangle(918, 50, 1250, 180);
	outtextxy(930, 60, "1.不能穿墙，不能咬到自己");
	outtextxy(930, 80, "2.用 ↑.↓.←.→ 来控制蛇的移动");
	outtextxy(930, 100, "3.F3是加速，F4是减速");
	outtextxy(930, 120, "4.一个食物基础分10分");
	outtextxy(930, 140, "5.加速一次加2分，最大加6分");
	outtextxy(930, 160, "6.减速一次减2分，最大减6分");

}
//当前分数情况
void Score(pSnake ps) {
	char num1[10];
	char num2[10];
	sprintf(num1, "%d", ps->Score);
	sprintf(num2, "%d", ps->FoodWeight);
	outtextxy(930, 300, "当前总积分：");
	outtextxy(1020, 300, num1);
	outtextxy(930, 340, "当前一个食物积分：");
	outtextxy(1065, 340, num2);
}
//游戏要暂停
void pause() {
	while (true) {

		if (KEY_PRESS(VK_SPACE)) {
			break;
		}
		Sleep(200);
	}
}
//蛇走一步
void SnakeMove(pSnake ps) {
	//生成下一个走过的节点
	pSnakeNode pNext = (pSnakeNode)malloc(sizeof(SnakeNode));
	if (pNext == NULL) {
		perror("malloc tail");
		return;
	}
	pNext->next = NULL;
	//向上
	if (ps->dir == UP) {
		pNext->x = ps->pSnake->x;
		pNext->y = ps->pSnake->y - 20;
	}
	//向下
	else if (ps->dir == DOWN) {
		pNext->x = ps->pSnake->x;
		pNext->y = ps->pSnake->y + 20;

	}
	//向右
	else if (ps->dir == LEFT) {
		pNext->x = ps->pSnake->x - 15;
		pNext->y = ps->pSnake->y;
	}
	//向左
	else if (ps->dir == RIGHT) {
		pNext->x = ps->pSnake->x + 15;
		pNext->y = ps->pSnake->y;
	}

	//下一个坐标处是否是食物
	if (NextIsFood(ps, pNext))
	{
		//是食物就吃掉
		EatFood(ps, pNext);
	}
	else
	{
		//不是食物就正常一步
		NotEatFood(ps, pNext);
	}
	//检测撞墙
	KillByWall(ps);

	//检测撞到自己
	KillBySelf(ps);
}
//判断下一个坐标是不是食物
bool NextIsFood(pSnake ps, pSnakeNode pNext) {
	if (ps->pFood->x == pNext->x && ps->pFood->y == pNext->y) {
		return true;
	}
	else {
		return false;
	}
}

//是食物就吃掉
void EatFood(pSnake ps, pSnakeNode pNext) {
	//头插
	pNext->next = ps->pSnake;
	ps->pSnake = pNext;

	//打印蛇
	pSnakeNode cur = ps->pSnake;
	while (cur) {
		picture(cur->x, cur->y);S
		cur = cur->next;
	}
	//改变分数
	ps->Score += ps->FoodWeight;

	//释放旧的食物
	free(ps->pFood);

	//重新生成食物
	CreateFood(ps);
}
//不是食物就正常一步
void NotEatFood(pSnake ps, pSnakeNode pNext) {
	//头插
	pNext->next = ps->pSnake;
	ps->pSnake = pNext;

	pSnakeNode cur = ps->pSnake;
	while (cur->next->next) {
		picture(cur->x, cur->y);
		cur = cur->next;
	}
	//把尾巴打印成背景图片	
	IMAGE img4;
	loadimage(&img4, "picture.jpg\\picture4.jpg", SIZE_X, SIZE_Y, true);
	putimage(cur->next->x, cur->next->y, &img4);
	//释放尾部
	free(cur->next);
	cur->next = NULL;
}
//检测撞墙
void KillByWall(pSnake ps) {
	if (ps->pSnake->x == 885 ||
		ps->pSnake->y == 680 ||
		ps->pSnake->x == 15 ||
		ps->pSnake->y == 20)
	{
		ps->status = KILL_BY_WALL;
		return;
	}
}
//检测撞到自己
void KillBySelf(pSnake ps) {
	pSnakeNode cur = ps->pSnake->next;
	while (cur) {
		if (cur->x == ps->pSnake->x && cur->y == ps->pSnake->y)
		{
			ps->status = KILL_BY_SELF;
			return;
		}
		cur = cur->next;
	}
}
//结束游戏后的工作
void GameEnd(pSnake ps)
{
	
	switch (ps->status)
	{
	case ESC:
		outtextxy(330, 300, "主动退出游戏，正常退出\n");
		break;
	case KILL_BY_WALL:
		outtextxy(330, 300, "很遗憾，撞墙了，游戏结束\n");
		break;
	case KILL_BY_SELF:
		outtextxy(330, 300, "很遗憾，咬到自己了，游戏结束\n");
		break;
	}
	//释放贪吃蛇的链表资源
	pSnakeNode cur = ps->pSnake;
	pSnakeNode del = NULL;

	while (cur)
	{
		del = cur;
		cur = cur->next;
		free(del);
	}
	//把最后打印的食物打印成背景图片
	IMAGE img4;
	loadimage(&img4, "picture.jpg\\picture4.jpg", SIZE_X, SIZE_Y, true);
	putimage(ps->pFood->x, ps->pFood->y, &img4);
	free(ps->pFood);
	ps = NULL;
}

//判断是否再来一局
bool Determine(char str[]) {
	char arr[4] = "Yes";
	int ret = strcmp(str, arr);
	if (ret == 0) {
		return true;
	}
	else {
		return false;
	}
}

好啦今天的分享就到这里了，感谢观看。