C语言——贪食蛇简单实现

通过easyx图形库对贪食蛇的简单实现。

/************************************************
*
*		名称：贪食蛇
*		工具：VS2015
*		作者：黑盒子
*
*************************************************/

#include 
#include 
#include 
#include 
#include 
#include 

#pragma comment(lib,"winmm.lib")

#define SNAKE_LENGTH 100  //蛇的最大长度
#define SNAKESIZE 10 //食物大小

void InitSnake();
void DrawSnake();
void MoveSnake();
void ChangeSnake();
void CoorFood();
void DrawFood();
int EatFood();
void BreakSnake();
void OverSnake();

typedef enum ch
{
	up = 72,
	down = 80,
	left = 75,
	right = 77
}Ch;
//定义坐标结构体
struct Coor
{
	int x;
	int y;
}COOR;
//定义蛇的结构体 蛇的属性（长度 坐标 方向）
struct Snake
{
	Coor szb[SNAKE_LENGTH];   //蛇每一节的坐标
	int n;						//当前长度
	Ch ch;						//方向
}SNAKE;
//定义食物的结构体
struct Food
{
	Coor fzb;
	int flag;      //flag=0表示食物没有被吃 反之表示被吃了，
	//flag 来限制食物的不断出现，每次只出现一个食物
}FOOD;

int main()
{
	int flag=0;
	InitSnake();
	while (1)
	{
		while (!_kbhit())
		{
			if (flag == 0)
			{
				CoorFood();
			}
			DrawFood();
			BreakSnake();
			MoveSnake();
			flag = EatFood();
			Sleep(100);
		}
		ChangeSnake();
	}
	getchar();
	return 0;
}

void InitSnake()
{
	initgraph(640, 480);
	
	mciSendString(L"open TheFatRat-Unity.mp3 alias bgm", 0, 0, 0);
	mciSendString(L"play bgm repeat", 0, 0, 0);
	SNAKE.szb[0].x = 0;		//第一节蛇的坐标
	SNAKE.szb[0].y = 0;
	SNAKE.n = 1;			//蛇的初始节数
	SNAKE.ch = right;
	rectangle(0, 0, 10, 10);//试用小矩形来初始化小蛇
	setbkcolor(RED);
	cleardevice();
}

//在界面上画蛇
void DrawSnake()
{
	for (int i = SNAKE.n-1; i >= 0; i--)
	{
		rectangle(SNAKE.szb[i].x, SNAKE.szb[i].y, 
			SNAKE.szb[i].x + SNAKESIZE, SNAKE.szb[i].y + SNAKESIZE);
	}
	setcolor(RED);
	rectangle(SNAKE.szb[SNAKE.n].x, SNAKE.szb[SNAKE.n].y,
				SNAKE.szb[SNAKE.n].x + SNAKESIZE,
				SNAKE.szb[SNAKE.n].y + SNAKESIZE);

	setcolor(WHITE);
	rectangle(SNAKE.szb[SNAKE.n-1].x, SNAKE.szb[SNAKE.n-1].y,
		SNAKE.szb[SNAKE.n-1].x + SNAKESIZE,
		SNAKE.szb[SNAKE.n-1].y + SNAKESIZE);
}

//移动
void MoveSnake()
{
	for (int i = SNAKE.n; i > 0; i--)
	{
		SNAKE.szb[i].x = SNAKE.szb[i - 1].x;
		SNAKE.szb[i].y = SNAKE.szb[i - 1].y;
	}
	switch (SNAKE.ch)
	{
	case up:
		SNAKE.szb[0].y -= SNAKESIZE;
		break;
	case down:
		SNAKE.szb[0].y += SNAKESIZE;
		break;
	case left:
		SNAKE.szb[0].x -= SNAKESIZE;
		break;
	case right:
		SNAKE.szb[0].x += SNAKESIZE;
		break;
	}
	DrawSnake();
}

//让蛇移动  接收键盘方向键
void ChangeSnake()
{
	int move;
	move = getch();

	switch (move)
	{
	case up:
		if (SNAKE.ch != down)
		{
			SNAKE.ch = up;
		}
		break;

	case down:
		if (SNAKE.ch != up)
		{
			SNAKE.ch = down;
		}
		break;
	case left:
		if (SNAKE.ch != right)
		{
			SNAKE.ch = left;
		}
		break;
	case right:
		if (SNAKE.ch != left)
		{
			SNAKE.ch = right;
		}
		break;
	}
}

//生成食物
void DrawFood()
{
	setcolor(WHITE);

	roundrect(FOOD.fzb.x, FOOD.fzb.y, FOOD.fzb.x + SNAKESIZE,
		FOOD.fzb.y + SNAKESIZE, 10, 10);
}

void CoorFood()
{
	srand(unsigned(time(NULL)));

	FOOD.fzb.x = rand() % (640 / SNAKESIZE)*SNAKESIZE;
	FOOD.fzb.y = rand() % (480 / SNAKESIZE)*SNAKESIZE;
	FOOD.flag = 1;
}

int EatFood()
{
	if (SNAKE.szb[0].x == FOOD.fzb.x&&SNAKE.szb[0].y == FOOD.fzb.y)
	{
		SNAKE.n++;
		setcolor(RED);
		roundrect(FOOD.fzb.x, FOOD.fzb.y, FOOD.fzb.x + SNAKESIZE,
			FOOD.fzb.y + SNAKESIZE, 10, 10);
		setcolor(WHITE);

		FOOD.flag = 0;
		return FOOD.flag;
	}
	return 1;
}

//判断是否撞墙或自己
void BreakSnake()
{
	if (SNAKE.szb[0].x < 0 || SNAKE.szb[0].x>640 ||
		SNAKE.szb[0].y < 0 || SNAKE.szb[0].y>470)//是否超出范围
	{
		OverSnake();
	}
	for (int i = SNAKE.n-2; i < SNAKE.n - 2; i--)
	{
		if (SNAKE.szb[0].x == SNAKE.szb[i].x&&
			SNAKE.szb[0].y == SNAKE.szb[i].y)
		{
			OverSnake();
		}
	}
}

void OverSnake()
{
	cleardevice();
	setcolor(YELLOW);
	settextstyle(50, 0, L"华文彩云");
	outtextxy(200, 150, L"you loss!");
	outtextxy(180, 200, L"即将退出游戏-_-");

	Sleep(2000);
	closegraph();
	exit(0);
}

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