C语言——贪吃蛇

admin • • C/C++

一. 游戏效果

贪吃蛇

贪吃蛇穿墙版

二. 游戏背景

贪吃蛇是久负盛名的游戏，它也和俄罗斯⽅块，扫雷等游戏位列经典游戏的⾏列。
贪吃蛇起源于1977年的投币式墙壁游戏《Blockade》，后移植到各种平台上。具体如下：

起源。1977年，投币式墙壁游戏生产商Gremlin推出了经典的街机游戏《Blockade》，两名玩家要分别控制角色移动，角色会不停长大，而且走过的地方会变成围栏，谁先碰到围栏或碰到自己的身体就算输。
贪吃蛇最初的版本是像素版本，后来又衍生出3D版本、多人对战版本等2 3。

 

三、游戏开发日志

四、知识准备 

本次实现贪吃蛇会使⽤到的⼀些Win32 API知识，那么就学习⼀下

4.1 Win32 API

Windows 这个多作业系统除了协调应⽤程序的执⾏、分配内存、管理资源之外， 它同时也是⼀个很⼤的服务中⼼，调⽤这个服务中⼼的各种服务（每⼀种服务就是⼀个函数），可以帮应⽤程式达到开启 视窗、描绘图形、使⽤周边设备等⽬的，由于这些函数服务的对象是应⽤程序(Application)， 所以便 称之为 Application Programming Interface，
简称 API 函数。
WIN32 API也就是Microsoft Windows 32位平台的应⽤程序编程接⼝。

4.2 控制台程序

平常我们运⾏起来的⿊框程序其实就是控制台程序。
我们可以使⽤cmd命令来设置控制台窗⼝的⻓宽，也可以通过命令设置控制台窗⼝的名字：
设置控制台窗⼝的⼤⼩，30⾏，100列，设置控制台窗⼝的名字。 
//控制台窗口设置
system("mode con cols=100 lines=35");
system("title 贪吃蛇");

4.3  控制台屏幕上的坐标COORD

COORD 是Windows API中定义的⼀种结构，表⽰⼀个字符在控制台屏幕上的坐标 

typedef struct _COORD {
SHORT X;
SHORT Y;
} COORD, *PCOORD;

4.4  GetStdHandle

GetStdHandle是⼀个Windows API函数。它⽤于从⼀个特定的标准设备（标准输⼊、标准输出或标准错误）中取得⼀个句柄（⽤来标识不同设备的数值），使⽤这个句柄可以操作设备。
  

HANDLE hOutput = NULL;
//获取标准输出的句柄(⽤来标识不同设备的数值)
hOutput = GetStdHandle(STD_OUTPUT_HANDLE);

4.5 GetConsoleCursorInfo

检索有关指定控制台屏幕缓冲区的光标⼤⼩和可⻅性的信息
  

HANDLE hOutput = NULL;
//获取标准输出的句柄(⽤来标识不同设备的数值)
hOutput = GetStdHandle(STD_OUTPUT_HANDLE);
CONSOLE_CURSOR_INFO CursorInfo;
GetConsoleCursorInfo(hOutput, &CursorInfo);//获取控制台光标信息

4.5.1  CONSOLE_CURSOR_INFO

这个结构体，包含有关控制台游标的信息 

typedef struct _CONSOLE_CURSOR_INFO {
DWORD dwSize;
BOOL bVisible;
} CONSOLE_CURSOR_INFO, *PCONSOLE_CURSOR_INFO;

（1）
dwSize，由光标填充的字符单元格的百分⽐。 此值介于1到100之间。 光标外观会变化，范围从完全填充单元格到单元底部的⽔平线条。
（2） 
bVisible，游标的可⻅性。 如果光标可⻅，则此成员为 TRUE。 
CursorInfo.bVisible = false; //隐藏控制台光标

5.6  SetConsoleCursorInfo

设置指定控制台屏幕缓冲区的光标的⼤⼩和可⻅性。 

HANDLE hOutput = GetStdHandle(STD_OUTPUT_HANDLE);
//影藏光标操作
CONSOLE_CURSOR_INFO CursorInfo;
GetConsoleCursorInfo(hOutput, &CursorInfo);//获取控制台光标信息
CursorInfo.bVisible = false; //隐藏控制台光标
SetConsoleCursorInfo(hOutput, &CursorInfo);//设置控制台光标状态

5.7  SetConsoleCursorPosition

设置指定控制台屏幕缓冲区中的光标位置，我们将想要设置的坐标信息放在COORD类型的pos中，调 ⽤SetConsoleCursorPosition函数将光标位置设置到指定的位置。 
COORD pos = { 10, 5};
HANDLE hOutput = NULL;
//获取标准输出的句柄(⽤来标识不同设备的数值)
hOutput = GetStdHandle(STD_OUTPUT_HANDLE);
//设置标准输出上光标的位置为pos
SetConsoleCursorPosition(hOutput, pos);

温馨提示：

这里我们可以将SetPos：封装⼀个设置光标位置的函数 

//设置光标的坐标
void SetPos(short x, short y)
{
COORD pos = { x, y };
HANDLE hOutput = NULL;
//获取标准输出的句柄(⽤来标识不同设备的数值)
hOutput = GetStdHandle(STD_OUTPUT_HANDLE);
//设置标准输出上光标的位置为pos
SetConsoleCursorPosition(hOutput, pos);
}

5.8 GetAsyncKeyState

获取按键情况，将键盘上每个键的虚拟键值传递给函数，函数通过返回值来分辨按键的状态。
返回值是short类型，在上⼀次调⽤ GetAsyncKeyState
函数后，如果 返回的16位的short数据中，最⾼位是1，说明按键的状态是按下，如果最⾼是0，说明按键的状态是抬起；如果最低位被置为1则说明，该按键被按过，否则为0。
如果我们要判断⼀个键是否被按过，可以检测GetAsyncKeyState返回值的最低值是否为1.
我们这里定义一个宏： 
 #define KEY_PRESS(VK) ( (GetAsyncKeyState(VK) & 0x1) ? 1 : 0 )

5.9 宽字符打印

在游戏地图上，我们打印墙体使⽤宽字符：□，打印蛇使⽤宽字符●，打印⻝物使⽤宽字符■
普通的字符是占⼀个字节的，这类宽字符是俩个字节。

5.9.1  setlocale函数 

char* setlocale (int category, const char* locale);

setlocale 函数⽤于修改当前地区，可以针对⼀个类项修改，也可以针对所有类项。 setlocale 的第⼀个参数如果是LC_ALL，就会影响所有的类项。

C标准给第⼆个参数仅定义了2种可能取值："C"和"  "。
在任意程序执⾏开始，都会隐藏式执⾏调⽤: 
 setlocale(LC_ALL, "C");

当地区设置为"C"时，库函数按正常⽅式执⾏.

当地区设置为"  "时，这种模式下程序会适应本地环境。⽐如：切换到我们的本地模式后就⽀
持宽字符（汉字）的输出等。 
setlocale(LC_ALL, " ");//切换到本地环境

宽字符的打印如下：

#include <stdio.h>
#include<locale.h>
int main() {
setlocale(LC_ALL, "");
wchar_t ch1 = L'●';
wprintf(L"%cn", ch1);
return 0;
}

五、游戏实现

5.1 游戏逻辑主体

#define _CRT_SECURE_NO_WARNINGS
#include"snake.h"
#include<locale.h>
#include<stdio.h>
int main()
{
	char ch;
	setlocale(LC_ALL, "");//切换到本地环境,支持宽字符
	srand((unsigned int)time(NULL));
	do
	{
		Snake snake = { 0 };
		GameInit(&snake);
		GameRun(&snake);
		GameOver(&snake);
		printf("小垃圾还要再来吗？是：Y,否：Nn");
	    ch = getchar();
		getchar();

	} while (ch == 'y' || ch == 'Y');
	return 0;
}

5.2  游戏初始化实现

#define _CRT_SECURE_NO_WARNINGS
#include"snake.h"

#define  WALL  L'□'
#define  BODY  L'●'
#define  FOOD  L'█'
void SetPos(short x, short y)
{
	COORD pos = { x, y };
	HANDLE hOutput = NULL;
	//获取标准输出的句柄(⽤来标识不同设备的数值)
	hOutput = GetStdHandle(STD_OUTPUT_HANDLE);
	//设置标准输出上光标的位置为pos
	SetConsoleCursorPosition(hOutput, pos);
}
void  WelcomeToGame()
{
	SetPos(40, 13);
	printf("欢迎来到贪吃蛇小游戏");
		SetPos(42, 22);
		system("pause");//会显示按任意键继续的信息，按任意键后继续执行下一步
		system("cls");
		SetPos(25, 12);
		printf("↑ . ↓ . ← . → 分别控制蛇的移动， F3为加速，F4为减速n");
		SetPos(42, 22);
		system("pause");//会显示按任意键继续的信息，按任意键后继续执行下一步
		system("cls");
		/*getchar();*/

}
void CreateMap()
{
	SetPos(0,0);
	int i = 0;
	for(i=0;i<58;i=i+2)
	{
		wprintf(L"%c", WALL);
	}
	SetPos(0, 26);
	for (i = 0; i < 58; i = i + 2)
	{
		wprintf(L"%c", WALL);
	}
	for (i = 1; i <26; i++)
	{
		SetPos(0, i);
		wprintf(L"%c", WALL);
	}
	for (i = 1; i < 26; i++)
	{
		SetPos(56, i);
		wprintf(L"%c", WALL);
	}
	/*getchar();*/
}

void InitSnake(Snake* snake)
{
	//初始化蛇身
	
	for (int i = 0; i < 5; i++)
	{
		SnakeNode* node = (SnakeNode*)malloc(sizeof(SnakeNode));
		node->x = 24 + 2 * i;
		node->y = 15;
		node->next = NULL;
		if (snake->pSnake== NULL)
		{
			snake->pSnake= node;
			

		}
		else
		{
			node->next = snake->pSnake;
			snake->pSnake = node;
		}
	}
	SnakeNode* cur = snake->pSnake;
	while (cur)
	{
		int x = cur->x;
		int y = cur->y;
		SetPos(x, y);
		wprintf(L"%c", BODY);
		cur = cur->next;
	}
	snake->status = RUN;
	snake->dir = RIGHT;
	snake->FoodWeight = 10;
	snake->pFood = NULL;
	snake->score = 0;
	snake->SleepTime = 200;
}
void CreateFood(Snake* snake)
{
	int x = 0;
	int y = 0;

again:
	do
	{
		 x = rand() % 53 + 2;
		 y = rand() % 24 + 1;
	} while (x % 2 != 0);
	 SnakeNode* cur = snake->pSnake;
	
	do
	{
		if (x == cur->x && y == cur->y)
		{
			goto again;
		}
		cur = cur->next;
	} while (cur);
	SnakeNode* food = (SnakeNode*)malloc(sizeof(SnakeNode));
	food->x = x;
	food->y = y;
	
	snake->pFood = food;
	
	SetPos(x, y);
	wprintf(L"%c", FOOD);
	/*getchar();*/

}

void  GameInit(Snake* snake)
{
	//控制台窗口设置
	system("mode con cols=100 lines=35");
	system("title 贪吃蛇");
	//隐藏光标
	 HANDLE hOutput = GetStdHandle(STD_OUTPUT_HANDLE);
     CONSOLE_CURSOR_INFO CursorInfo;
	GetConsoleCursorInfo(hOutput, &CursorInfo);//获取控制台光标信息
	CursorInfo.bVisible = false; //隐藏控制台光标
	SetConsoleCursorInfo(hOutput, &CursorInfo);//设置控制台光标状态
	//打印欢迎界面
	WelcomeToGame();
	//创建地图
	 CreateMap();
	//初始化贪吃蛇
     InitSnake(snake);
	//创建食物
      CreateFood(snake);
}

5.3 游戏运行实现

void PrintHelpInfo()
{
	SetPos(60, 13);
	printf("1. 不能穿墙不能咬到自己n");
	SetPos(60, 14);
	printf("2.↑.↓.←.→分别控制蛇的移动n");
	SetPos(60, 15);
    printf("3. F3为加速，F4为减速n");
	SetPos(60, 16);
	printf("4. ESC-退出，空格-暂停n");
}

void Pause()
{
	while (1)
	{
		Sleep(200);
		if (KEY_PRESS(VK_SPACE) == 1)
		{
			break;
		}
	}
	
}
void EatFood(Snake* snake, SnakeNode* snakenext)
{
	snakenext->next = snake->pSnake;
	snake->pSnake = snakenext;
	SnakeNode* cur = snake->pSnake;
	while (cur)
	{
		SetPos(cur->x, cur->y);
		wprintf(L"%lc", BODY);
		cur = cur->next;
	}
	free(snake->pFood);
	snake->pFood = NULL;
	CreateFood(snake);

}
void NoEatFood(Snake* snake, SnakeNode* snakenext)
{
	snakenext->next = snake->pSnake;
	snake->pSnake = snakenext;
	SnakeNode* cur = snake->pSnake;
	while (cur->next->next)
	{
		SetPos(cur->x, cur->y);
		wprintf(L"%lc", BODY);
		cur = cur->next;
	}
	SetPos(cur->x, cur->y);
	wprintf(L"%lc", BODY);
	SetPos(cur->next->x, cur->next->y);
	printf("  ");
	free(cur->next);
	cur->next = NULL;
}

void SnakeMove(Snake* snake)
{
	SnakeNode* snakenext = (SnakeNode*)malloc(sizeof(SnakeNode));
	if (snake->dir == UP)
	{
		snakenext->x = snake->pSnake->x;
		snakenext->y = snake->pSnake->y -1;
		snakenext->next = NULL;
	}
	else if (snake->dir == DOWN)
	{
		snakenext->x = snake->pSnake->x;
		snakenext->y = snake->pSnake->y +1;
		snakenext->next = NULL;
	}
	if (snake->dir == LEFT)
	{
		snakenext->x = snake->pSnake->x-2;
		snakenext->y = snake->pSnake->y ;
		snakenext->next = NULL;
	}
	if (snake->dir == RIGHT)
	{
		snakenext->x = snake->pSnake->x + 2;
		snakenext->y = snake->pSnake->y;
		snakenext->next = NULL;
	}
	//判断下一个节点是否为食物
	if (snakenext->x == snake->pFood->x && snakenext->y == snake->pFood->y)
	{
		EatFood(snake,snakenext);//吃食物
		snake->score += snake->FoodWeight;
	}
	else
	{
		NoEatFood(snake,snakenext);//不吃食物
	}
	//碰撞检测
	if (snake->pSnake->x == 0 || snake->pSnake->x == 56 || snake->pSnake->y == 0 || snake->pSnake->y == 26)
	{
		snake->status = KILL_BY_WALL;
	}
	SnakeNode* cur = snake->pSnake->next;
	while (cur)
	{
		if (cur->x == snake->pSnake->x && cur->y == snake->pSnake->y)
		{
			snake->status = KILL_BY_SELF;
		}
		cur = cur->next;
	}
}

void GameRun(Snake* snake)
{
	//打印帮助信息
	PrintHelpInfo();
	do
	{
		SetPos(60, 8);
		printf("游戏总得分：%5d ", snake->score);
		SetPos(60, 9);
		printf("每个食物的分数：%2d ", snake->FoodWeight);
		if (KEY_PRESS(VK_UP) == 1&&snake->dir!=DOWN)
		{
			snake->dir = UP;
		}
		else if (KEY_PRESS(VK_DOWN) == 1 && snake->dir != UP)
		{
			snake->dir = DOWN;
		}
		else if (KEY_PRESS(VK_RIGHT) == 1 && snake->dir != LEFT)
		{
			snake->dir = RIGHT;
		}
		else if (KEY_PRESS(VK_LEFT) == 1 && snake->dir != RIGHT)
		{
			snake->dir =LEFT;
		}
		else if (KEY_PRESS(VK_F3) == 1)
		{
			if (snake->SleepTime>=80)
			{
				snake->SleepTime -= 30;
				snake->FoodWeight += 2;
			}
		}
		else if (KEY_PRESS(VK_F4) == 1)
		{
			if (snake->SleepTime<=320)
			{
				snake->SleepTime += 30;
				snake->FoodWeight -= 2;
			}
		}
		else if (KEY_PRESS(VK_ESCAPE) == 1)
		{
			snake->status = OVER;
			break;
		}
		else if (KEY_PRESS(VK_SPACE) == 1)
		{
			Pause();
		}
		
		SnakeMove(snake);
		Sleep(snake->SleepTime);//每一帧停0.2s
	} while (snake->status==RUN);
}

5.4 游戏结束实现

void GameOver(Snake* snake)
{
	switch (snake->status)
	{
	case KILL_BY_WALL:
		SetPos(20, 15);
		printf("你已经撞墙了，小垃圾！n");
			break;
	case KILL_BY_SELF:
		SetPos(20, 15);
		printf("你已经自杀了，小垃圾！n");
             break;
	case  OVER:
		SetPos(20, 15);
		printf("你退出游戏了，小垃圾！n");
              break;
	}
	SetPos(0, 29);

}

六、 完整代码

6.1 snake.h

#define _CRT_SECURE_NO_WARNINGS
#include<stdbool.h>
#include<stdio.h>
#include<windows.h>
#include<stdlib.h>
#include<time.h>
#define KEY_PRESS(VK) ( (GetAsyncKeyState(VK) & 0x1) ? 1 : 0 )
enum direction{UP = 1,  DOWN, LEFT, RIGHT};//蛇的方向
enum game_status{RUN,KILL_BY_WALL,KILL_BY_SELF,OVER};

typedef struct  SnakeNode
{
	int x;
	int y;
	struct SnakeNode* next;
}SnakeNode;


typedef struct Snake
{
	SnakeNode* pSnake;//指向贪吃蛇头节点
	SnakeNode* pFood;//指向食物的节点
	int  score;
	int FoodWeight;
	int SleepTime;
	enum direction dir;//蛇的方向
	enum  game_status status;//游戏状态
}Snake;
void  GameInit(Snake*snake);
void  WelcomeToGame();
void CreateMap();
void InitSnake(Snake* snake);
void CreateFood(Snake* snake);
void GameRun(Snake* snake);
void PrintHelpInfo();
void Pause();
void SnakeMove(Snake* snake);

void EatFood(Snake* snake,SnakeNode*snakenext);
void NoEatFood(Snake* snake, SnakeNode* snakenext);
void GameOver(Snake* snake);

6.2 snake.c

#define _CRT_SECURE_NO_WARNINGS
#include"snake.h"

#define  WALL  L'□'
#define  BODY  L'●'
#define  FOOD  L'█'
void SetPos(short x, short y)
{
	COORD pos = { x, y };
	HANDLE hOutput = NULL;
	//获取标准输出的句柄(⽤来标识不同设备的数值)
	hOutput = GetStdHandle(STD_OUTPUT_HANDLE);
	//设置标准输出上光标的位置为pos
	SetConsoleCursorPosition(hOutput, pos);
}
void  WelcomeToGame()
{
	SetPos(40, 13);
	printf("欢迎来到贪吃蛇小游戏");
		SetPos(42, 22);
		system("pause");//会显示按任意键继续的信息，按任意键后继续执行下一步
		system("cls");
		SetPos(25, 12);
		printf("↑ . ↓ . ← . → 分别控制蛇的移动， F3为加速，F4为减速n");
		SetPos(42, 22);
		system("pause");//会显示按任意键继续的信息，按任意键后继续执行下一步
		system("cls");
		/*getchar();*/

}
void CreateMap()
{
	SetPos(0,0);
	int i = 0;
	for(i=0;i<58;i=i+2)
	{
		wprintf(L"%c", WALL);
	}
	SetPos(0, 26);
	for (i = 0; i < 58; i = i + 2)
	{
		wprintf(L"%c", WALL);
	}
	for (i = 1; i <26; i++)
	{
		SetPos(0, i);
		wprintf(L"%c", WALL);
	}
	for (i = 1; i < 26; i++)
	{
		SetPos(56, i);
		wprintf(L"%c", WALL);
	}
	/*getchar();*/
}

void InitSnake(Snake* snake)
{
	//初始化蛇身
	
	for (int i = 0; i < 5; i++)
	{
		SnakeNode* node = (SnakeNode*)malloc(sizeof(SnakeNode));
		node->x = 24 + 2 * i;
		node->y = 15;
		node->next = NULL;
		if (snake->pSnake== NULL)
		{
			snake->pSnake= node;
			

		}
		else
		{
			node->next = snake->pSnake;
			snake->pSnake = node;
		}
	}
	SnakeNode* cur = snake->pSnake;
	while (cur)
	{
		int x = cur->x;
		int y = cur->y;
		SetPos(x, y);
		wprintf(L"%c", BODY);
		cur = cur->next;
	}
	snake->status = RUN;
	snake->dir = RIGHT;
	snake->FoodWeight = 10;
	snake->pFood = NULL;
	snake->score = 0;
	snake->SleepTime = 200;
}
void CreateFood(Snake* snake)
{
	int x = 0;
	int y = 0;

again:
	do
	{
		 x = rand() % 53 + 2;
		 y = rand() % 24 + 1;
	} while (x % 2 != 0);
	 SnakeNode* cur = snake->pSnake;
	
	do
	{
		if (x == cur->x && y == cur->y)
		{
			goto again;
		}
		cur = cur->next;
	} while (cur);
	SnakeNode* food = (SnakeNode*)malloc(sizeof(SnakeNode));
	food->x = x;
	food->y = y;
	
	snake->pFood = food;
	
	SetPos(x, y);
	wprintf(L"%c", FOOD);
	/*getchar();*/

}

void  GameInit(Snake* snake)
{
	//控制台窗口设置
	system("mode con cols=100 lines=35");
	system("title 贪吃蛇");
	//隐藏光标
	 HANDLE hOutput = GetStdHandle(STD_OUTPUT_HANDLE);
     CONSOLE_CURSOR_INFO CursorInfo;
	GetConsoleCursorInfo(hOutput, &CursorInfo);//获取控制台光标信息
	CursorInfo.bVisible = false; //隐藏控制台光标
	SetConsoleCursorInfo(hOutput, &CursorInfo);//设置控制台光标状态
	//打印欢迎界面
	WelcomeToGame();
	//创建地图
	 CreateMap();
	//初始化贪吃蛇
     InitSnake(snake);
	//创建食物
      CreateFood(snake);
}

void PrintHelpInfo()
{
	SetPos(60, 13);
	printf("1. 不能穿墙不能咬到自己n");
	SetPos(60, 14);
	printf("2.↑.↓.←.→分别控制蛇的移动n");
	SetPos(60, 15);
    printf("3. F3为加速，F4为减速n");
	SetPos(60, 16);
	printf("4. ESC-退出，空格-暂停n");
}

void Pause()
{
	while (1)
	{
		Sleep(200);
		if (KEY_PRESS(VK_SPACE) == 1)
		{
			break;
		}
	}
	
}
void EatFood(Snake* snake, SnakeNode* snakenext)
{
	snakenext->next = snake->pSnake;
	snake->pSnake = snakenext;
	SnakeNode* cur = snake->pSnake;
	while (cur)
	{
		SetPos(cur->x, cur->y);
		wprintf(L"%lc", BODY);
		cur = cur->next;
	}
	free(snake->pFood);
	snake->pFood = NULL;
	CreateFood(snake);

}
void NoEatFood(Snake* snake, SnakeNode* snakenext)
{
	snakenext->next = snake->pSnake;
	snake->pSnake = snakenext;
	SnakeNode* cur = snake->pSnake;
	while (cur->next->next)
	{
		SetPos(cur->x, cur->y);
		wprintf(L"%lc", BODY);
		cur = cur->next;
	}
	SetPos(cur->x, cur->y);
	wprintf(L"%lc", BODY);
	SetPos(cur->next->x, cur->next->y);
	printf("  ");
	free(cur->next);
	cur->next = NULL;
}

void SnakeMove(Snake* snake)
{
	SnakeNode* snakenext = (SnakeNode*)malloc(sizeof(SnakeNode));
	if (snake->dir == UP)
	{
		snakenext->x = snake->pSnake->x;
		snakenext->y = snake->pSnake->y -1;
		snakenext->next = NULL;
	}
	else if (snake->dir == DOWN)
	{
		snakenext->x = snake->pSnake->x;
		snakenext->y = snake->pSnake->y +1;
		snakenext->next = NULL;
	}
	if (snake->dir == LEFT)
	{
		snakenext->x = snake->pSnake->x-2;
		snakenext->y = snake->pSnake->y ;
		snakenext->next = NULL;
	}
	if (snake->dir == RIGHT)
	{
		snakenext->x = snake->pSnake->x + 2;
		snakenext->y = snake->pSnake->y;
		snakenext->next = NULL;
	}
	//判断下一个节点是否为食物
	if (snakenext->x == snake->pFood->x && snakenext->y == snake->pFood->y)
	{
		EatFood(snake,snakenext);//吃食物
		snake->score += snake->FoodWeight;
	}
	else
	{
		NoEatFood(snake,snakenext);//不吃食物
	}
	//碰撞检测
	if (snake->pSnake->x == 0 || snake->pSnake->x == 56 || snake->pSnake->y == 0 || snake->pSnake->y == 26)
	{
		snake->status = KILL_BY_WALL;
	}
	SnakeNode* cur = snake->pSnake->next;
	while (cur)
	{
		if (cur->x == snake->pSnake->x && cur->y == snake->pSnake->y)
		{
			snake->status = KILL_BY_SELF;
		}
		cur = cur->next;
	}
}

void GameRun(Snake* snake)
{
	//打印帮助信息
	PrintHelpInfo();
	do
	{
		SetPos(60, 8);
		printf("游戏总得分：%5d ", snake->score);
		SetPos(60, 9);
		printf("每个食物的分数：%2d ", snake->FoodWeight);
		if (KEY_PRESS(VK_UP) == 1&&snake->dir!=DOWN)
		{
			snake->dir = UP;
		}
		else if (KEY_PRESS(VK_DOWN) == 1 && snake->dir != UP)
		{
			snake->dir = DOWN;
		}
		else if (KEY_PRESS(VK_RIGHT) == 1 && snake->dir != LEFT)
		{
			snake->dir = RIGHT;
		}
		else if (KEY_PRESS(VK_LEFT) == 1 && snake->dir != RIGHT)
		{
			snake->dir =LEFT;
		}
		else if (KEY_PRESS(VK_F3) == 1)
		{
			if (snake->SleepTime>=80)
			{
				snake->SleepTime -= 30;
				snake->FoodWeight += 2;
			}
		}
		else if (KEY_PRESS(VK_F4) == 1)
		{
			if (snake->SleepTime<=320)
			{
				snake->SleepTime += 30;
				snake->FoodWeight -= 2;
			}
		}
		else if (KEY_PRESS(VK_ESCAPE) == 1)
		{
			snake->status = OVER;
			break;
		}
		else if (KEY_PRESS(VK_SPACE) == 1)
		{
			Pause();
		}
		
		SnakeMove(snake);
		Sleep(snake->SleepTime);//每一帧停0.2s
	} while (snake->status==RUN);
}

void GameOver(Snake* snake)
{
	switch (snake->status)
	{
	case KILL_BY_WALL:
		SetPos(20, 15);
		printf("你已经撞墙了，小垃圾！n");
			break;
	case KILL_BY_SELF:
		SetPos(20, 15);
		printf("你已经自杀了，小垃圾！n");
             break;
	case  OVER:
		SetPos(20, 15);
		printf("你退出游戏了，小垃圾！n");
              break;
	}
	SetPos(0, 29);

}

6.3 text.c

#define _CRT_SECURE_NO_WARNINGS
#include"snake.h"
#include<locale.h>
#include<stdio.h>
int main()
{
	char ch;
	setlocale(LC_ALL, "");//切换到本地环境,支持宽字符
	srand((unsigned int)time(NULL));
	do
	{
		Snake snake = { 0 };
		GameInit(&snake);
		GameRun(&snake);
		GameOver(&snake);
		printf("小垃圾还要再来吗？是：Y,否：Nn");
	    ch = getchar();
		getchar();

	} while (ch == 'y' || ch == 'Y');
	return 0;
}

七、穿墙版（进阶版）

穿墙也非常简单，只是将撞墙检测去除，改为

1）判断snakenext->y ==0，则snakenext->y =25

2）判断snakenext->y ==26，则snakenext->y =1

3）判断snakenext->x==0，则snakenext->x =54

4)   判断snakenext->x==56，则snakenext->x =2

其余状态为正常吃食物状态

只在snake.c中的void SnakeMove(Snake* snake)中略有改动，其余不变

void SnakeMove(Snake* snake)
{
	SnakeNode* snakenext = (SnakeNode*)malloc(sizeof(SnakeNode));
	if (snake->dir == UP)
	{
		
		snakenext->x = snake->pSnake->x;
		snakenext->y = snake->pSnake->y -1;
		snakenext->next = NULL;
	}
	else if (snake->dir == DOWN)
	{
		snakenext->x = snake->pSnake->x;
		snakenext->y = snake->pSnake->y +1;
		snakenext->next = NULL;
	}
	if (snake->dir == LEFT)
	{
		snakenext->x = snake->pSnake->x-2;
		snakenext->y = snake->pSnake->y ;
		snakenext->next = NULL;
	}
	if (snake->dir == RIGHT)
	{
		snakenext->x = snake->pSnake->x + 2;
		snakenext->y = snake->pSnake->y;
		snakenext->next = NULL;
	}
	//判断下一个节点是否为食物
	if (snakenext->x == snake->pFood->x && snakenext->y == snake->pFood->y)
	{
		EatFood(snake,snakenext);//吃食物
		snake->score += snake->FoodWeight;
	}
	else
	{ 
		
		if (snakenext->y == 0)
		{
			snakenext->y = 25;
			snakenext->next = snake->pSnake;
			snake->pSnake = snakenext;
			SnakeNode* cur = snake->pSnake;
			while (cur->next->next)
			{
				SetPos(cur->x, cur->y);
				wprintf(L"%lc", BODY);
				cur = cur->next;
			}
			SetPos(cur->x, cur->y);
			wprintf(L"%lc", BODY);
			SetPos(cur->next->x, cur->next->y);
			printf("  ");
			free(cur->next);
			cur->next = NULL;
		}
		else if (snakenext->y == 26)
		{
			snakenext->y =1;
			snakenext->next = snake->pSnake;
			snake->pSnake = snakenext;
			SnakeNode* cur = snake->pSnake;
			while (cur->next->next)
			{
				SetPos(cur->x, cur->y);
				wprintf(L"%lc", BODY);
				cur = cur->next;
			}
			SetPos(cur->x, cur->y);
			wprintf(L"%lc", BODY);
			SetPos(cur->next->x, cur->next->y);
			printf("  ");
			free(cur->next);
			cur->next = NULL;
		}
		else if (snakenext->x == 0)
		{
			snakenext->x = 54;
			snakenext->next = snake->pSnake;
			snake->pSnake = snakenext;
			SnakeNode* cur = snake->pSnake;
			while (cur->next->next)
			{
				SetPos(cur->x, cur->y);
				wprintf(L"%lc", BODY);
				cur = cur->next;
			}
			SetPos(cur->x, cur->y);
			wprintf(L"%lc", BODY);
			SetPos(cur->next->x, cur->next->y);
			printf("  ");
			free(cur->next);
			cur->next = NULL;
		}
		else if (snakenext->x == 56)
		{
			snakenext->x =2;
			snakenext->next = snake->pSnake;
			snake->pSnake = snakenext;
			SnakeNode* cur = snake->pSnake;
			while (cur->next->next)
			{
				SetPos(cur->x, cur->y);
				wprintf(L"%lc", BODY);
				cur = cur->next;
			}
			SetPos(cur->x, cur->y);
			wprintf(L"%lc", BODY);
			SetPos(cur->next->x, cur->next->y);
			printf("  ");
			free(cur->next);
			cur->next = NULL;
		}
		else
		{
			NoEatFood(snake, snakenext);//不吃食物
		}
	}
	//穿墙检测
	
	SnakeNode* cur = snake->pSnake->next;
	while (cur)
	{
		if (cur->x == snake->pSnake->x && cur->y == snake->pSnake->y)
		{
			snake->status = KILL_BY_SELF;
		}
		cur = cur->next;
	}
}

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