c语言写的贪吃蛇

# include <stdio.h>
# include <stdlib.h>
# include <string.h>
# include <conio.h>
# include <windows.h>
# include <time.h>
#define MAX 1000
void color(int b);//颜色函数 
void gotoxy(int x, int y);//光标函数
void drawsnake();//蛇的绘画 
void movesnake();//蛇的移动 
void createmap();//创建地图并初始化 
void begingame();//开始游戏
void createfood();//生成食物的函数 
void diagnosesnake();//判断是否吃到食物 
void changesnake();//蛇的移动，按键的 
void  bitself();//不能咬到自己 
void cantcrosswall();//不能穿墙 
void endgame();//函数结束 
struct COOD
{
	int x;
	int y;	
};
enum CH
{
	up=72,
	down=80,
	left=75,
	right=77
};
struct SNAKE
{
	int n;
	struct COOD a[MAX];
	enum CH ch;
}snake;

void color(int b)//颜色函数 
{
    HANDLE hConsole = GetStdHandle((STD_OUTPUT_HANDLE)) ; 
    SetConsoleTextAttribute(hConsole,b) ;
} 
void gotoxy(int x, int y)//光标函数 
{
    COORD coord = {x, y};
    SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), coord);
}
void drawsnake()//蛇的绘画 
{
	int i;
    for(i=0;i<snake.n;i++)//生成蛇身 
	{
    gotoxy(snake.a[i].x,snake.a[i].y);
    color(12);
    printf("o");
	}
	gotoxy(70,16);
	printf("你的分数为%d",snake.n-1);
}
void movesnake()//蛇的移动 
{
	int i;
	gotoxy(snake.a[0].x,snake.a[0].y);
    printf(" ");
    for(i=0;i<snake.n-1;i++){
    	snake.a[i].x=snake.a[i+1].x;
    	snake.a[i].y=snake.a[i+1].y;
	} 
    changesnake(); 
	switch(snake.ch)
	{
		case up:
			snake.a[i].y=snake.a[i-1].y-1;
			snake.a[i].x=snake.a[i-1].x;
			break;
	    case down:
	    	snake.a[i].y=snake.a[i-1].y+1;
	    	snake.a[i].x=snake.a[i-1].x;
			break;
		case left:
			snake.a[i].x=snake.a[i-1].x-1;
			snake.a[i].y=snake.a[i-1].y;
			break;
	    case right:
	    	snake.a[i].x=snake.a[i-1].x+1;
	    	snake.a[i].y=snake.a[i-1].y;
			break;
		default :
			break;
	}
    diagnosesnake();//判断是否吃到食物 
    cantcrosswall();
    bitself(); 
}
void createmap()//创建地图 
{
    int i;
    for(i=0;i<58;i+=2)//打印上下边框
    {   
	    color(12);
        gotoxy(i,0);
        printf("*");
        color(12);
        gotoxy(i,26);
        printf("*");
    }
    for(i=1;i<26;i++)//打印左右边框 
	{ 
	color(12);
	gotoxy(0,i); 
	printf("*"); 
	color(12);
	gotoxy(56,i); 
	printf("*");
	 } 
	snake.n=2;
	snake.a [0].x=11;
	snake.a [0].y=11;
	snake.a [1].x=12;
	snake.a [1].y=11;
	snake.ch=down;
	snake.a [2].x=16;
	snake.a [2].y=16;//初始化
}
void begingame()
{
	int a=200;
	createmap(); 
	gotoxy(snake.a[snake.n].x,snake.a[snake.n].y);
    color(10);
    printf("o");
    while(1){
    	if(snake.n>5)
		{
    		a=100;
    		gotoxy(70,15);
    		printf("加速啦"); 
		}
    Sleep(a);
    drawsnake()	;
    movesnake();  
	};
}
void createfood()//生成食物的函数 
{
	int i;
    srand((int)time(0));
    snake.a[snake.n].x =rand()%40+1;
    snake.a[snake.n].y =rand()%25+1;
    
    for(i=0;i<snake.n;i++)
	{
    	if((snake.a[snake.n].x==snake.a[i].x )&&(snake.a[snake.n].y ==snake.a[i].y))
		{
    		i=0;
    		snake.a[snake.n].x =rand()%40+1;
            snake.a[snake.n].y =rand()%25+1;
		}
	}
	gotoxy(snake.a[snake.n].x,snake.a[snake.n].y);
    color(10);
    printf("o");
}
void changesnake()//蛇的移动，按键的 
{    
	if(GetAsyncKeyState(VK_UP) && snake.ch!=down)
        {
            snake.ch=up;
        }
        else if(GetAsyncKeyState(VK_DOWN) && snake.ch!=up)
        {
            snake.ch=down;
        }
        else if(GetAsyncKeyState(VK_LEFT)&& snake.ch!=right)
        {
            snake.ch=left;
        }
        else if(GetAsyncKeyState(VK_RIGHT)&& snake.ch!=left)
        {
            snake.ch=right;
        }

} 
void diagnosesnake()//判断是否吃到食物 
{
   if((snake.a[snake.n].x==snake.a[snake.n-1].x)&&(snake.a[snake.n].y==snake.a[snake.n-1].y))
   {
     snake.n+=1;
   createfood();
   }
}
void cantcrosswall()
{
   if((snake.a[snake.n-1].x==0||snake.a[snake.n-1].x==56)||(snake.a[snake.n-1].y==0||snake.a[snake.n-1].y==26))
   endgame();
}
void endgame()
{
	system("cls");
	color(5);
	gotoxy(25,25);
	printf("Game Over!");
	system("pause");
}
void  bitself()
{   
    int i;
	for(i=0;i<snake.n-2;i++)
	{
		if(snake.a[snake.n-1].x==snake.a[i].x&&snake.a[snake.n-1].y==snake.a[i].y)
		{
			endgame();
		}
		
	}
	
}
int main(void)//主函数 
{    
    gotoxy(25,13);
	printf("Welcome to 贪吃蛇");
	gotoxy(25,15);
	printf("这是一个好玩的游戏");
	Sleep(2000);
	system("cls"); 
	begingame();
	return 0;
}