闲话不多说，直接上代码

#include "stdio.h"
#include "windows.h"
#include "stdbool.h"


/*坐标系 
------------->   y
|
|
|
|
|x 

*/
/*
按键：移动： 		8 
				4	5	6      
				9：暂停 
*/

#define X 20
#define Y 70

#define WAIT_TIME 700//移动一次需要的时间 

enum
{
	UP,
	DOWN,
	LEFT,
	RIGHT
};

//对食物进行标记 
enum
{
	food1=2,
	food2
};

int Map[X][Y];
int score=0;

typedef struct
{
	int x;
	int y;
}POSE;

typedef struct
{
	POSE pose[X*Y];//蛇最大长度应为(x-2)(y-2),这里为了省事 
	int len;
	int direction;
	bool eatfood;
}SHAKE;

SHAKE Shake;
//制作步骤差不多如下 
void Init();	//2
void map();    //1 
void goxy();   //3
void ShakeGrape();     //4
void move();   //5
void key();    //6
void foods();  //7
int FoodCheck(int x,int y);  //8
int isgameover();  //9
void show();    //10
void read();    //11 

int main(void)
{
	read();
	Init();
	map();
	foods();
	while(1)
	{
		ShakeGrape();
		show();
		Sleep(WAIT_TIME);
		key();
		move();
		if(isgameover())
		{
			system("cls");          //清除屏幕内容
			printf("Game Over\n"); 
			printf("最后得分:%d\n",score); 
            system("pause");
            break;
		}
		if(Map[Shake.pose[0].x][Shake.pose[0].y]==food1)
		{
			Map[Shake.pose[0].x][Shake.pose[0].y]=0;
			Shake.eatfood =true;
			foods();
			score+=1;
		}
		else if(Map[Shake.pose[0].x][Shake.pose[0].y]==food2)
		{
			Map[Shake.pose[0].x][Shake.pose[0].y]=0;
			Shake.eatfood =true;
			foods();
			score+=10;
		}
	}
	return 0;
} 

void Init()  //初始化    
{
	int i;
	srand((unsigned)time(NULL));
	//srand设置随机种子，相同的随机种子对应的rand产生的随机数是相同的 
	//设置随机种子，和时间有关，避免每次都一样，由于不需要种子的数据，直接用空指针NULL获取数据
	goxy(0,0);
	CONSOLE_CURSOR_INFO cursor_info = {1, 0}; //清除光标 
	SetConsoleCursorInfo(GetStdHandle(STD_OUTPUT_HANDLE), &cursor_info);
	Shake.len =4;
	Shake.pose[0].x =X/2;
	Shake.pose[0].y =Y/2; 
	for(i=0;i<Shake.len;i++)
	{
		Shake.pose[i].x =Shake.pose[0].x-i ;
		Shake.pose[i].y =Shake.pose[0].y;
	}
	Shake.direction =DOWN;
}

void map()
{
	int x,y;
	for(x=0;x<X;x++)
	{    //围墙 
		Map[x][0]=1;            
		Map[x][Y-1]=1;

	}
	for(y=0;y<Y;y++)
	{
		Map[0][y]=1;
		Map[X-1][y]=1;		
	}
	/*========================*/ 
	for(x=0;x<X;x++)//给围墙填充图形 
	{
		for(y=0;y<Y;y++)
		{
			if(Map[x][y]==1)
			{
				printf("*");
			}
			else
			{
				printf(" ");
			}
		}
		printf("\n");
	}
}

void goxy(int x,int y)//移动光标到指定位置 
{
    COORD position={y,x};
    SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE),position);
}

void ShakeGrape()   //蛇的身体 
{
	int i;
	for(i=0;i<Shake.len ;i++)
	{
		goxy(Shake.pose[i].x ,Shake.pose[i].y );
		printf("0");
	}
}

void move()
{
	int i=0;
	goxy(Shake.pose[Shake.len -1].x ,Shake.pose[Shake.len -1].y);
	printf(" ");
	for(i=1;i<Shake.len ;i++)
	{
		Shake.pose[Shake.len -i].x =Shake.pose[Shake.len -i-1].x ;
		Shake.pose[Shake.len -i].y =Shake.pose[Shake.len -i-1].y ;
	}
	switch(Shake.direction )
	{
		case UP:
			Shake.pose[0].x --;
			break;
		case DOWN:
			Shake.pose[0].x ++;
			break;
		case LEFT:
			Shake.pose[0].y --;
			break;
		case RIGHT:
			Shake.pose[0].y ++;
			break;
	}
	if(Shake.eatfood )
	{
		Shake.len ++;
		Shake.eatfood =false;
	}
}

void key()
{
	if(kbhit()!=0)//有按键输入值不为0，没有为0 
	{
		char keys;
		while(kbhit()!=0)
		{
			keys=getch();//获取键值 
		}
		switch(keys)
        {
	        case '8':
	            if(Shake.direction !=DOWN)         //防止缩头
	                Shake.direction=UP;
	            break;
	        case '5':
	            if(Shake.direction!=UP)
	                Shake.direction=DOWN;
	            break;
	        case '4':
	            if(Shake.direction!=RIGHT)
	                Shake.direction=LEFT;
	            break;
	        case '6':
	            if(Shake.direction!=LEFT)
	                Shake.direction=RIGHT;
	            break;
	        case '9': 
				goxy(X+2,0);      
	            system("pause");
	            break;
        }
	}
}

void foods()
{
	int x,y;
	int k;
	do
	{
		x=rand()%X;
		y=rand()%Y;
	}while(!FoodCheck(x,y));
	k=rand()%5;
	goxy(x,y);
	if(k==4)//随机食物 
	{
		Map[x][y]=food1;
		printf("$");
	}
	else
	{
		Map[x][y]=food2;
		printf("+");
	}
}

int FoodCheck(int x,int y)//检查食物位置是否合规 
{
	int i=0;
	if(x==0 || x==(X-1) || y==0 || y==(Y-1))//放墙上 
	{
		return 0;
	}
	for(i=0;i<Shake.len ;i++)
	{
		if(Shake.pose[i].x ==x && Shake.pose[i].y==y )//放蛇身上 
		{
			return 0;
		}
	}
	return 1;
}

int isgameover()
{
	int i=0;
	if(Shake.pose[0].x==0 || Shake.pose[0].x==(X-1) || Shake.pose[0].y ==(Y-1) || Shake.pose[0].y==0)//撞墙 
	{
		return 1;
	}
	for(i=2;i<Shake.len ;i++)//咬到蛇身 
	{
		if(Shake.pose[0].x ==Shake.pose[i].x && Shake.pose[0].y ==Shake.pose[i].y)
		{
			return 1;
		}
	}
	return 0;
}

void show()
{
	goxy(X,0);
	printf("得分：%d",score);
}


void read()
{
	printf("	控制键:4 5 6 8\n");
	printf("	暂停键:9\n");
	printf("	+:10分\n");
	printf("	$:1分\n");
	printf("	制作时间:2021-3-21\n");
	printf("	按enter键即可开始\n");
	printf("	\n");
	system("pause");
	system("cls");
}