#include<iostream>
#include<windows.h>
#include<conio.h>
#include<time.h>
#include <windows.h>
using namespace std;
char direction_a,direction_b;			//方向a、b,用于方向的限制 
int scores,num,fool_x,fool_y,speed=100;	//得分、num用于蛇身起步、食物x坐标、食物y坐标 
bool end;								//结束标记 
struct node 							//蛇身结点 
{
	int x,y;
	node *next;
}*head=NULL,*p,*tail;
 
void init();							//初始化开始界面 
void start();							//游戏开始入场 
void init_snake();						//初始化蛇身 
void delete_snake();					//删除蛇身 
void control();							//方向控制 
void move();							//蛇身移动 
void limit();							//方向限制
void panduan();							//配合limit限制方向 
void fool();							//食物的出现以及食物被吞
void isEnd();							//结束判断 
void zhuangwei();						//撞尾判断 
void zhuangqiang();						//撞墙判断 
void gotoxy(int x,int y) 
{
	COORD pos;
	pos.X = x - 1;
	pos.Y = y - 1;
	SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE),pos);
}
 
int main ()
{
	srand((unsigned)time(NULL));
	init();
	cin>>direction_a;
	if(direction_a!='y'&&direction_a!='Y')
		return 0;
	do
	{
		system("cls");					//清除屏幕 
		end=false;
		start();
		delete_snake();
		init_snake();
		scores=0;
		num=0;
		fool_x=(rand() % (79-2+1))+ 2;
		fool_y=(rand() % (22-2+1))+ 2;
		gotoxy(fool_x,fool_y); 
		cout<<"0";
		direction_a=getch();
		while(direction_a!='d'&&direction_a!='s'&&direction_a!='w') direction_a=getch();
		while(true)
		{
			if(num&&direction_a!='d'&&direction_a!='s'&&direction_a!='w'&&direction_a!='a')
			{
				direction_a=direction_b;
			}
			control();
			fool();
			Sleep(speed);
			if(kbhit())					//kbhit 非阻塞函数 
			{
				direction_a=getch();	//使用 getch 函数获取键盘输入 
				limit();
			}
			panduan();
			num=1;
			zhuangqiang();
			zhuangwei();
			if(end) break;
		}
	}while(direction_a=='y'||direction_a=='Y'); 
	return 0;
}
void init()							
{
	gotoxy(35,8);
	cout<<"★贪  吃  蛇★";
	gotoxy(36,10);
	cout<<"开始请输入y:";
}
void start()						
{
	for(int i=0;i<=79;i++)
		{
			Sleep(10);
			cout<<"*";
			gotoxy(i+1,24);
			cout<<"*";
			gotoxy(i+2,1);
		}	
		gotoxy(1,2);
		for(int i=0;i<=21;i++)
		{
			Sleep(20);
			cout<<"*";
			for(int j=0;j<=77;j++)	cout<<" ";
			cout<<"*";
		}
}
void init_snake()								
{
	int n=3;
	head=new node;
	tail=head;
	head->x=40;
	head->y=12;
	while(n--)
	{
		p=new node;
		tail->next=p;
		p->x=tail->x-1;
		p->y=tail->y;
		tail=p;
	}
	tail->next=NULL;
	node *q=head->next;
	gotoxy(head->x,head->y);
	cout<<'#';
	while(q!=NULL)
	{
		gotoxy(q->x,q->y);
		cout<<'*';
		q=q->next;
	}
}
void delete_snake()								
{
	while(head!=NULL)
	{
		node *q=head;
		head=q->next;
		delete q;
	}
}
void move()							
{
	gotoxy(tail->x,tail->y);
	cout<<" ";
	gotoxy(head->next->x,head->next->y);
	cout<<'*';
	gotoxy(head->x,head->y);
	cout<<'#';
	node *q=tail;
	tail=head;
	while(tail->next!=q)
	{
		tail=tail->next;
	}
	tail->next=NULL;
	delete q;
}
void control()						
{
	node *q=new node;
	q->next=head;
	q->x=head->x;
	q->y=head->y;
	head=q;
	switch(direction_a)
	{
		case 'w':	head->y--;break;
		case 's':	head->y++;break;
		case 'a':	head->x--;break;
		case 'd':	head->x++;break;
		default :	break;
	}
	move();
}
void limit()							
{
	
	if(direction_b=='s'&&direction_a=='w') direction_a='s'; 
	if(direction_b=='w'&&direction_a=='s') direction_a='w'; 
	if(direction_b=='a'&&direction_a=='d') direction_a='a'; 
	if(direction_b=='d'&&direction_a=='a') direction_a='d'; 
}
void panduan()							
{
	if(direction_a=='s') direction_b='s';
	if(direction_a=='w') direction_b='w';
	if(direction_a=='d') direction_b='d';
	if(direction_a=='a') direction_b='a';
}
void fool()							
{
	node *q;
	if(head->x==fool_x&&head->y==fool_y)
	{
		fool_x=(rand() % (79-2+1))+ 2;
		fool_y=(rand() % (22-2+1))+ 2;
		gotoxy(fool_x,fool_y); 
		cout<<"0";
		num=0;
		scores++;
		node *q=new node;
		q->x=tail->x;
		q->y=tail->y;
		tail->next=q;
		tail=q;
		tail->next=NULL;
	}
	q=head;
	while(q!=NULL)
	{
		if(q->x==fool_x&q->y==fool_y)
		{
			fool_x=(rand() % (79-2+1))+ 2;
			fool_y=(rand() % (22-2+1))+ 2;
			gotoxy(fool_x,fool_y); 
			cout<<"*";
			q=head;
			continue;
		}
		q=q->next;
	}
}
void isEnd()						
{
	end=true;
	Sleep(600);
	system("cls");
	gotoxy(35,8);
	cout<<"您 输 啦 ~";
	gotoxy(33,10);
	cout<<"您的分数为: "<<scores;
	gotoxy(31,12);
	cout<<"重新开始请输入y:";
	cin>>direction_a;
}
void zhuangwei()				
{
	node *q=head->next;
	while(q!=NULL)
	{
		if(head->x==q->x&&head->y==q->y)
		{
			isEnd();
			break;
		}
		q=q->next;
	}
}
void zhuangqiang()						
{
	if(head->x==80||head->x==1||head->y==24||head->y==1) 
	isEnd();
}

截图：

借鉴自：https://blog.csdn.net/lcsy000/article/details/77478987