贪吃蛇(c实现)

最近复习了结构体和链表,就想熟悉一下这些应用,因此观摩大佬写的贪吃蛇,自己照葫芦画瓢也写了一个出来.源博客地址为:https://blog.csdn.net/qq_40953281/article/details/79315254
不过我对此有一个方面的改动:
1.蛇不能在左移或者右移时,实现右移或者左移,或者上移或者下移时进行下移或者上移
下面为代码:

#include 
#include 
#include 
#include 
#include 


void gotoxy(int x,int y);
void welcome();
void start();
void print();
void del();
void change(int a,int b);
int control();
void move();
void create_food();
void eat();
void over();
int fail();


typedef struct Snake
{
	int x;
	int y;
	Snake *next;
}snake;

struct Food
{
	int x;
	int y;
}food;

char id[20];//玩加名称 
int num = 0;//食物数量 
snake *head;//头部 
snake *tail;//尾巴 
char key;//按键的获取 
int score = 0;//分数 
int count = 0;//小蛇身体长度 
char ans[10];
int left = 1;
int up = 1;
int down = 1;
int right = 1;


int main()
{
	welcome();
	start();
	if(!control())
	{
		over();
	}
	
	return 0;
}
//光标的控制 
void gotoxy(int x,int y)
{
	HANDLE handle;
	COORD coord;
	handle = GetStdHandle(STD_OUTPUT_HANDLE);
	coord.X = x;
	coord.Y = y;
	SetConsoleCursorPosition(handle,coord);
}
//打印空格来表示小蛇的身体 
void print(int x,int y)
{
	gotoxy(x,y);
	printf("■");
}
//打印空格来删除食物,或者小蛇的身体 
void del(int x,int y)
{
	gotoxy(x,y);
	printf("  ");
}
//游戏初始界面 
void welcome()
{
	system("color 0B");
	gotoxy(55,7);
	printf("welcome");
	gotoxy(20,8);
	printf("*********************************************************************"); 
	gotoxy(20,10);
	printf("游戏名称:贪吃蛇"); 
	gotoxy(20,11);
	printf("游戏说明:wsad为上下左右键,任意键为暂停键");
	gotoxy(20,12);
	printf("请输入你的ID:");
	gotoxy(20,13);
	printf("温馨提示:祝您游戏愉快\n");
	gotoxy(20,15);
	printf("*********************************************************************");
	gotoxy(33,12);
	gets(id);
}
//游戏开始界面 
void start()
{
	int x = 0;
	int y = 0;
	system("cls");
	for(int i=0;i<20; i++)
	{
		printf("■");
	}
	gotoxy(x,y);
	for(int i=0;i<20; i++)
	{
		printf("■");
		gotoxy(x,y++);
	}
	gotoxy(x,y-=1);
	for(int i=0;i<20; i++)
	{
		printf("■");
		gotoxy(x+=2,y);
	}
	gotoxy(x-=2,y);
	for(int i=0; i<20; i++)
	{
		printf("■");
		gotoxy(x,y--);
	}
	
	//蛇的初始化
	head = (snake*)malloc(sizeof(snake));
	tail = (snake*)malloc(sizeof(snake));
	snake *p = (snake*)malloc(sizeof(snake));
	
	head->x = 10;
	head->y = 10;
	
	p->x = 12;
	p->y = 10;
	
	tail->x = 14;
	tail->y = 10; 
	
	head->next = p;
	p->next = tail;
	tail->next = NULL; 
	
	gotoxy(47,0);
	printf("Menu:");
	gotoxy(47,2);
	printf("ID:%s",id);
	gotoxy(47,4);
	printf("score:%d",score);
	gotoxy(47,6);
	printf("Game introduction:w->up,s->down,a->left,d->right");
	gotoxy(47,8);
	printf("ant other keys to stop the game");
	gotoxy(0,24);
	
}
//整个程序的控制 
int control()
{
	while(1)
	{
		
		if(_kbhit())
		{
			key = _getch();
		}
		if(num == 0)
		create_food();
		gotoxy(0,22);
		move();
		gotoxy(0,22);
		eat();
		gotoxy(0,22);
		if(!fail()) return 0;
	}
	
	return 1;
}
//通过按键控制小蛇 
void move()
{
	snake *p = head;
	int a = p->x;
	int b = p->y;
	while(p->next != NULL)
	{
		del(p->x,p->y);
		p = p->next;
	}
	del(p->x,p->y);
	
	switch(key)
	{
		case 'w':
			if(up)
			{
				head->y-=1;
				change(a,b);
				up = 1;
				down = 0;
				left = 1;
				right = 1;	
				break;
			}
			break;
		case 's':
			if(down)
			{
				head->y+=1;
				change(a,b);
				up = 0;
				down = 1;
				left = 1;
				right = 1;
				break;
			}
			break;
		case 'a':
			if(left)
			{
				head->x-=2;
				change(a,b);
				up = 1;
				down = 1;
				left = 1;
				right = 0;
				break;
			}
			break;
		case 'd':
			if(right)
			{
				head->x+=2;
				change(a,b);
				up = 1;
				down = 1;
				left = 0;
				right = 1;
				break;
			}
			break;
		default:
			break;
	}
	p = head;
	gotoxy(p->x,p->y);
	printf("⊙");
	p = p->next;
	while(p->next != NULL)
	{
		print(p->x,p->y);
		p = p->next;
	}
	print(p->x,p->y);
	Sleep(100+count*10);
	
}
//改变链表每个节点的x,y来实现移动 
void change(int a,int b)
{
	snake *p = head->next;
	int mid1,mid2,_mid1,_mid2;
	mid1 = a;
	mid2 = b;
	
	while(p->next != NULL)
	{
		_mid1 = p->x;
		_mid2 = p->y;
		p->x = mid1;
		p->y = mid2;
		mid1 = _mid1;
		mid2 = _mid2;
		p = p->next;
	}
	p->x = mid1;
	p->y = mid2;
}
//创造食物 
void create_food()
{
	srand(time(NULL));
	int r_x = rand()%35+2;
	int r_y = rand()%18+1;
	snake *p = head;
	
	while(1)
	{
		if((r_x == p->x && r_y == p->y) || r_x % 2 != 0)
		{
			p = head;
			r_x = rand()%35+2;
			r_y = rand()%18+1;
		}
		if(p->next == NULL) break;
		else p = p->next;
	}
	
	food.x = r_x;
	food.y = r_y;
	num = 1;;
	gotoxy(r_x,r_y);
	printf("⊙");
}
//吃食物,增加蛇的长度 
void eat()
{
	snake *p = head;
	if(p->x == food.x && p->y == food.y)
	{
		snake *_new = (snake *)malloc(sizeof(snake));
		while(p->next != NULL)
		p = p->next;
		p->next = _new;
		_new->next = NULL;
		num = 0;
		score+=10;
		count++;
		gotoxy(47,0);
		printf("socre = %d",score);
	}
}
//失败的条件 
int fail()
{
	snake *p = head;
	if(p->x <= 1 || p->x >= 38 ||
			 p->y <= 0 || p->y >= 19)
			 return 0;
	else
	{
		p = p->next;
		while(1)
		{
			if(head->x == p->x && p->y == head->y)
			{
				return 0;
			}
			if(p->next != NULL) p = p->next;
			else break;
		}
	}
	return 1;
}
//游戏结束画面 
void over()
{
	system("cls");
	gotoxy(55,7);
	printf("game over");
	gotoxy(20,8);
	printf("*********************************************************************"); 
	gotoxy(20,10);
	printf("your score:%d",score);
	gotoxy(20,11);
	printf("come on!");
	gotoxy(20,13);
	printf("*********************************************************************");
}