贪吃蛇小游戏！童年的回忆

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<stdlib.h>

#include<conio.h>
#include<windows.h>
#include<time.h>


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

typedef struct FOOD
{
	int x;
	int y;
}food;

extern Snake* g_phead = NULL;
extern food* Food = NULL;
volatile int gamePaused = 0;

void GameStart();

void Welcome();

void creatmap();

void gotoxy(int x,int y);

void initsnake();

void movesnake(int dir);

void rungame();

void initfood(int n);

void drawfood();

int isSnakeAt(int x, int y);



enum Direction { UP = 72, DOWN = 80, LEFT = 75, RIGHT = 77 };
int main()
{
	srand((unsigned int)time(NULL));
	GameStart();
	rungame();

	return 0;
}

void GameStart()
{
	system("mode con cols=300 lines=200");
	Welcome();
	creatmap();
	initsnake();
	initfood(20); // 初始化食物




}
void Welcome()
{
	printf("\n\n\n\n\n\n");
	printf("\t\t\t\t ================================================= \n");
	printf("\t\t\t\t = \t\t\t\t\t\t = \n");
	printf("\t\t\t\t = \t\t\t\t\t\t = \n");
	printf("\t\t\t\t = \t\t欢迎来到贪吃蛇世界\t\t = \n");
	printf("\t\t\t\t = \t\t\t\t\t\t = \n");
	printf("\t\t\t\t = \t\t游戏开发者:Ynchen.\t\t = \n");
	printf("\t\t\t\t = \t\t\t\t\t\t = \n");
	printf("\t\t\t\t = \t\t\t\t\t\t = \n");
	printf("\t\t\t\t ================================================= \n");
	system("pause");
	system("cls");
}
void creatmap()
{
	int n;
  
	printf("请输入你要创建的地图大小n,输入30体验最佳：");
	
	
//	system("cls");
	if (scanf("%d", &n) != 1) 
	{ 
		printf("creatmap");
		return;
	}
	initfood(n);
	for (int i = 0;i < 2*(n+6); i+=2)
	{
		gotoxy(i, 0);
		printf("■");
		gotoxy(i, n-1);
		printf("■");
	}
	for (int i = 0; i <  n; i ++)
	{
		gotoxy(0,i);
		printf("■");
		gotoxy(2*(n-1),i);
		printf("■");
	}
	for (int i = 0; i < n; i++)
	{
		gotoxy(0, i);
		printf("■");
		gotoxy(2 * (n +5), i);
		printf("■");

		gotoxy(60, 10);
		printf("加速：+");

		gotoxy(60, 14);
		printf("减速：-");

		gotoxy(60, 2);
		printf("分数：");

		gotoxy(60, 6);
		printf("暂停：p");

		gotoxy(60, 17);
		printf("这是一条神");
		gotoxy(60, 18);
		printf("奇的小蛇能");
		gotoxy(60, 19);
		printf("够随时退后");
		gotoxy(60, 20);
		printf("还可以吃墙");
		gotoxy(60, 21);
		printf("壁(不建议)");
	}
}
void gotoxy(int x,int y)
{
	COORD pos = { (SHORT)x, (SHORT)y };
	HANDLE hOut = GetStdHandle(STD_OUTPUT_HANDLE); 
	SetConsoleCursorPosition(hOut, pos);
}
void initsnake()//链表的应用
{
	Snake*temp = (Snake*)malloc(sizeof(Snake));
	if (temp == NULL) {
		printf("内存分配失败\n");
		return;
	}
	temp->x = 20;
	temp->y = 15;
	temp->next = NULL;
	g_phead = temp;
	for (int i = 1; i <= 3; i++)
	{
		Snake*p = (Snake*)malloc(sizeof(Snake));
		if (p == NULL) {
			printf("内存分配失败\n");
			return;
		}
		p->x = 20 + 2 * i;
		p->y = 15;
		p->next = NULL;
		temp->next = p;
		temp=p;
	}
	temp = g_phead;
	while (temp != NULL)
	{
		gotoxy(temp->x,temp->y);
		printf("●");
		temp = temp->next;
	}
}

void movesnake(int dir) {
	Snake* p = g_phead;
	while (p->next != NULL) { // 找到蛇尾
		p = p->next;
	}
	Snake* temp = (Snake*)malloc(sizeof(Snake));
	if (temp == NULL) {
		printf("内存分配失败\n");
		return;
	}
	temp->next = NULL;
	if (dir == UP) {
		temp->x = p->x;
		temp->y = p->y - 1;
	}
	else if (dir == DOWN) {
		temp->x = p->x;
		temp->y = p->y + 1;
	}
	else if (dir == LEFT) {
		temp->x = p->x - 2;
		temp->y = p->y;
	}
	else if (dir == RIGHT) {
		temp->x = p->x + 2;
		temp->y = p->y;
	}
	p->next = temp;

	gotoxy(g_phead->x, g_phead->y);
	printf("  "); // 清除蛇头的旧位置
	gotoxy(temp->x, temp->y);
	printf("●");

	Snake* toDelete = g_phead;
	g_phead = g_phead->next;
	free(toDelete); 
}


void rungame() {
	int dir = RIGHT;
	int score = 0;
	int lastScore = 0;
	int lastFoodX = -1;
	int lastFoodY = -1;
	int speed = 500;

	while (1) {
		if (_kbhit()) {
			char ch = _getch();
			switch (ch) {
			case 'w': dir = UP; break;
			case 's': dir = DOWN; break;
			case 'a': dir = LEFT; break;
			case 'd': dir = RIGHT; break;
			case '=': speed = max(100, speed - 100); break; // 增加速度
			case '-': speed = min(1000, speed + 100); break; // 减少速度
			case 'p': // 按下 'P' 键暂停或恢复游戏
			case 'P': gamePaused = ~gamePaused; break; // 切换暂停状态
			}
		}

		if (!gamePaused)
		{ // 如果游戏没有暂停，更新游戏状态
			movesnake(dir);
			Snake* current = g_phead;
			while (current->next != NULL)
			{
				if (current->next->x == Food->x && current->next->y == Food->y) {
					score += 5; // 增加分数
					Snake* newTail = (Snake*)malloc(sizeof(Snake));
					if (newTail == NULL) {
						printf("内存分配失败\n");
						return;
					}
					Snake* current = g_phead;
					while (current->next != NULL) {
						current = current->next;
					}
					newTail->x = current->x; // 新节点的初始位置与蛇尾相同
					newTail->y = current->y;
					newTail->next = NULL;
					current->next = newTail; // 将新节点添加到蛇尾
					initfood(30); // 重新生成食物
					break;
				}
				current = current->next;
			}
		}
		// 更新蛇头位置
		gotoxy(g_phead->x, g_phead->y);
		printf("●");

		// 更新食物位置
		if (Food->x != lastFoodX || Food->y != lastFoodY) {
			gotoxy(lastFoodX, lastFoodY);
			printf(" ");
			gotoxy(Food->x, Food->y);
			printf("*");
			lastFoodX = Food->x;
			lastFoodY = Food->y;
		}

		// 更新分数
		if (score != lastScore) 
		{
			gotoxy(66, 2);
			printf("%d", score);
			lastScore = score;
		}

		Sleep(speed);
	}
}
void initfood(int n) {
    int m = 0;
    int k = 0;
    do {
        m = 1+rand() % (n-2); // 生成0~n-1的随机数
        k = 1+rand() % (n-2); // 生成0~n-1的随机数
    } while (isSnakeAt(m, k) || isSnakeAt(m + 1, k) || isSnakeAt(m, k + 1) || isSnakeAt(m + 1, k + 1));

    if (Food != NULL) {
        gotoxy(Food->x, Food->y); // 清除旧食物的位置
        printf(" ");
        free(Food); // 释放旧食物节点的内存
    }

    Food = (food*)malloc(sizeof(food));
    if (Food == NULL) {
        printf("内存分配失败\n");
        return;
    }
    Food->x = m * 2; // 将坐标调整为实际的显示坐标
    Food->y = k;
    drawfood(); // 重新绘制食物
}

void drawfood() {
	if (Food != NULL) {
		gotoxy(Food->x, Food->y);
		printf("*");
	}
}
int isSnakeAt(int x, int y) 
{
	Snake* temp = g_phead;
	while (temp != NULL) 
	{
		if (temp->x == x && temp->y == y) 
		{
			return 1; // 蛇头在食物位置
		}
		temp = temp->next;
	}
	return 0; // 蛇头不在食物位置
}