贪吃蛇C语言实现（有源码）

2024-01-04 15:30:02
开发
46

前言

之前学了一点easyx图形库的使用，掌握一些基本用法后就用贪吃蛇来进行实战了，运行视频放在csdn视频那一栏了，之前的烟花也是。

1.头文件

#define _CRT_SECURE_NO_WARNINGS 1
#include<easyx.h>
#include<conio.h>
#include<time.h>
#include<stdlib.h>
#include<stdbool.h>
#define NODE_HIGHT 40
#define NODE_WIDTH 40
typedef enum direction
{
	up,
	down,
	left,
	right,
}direction;
typedef struct node
{
	int x, y;
}node;

2.源文件

#include"snack.h"
void Paintgrid()
{
	for (int x = 0; x < 800; x += NODE_WIDTH)
		line(x, 0, x, 600);
	for (int y = 0; y < 600; y += NODE_WIDTH)
		line(0, y, 800, y);
}
void PaintSnack(node* nodes, int n)
{
	int left, right, top, bottom;
	for (int i = 0; i < n; i++)
	{
		left = nodes[i].x * NODE_WIDTH;
		top = nodes[i].y * NODE_WIDTH;
		right = (nodes[i].x + 1) * NODE_WIDTH;
		bottom = (nodes[i].y + 1) * NODE_WIDTH;
		solidrectangle(left, top, right, bottom);
	}
}
node* SnackMove(node* nodes, int length, int direction)
{
	node x = nodes[length - 1];
	for (int i = length - 1; i > 0; i--)
	{
		nodes[i] = nodes[i - 1];
	}
	node new_head = nodes[0];
	if (direction == up)
		new_head.y--;
	if (direction == down)
		new_head.y++;
	if (direction == left)
		new_head.x--;
	if (direction == right)
		new_head.x++;
	nodes[0] = new_head;
	return &x;
}
void playerchoice(direction* dir)
{
	if (_kbhit())
		switch (_getch())
		{
		case 'A':
		case'a':
			if (*dir != left)
				*dir = left;
			break;
		case 'd':
		case'D':
			if (*dir != right)
				*dir = right;
			break;
		case 'w':
		case'W':
			if (*dir != up)
				*dir = up;
			break;
		case 's':
		case'S':
			if (*dir != down)
				*dir = down;
			break;
		}
}
void setfood(node* food,node*nodes,int length,int* flag)
{
	srand((unsigned)time(NULL));
	if (*flag == 0)
	{
	again:
		food->x = rand() % (800 / NODE_WIDTH);
		food->y = rand() % (600 / NODE_HIGHT);
		for (int i = 0; i < length; i++)
		{
			if (food->x == nodes[i].x && food->y == nodes[i].y)
				goto again;
		}
		*flag= 1;
	}
	setfillcolor(YELLOW);
	solidrectangle(food->x * NODE_WIDTH, food->y * NODE_HIGHT, (food->x + 1) * NODE_WIDTH, (food->y + 1) * NODE_HIGHT);
	setfillcolor(WHITE);
 }
 bool isover(node* nodes,int length)
{
	 if (nodes->x >= 800/NODE_WIDTH || nodes->x < 0 || nodes->y < 0 || nodes->y>=600/NODE_HIGHT)
		 return true;
	 for (int i = 1; i < length; i++)
		 if (nodes->x == nodes[i].x && nodes->y == nodes[i].y)
			 return true;
	 return FALSE;
}
 void reset(node* nodes, int* length, direction* dir,int*flag)
 {
	 nodes[0] = { 5,7 };
	 nodes[1] = { 4,7 };
	 nodes[2] = { 3,7 };
	 nodes[3] = {2,7};
	 nodes[4] = {1,7};
	 *length = 5;
	 *dir = right;
	 *flag = 0;
 }
 int main()
 {
	 srand((unsigned)time(NULL));
	 initgraph(800, 600);
	 setbkcolor(RGB(164, 225, 202));
	 direction dir = right;
	 int  length = 5;
	 node nodes[100] = { {5,7},{4,7},{3,7},{2,7},{1,7} };//从蛇头到蛇尾
	 node food = { 0 };
	 int flag = 0;
	 while (1)
	 {
		 cleardevice();
		 Paintgrid();//初始化表格

		 setfood(&food, nodes, length, &flag);
		 PaintSnack(nodes, length);
		 Sleep(500);
		 playerchoice(&dir);
		 node* end = SnackMove(nodes, length, dir);
		 if (nodes[0].x == food.x && food.y == nodes[0].y)
		 {
			 length++;
			 nodes[length - 1].x = end->x;
			 nodes[length - 1].y = end->y;
			 flag = 0;
		 }
		 if (isover(nodes, length))
		 {
			 reset(nodes, &length, &dir,&flag);
		 }
	 }
	 closegraph();
	 return 0;
 }

3.解析

0.创建环境

我使用的是vs编译环境和easyx图形库，貌似easyx也支持Dev，具体的下载方法可以去吧站搜索，easyx的使用在吧站也有相关教程，包括vs的下载都有很详细的视频教程，所以就不再赘述了。

我们由于要用到随机数所以使用了<time.h><stdlib.h>头文件

关于随机数的使用若是不了解可以看看这篇博客

C语言rand函数，srand函数，time函数实现随机数，及猜数字小游戏-CSDN博客

图形库的使用需要<easyx.h>头文件

第一行的宏定义想必用vs的都知道，用来避免报错的

两个结构体是用来记录蛇的移动方向和坐标的。

#define _CRT_SECURE_NO_WARNINGS 1
#include<easyx.h>
#include<conio.h>
#include<time.h>
#include<stdlib.h>
#include<stdbool.h>
#define NODE_HIGHT 40
#define NODE_WIDTH 40
typedef enum direction
{
   up,
   down,
   left,
   right,
}direction;
typedef struct node
{
   int x, y;
}node;

我们只要知道以下几点就可以

1.把地图画出来

void Paintgrid()
{
   for (int x = 0; x < 800; x += NODE_WIDTH)
       line(x, 0, x, 600);
   for (int y = 0; y < 600; y += NODE_WIDTH)
       line(0, y, 800, y);
}

2.初始化并记录蛇的每个节点的坐标

void PaintSnack(node* nodes, int n)
{
   int left, right, top, bottom;
   for (int i = 0; i < n; i++)
   {
       left = nodes[i].x * NODE_WIDTH;
       top = nodes[i].y * NODE_WIDTH;
       right = (nodes[i].x + 1) * NODE_WIDTH;
       bottom = (nodes[i].y + 1) * NODE_WIDTH;
       solidrectangle(left, top, right, bottom);
   }
}

3.随机产生食物

void setfood(node* food,node*nodes,int length,int* flag)
{
   srand((unsigned)time(NULL));
   if (*flag == 0)
   {
   again:
       food->x = rand() % (800 / NODE_WIDTH);
       food->y = rand() % (600 / NODE_HIGHT);
       for (int i = 0; i < length; i++)
       {
           if (food->x == nodes[i].x && food->y == nodes[i].y)
               goto again;
       }
       *flag= 1;
   }
   setfillcolor(YELLOW);
   solidrectangle(food->x * NODE_WIDTH, food->y * NODE_HIGHT, (food->x + 1) * NODE_WIDTH, (food->y + 1) * NODE_HIGHT);
   setfillcolor(WHITE);
}

4.蛇移动坐标随之变化

node* SnackMove(node* nodes, int length, int direction)
{
   node x = nodes[length - 1];
   for (int i = length - 1; i > 0; i--)
   {
       nodes[i] = nodes[i - 1];
   }
   node new_head = nodes[0];
   if (direction == up)
       new_head.y--;
   if (direction == down)
       new_head.y++;
   if (direction == left)
       new_head.x--;
   if (direction == right)
       new_head.x++;
   nodes[0] = new_head;
   return &x;
}
void playerchoice(direction* dir)
{
   if (_kbhit())
       switch (_getch())
       {
       case 'A':
       case'a':
           if (*dir != left)
               *dir = left;
           break;
       case 'd':
       case'D':
           if (*dir != right)
               *dir = right;
           break;
       case 'w':
       case'W':
           if (*dir != up)
               *dir = up;
           break;
       case 's':
       case'S':
           if (*dir != down)
               *dir = down;
           break;
       }
}

5.蛇吃到食物会长长

//主函数中

if (nodes[0].x == food.x && food.y == nodes[0].y)
{
   length++;
   nodes[length - 1].x = end->x;
   nodes[length - 1].y = end->y;
   flag = 0;
}

6.碰到边界或自己会死，并设置游戏重开功能

bool isover(node* nodes,int length)
{
   if (nodes->x >= 800/NODE_WIDTH || nodes->x < 0 || nodes->y < 0 || nodes->y>=600/NODE_HIGHT)
       return true;
   for (int i = 1; i < length; i++)
       if (nodes->x == nodes[i].x && nodes->y == nodes[i].y)
           return true;
   return FALSE;
}

//主函数中

if (isover(nodes, length))
{
   reset(nodes, &length, &dir,&flag);
}

7.主函数调用函数

   srand((unsigned)time(NULL));
   initgraph(800, 600);
   setbkcolor(RGB(164, 225, 202));
   direction dir = right;
   int length = 5;
   node nodes[100] = { {5,7},{4,7},{3,7},{2,7},{1,7} };//从蛇头到蛇尾
   node food = { 0 };
   int flag = 0;
   while (1)
   {
       cleardevice();
       Paintgrid();//初始化表格

       setfood(&food, nodes, length, &flag);
       PaintSnack(nodes, length);
       Sleep(500);
       playerchoice(&dir);
       node* end = SnackMove(nodes, length, dir);
       if (nodes[0].x == food.x && food.y == nodes[0].y)
       {
           length++;
           nodes[length - 1].x = end->x;
           nodes[length - 1].y = end->y;
           flag = 0;
       }
       if (isover(nodes, length))
       {
           reset(nodes, &length, &dir,&flag);
       }
   }
   closegraph();

总结

一直想写个小游戏玩玩，现在也算是小小的玩了一把，可惜最近要复习，没有时间学图形库了，不然真希望继续做点东西。最后祝愿还没考的同学考出好成绩，考完的寒假快乐，工作的早点放假，

若是觉得这篇博客对你有帮助就点个赞支持一下博主吧，感谢！

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