刚刚学完C语言想着写个小项目巩固一下基础知识，为下一步学习打下坚实的基础，然后开始在各大网站博客寻找能做的项目，最终选择了贪吃蛇小游戏，大部分都是调用的库函数，没有用到链表，指针等较复杂的知识点。

直接上代码！

#define _CRT_SECURE_NO_WARNINGS  //防止编译出错
#include<stdio.h>
#include<graphics.h>             //需按照Easy图形库
#include<conio.h>
#include<time.h>
#include<stdlib.h>
typedef struct point
{
	int x;
	int y;
}mypoint;

//蛇的属性
struct Snake
{
	mypoint xy[100];        //蛇身最长100节
	int num;                //蛇的长度
	char position;          //方向
}snake;

//食物的属性
struct Food
{
	mypoint fdxy;
	int flag;
	int grade;
}food;

//窗口句柄
HWND hwnd = NULL;

//方向枚举
enum position{up,down,left,right};

//初始化蛇
void initSnake()
{
	snake.xy[2].x = 0;
	snake.xy[2].y = 0;

	snake.xy[1].x = 10;
	snake.xy[1].y = 0;

	snake.xy[0].x = 20;			//初始化坐标
	snake.xy[0].y = 0;

	snake.num = 3;				//初始化长度

	snake.position = right;		        //初始化方向
}

//绘制蛇
void drawSnake()
{
	for (int i = 0; i < snake.num; i++)
	{
		setlinecolor(BLUE);    //矩形边框颜色
		setfillcolor(RED);     //矩形方块颜色
		fillrectangle(snake.xy[i].x, snake.xy[i].y, snake.xy[i].x + 10, snake.xy[i].y + 10);//确定左上角和右下角的坐标绘制矩形
	}
}

//移动蛇
void moveSnake()
{
	for (int i = snake.num - 1; i > 0; i--) //前后位置互换实现移动
	{
		snake.xy[i].x = snake.xy[i-1].x;
		snake.xy[i].y = snake.xy[i - 1].y;
	}
	switch (snake.position)               //移动方向设定
	{
	case up:
		snake.xy[0].y -= 10;
		break;
	case down:
		snake.xy[0].y += 10;
		break;
	case left:
		snake.xy[0].x -= 10;
		break;
	case right:
		snake.xy[0].x += 10;
	}
}
//移动控制
void keyDown()
{
	char key = _getch();  //获取按键值
	switch (key)
	{
	case 'w':
	case 'W':
	case 72:
		if (snake.position != down)
			snake.position = up;
		break;
	case 's':
	case 'S':
	case 80:
		if (snake.position != up)
			snake.position = down;
		break;
	case 'a':
	case 'A':
	case 75:
		if (snake.position != right)
			snake.position = left;
		break;
	case 'd':
	case 'D':
	case 77:
		if (snake.position != left)
			snake.position = right;
		break;
	}
}
//初始化食物
void initFood()
{
	srand((unsigned int)time(NULL));	//随机种子
	food.fdxy.x = rand() % 80 * 10;		//确定随机出现的范围
	food.fdxy.y = rand() % 60 * 10;
	food.flag = 1;						//食物出现标志
	for (int i = 0; i < snake.num; i++)	//判断蛇是否与食物重合，若重合即重新产生
	{
		if (food.fdxy.x == snake.xy[i].x&&food.fdxy.y == snake.xy[i].y)
		{
			food.fdxy.x = rand() % 80 * 10;
			food.fdxy.y = rand() % 60 * 10;
		}
	}
}
//将食物绘制出来
void drawFood()		
{
	setlinecolor(BLUE);		//设置矩形边框线
	setfillcolor(BLUE);		//设置矩形颜色
	fillrectangle(food.fdxy.x, food.fdxy.y, food.fdxy.x + 10, food.fdxy.y + 10);
}

//蛇吃食物：判断食物与蛇头的坐标
void eatFood()
{
	if (snake.xy[0].x == food.fdxy.x&&snake.xy[0].y == food.fdxy.y)
	{
		food.flag = 0;		//将食物标志位清零
		snake.num++;		//蛇的长度加一
		food.grade += 10;   //分数加10
	}
}
//显示分数
void showGread()
{
	char grade[100] = "";
	sprintf(grade, "分数：%d", food.grade);
	setbkmode(TRANSPARENT);		//将文字类型设置为透明
	settextcolor(LIGHTBLUE);	//将文字颜色设置为浅蓝
	outtextxy(650, 30, grade);	//文字显示的具体位置
}
//游戏结束
//1.蛇头的位置超出边框范围
//2.蛇头与蛇身的位置重合
int endSnake()
{
	if (snake.xy[0].x < 0 || snake.xy[0].x>800 || snake.xy[0].y < 0 || snake.xy[0].y>600)
	{
		MessageBox(hwnd, "撞墙，游戏结束！", "游戏结束", 0);
		return 1;
	}
	for (int i = 1; i < snake.num; i++)
	{
		if (snake.xy[0].x == snake.xy[i].x&&snake.xy[0].y == snake.xy[i].y)
		{
			MessageBox(hwnd, "自杀，游戏结束！", "游戏结束", 0);
			return 1;
		}
	}
	return 0;
}

int main()
{
	//绘制窗口
	hwnd=initgraph(800, 600);
	setbkcolor(WHITE);			//将窗口背景设置为白色
	cleardevice();				//刷新界面
	initSnake();
	while (1)
	{
		cleardevice();//刷新界面
		drawSnake();
		moveSnake();
		eatFood();
		showGread();
		drawFood();

		//游戏结束就退出
		if (endSnake()){
			break;
			exit(0);
		}

		//仅当食物被吃掉的时候才产新的食物
		if (food.flag == 0){
			initFood();
		}

		//判读键盘是否按下
		if (_kbhit()){
			keyDown();
		}

		//设置速度
		Sleep(150);
	}
	_getch();		//防止屏幕闪烁    
	closegraph();   //关闭图形显示模式
	return 0;
}

遇到的一些困难：

1.编译器报错