贪吃蛇代码实现

一、代码实现

#include<stdio.h>
#include<conio.h>
#include<graphics.h>
#include<stdlib.h>
using namespace std;
#define SNAKE_NUM 100
#define HEIGHT 480
#define WIDTH 640
//枚举
enum dir
{
	UP,
	DOWN,
	LEFT,
	RIGHT
};
//蛇
int score;
struct Snake {
	int size;//
	int dir;
	int speed;
	POINT coor[SNAKE_NUM];
}snake;
//食物
struct Food {
	int x;
	int y;
	bool flag;
	int size;
	DWORD color;
}food;
void GameInit()
{
	//init 初始化 graph图形窗口
	initgraph(WIDTH, HEIGHT);
 
	//初始化蛇 一开始有三节
 
	//随机数种子 GetTickCount()获取系统开机到现在经过的毫秒数
	srand(GetTickCount());
	snake.size = 3;
	snake.speed = 10;
	snake.dir = RIGHT;
	for (int i =0; i <snake.size; i++) {
		snake.coor[i].x = snake.size*10-(i)*10;
		snake.coor[i].y = 10;
		printf("%d %d", snake.coor[i].x, snake.coor[i].y);
	}
	//随机生成食物
	food.x = rand() % WIDTH + 1;
	food.y = rand() % HEIGHT + 1;
	food.size = snake.speed / 2;
	food.color = RGB(rand() % 256, rand() % 256, rand() % 256);
	food.flag = true;
 
}
void GameDraw() {
	setbkcolor(WHITE);
	cleardevice();
	setfillcolor(BLACK);
	//双缓冲绘图
	BeginBatchDraw();
	for (int i = 0; i < snake.size; i++) {
		solidcircle(snake.coor[i].x, snake.coor[i].y, snake.speed/2);
	}
	if (food.flag) {
		solidcircle(food.x, food.y, food.size);
	}
	EndBatchDraw();
	
}
void snakeMove() {
	for (int i = snake.size - 1; i > 0; i--) {
		snake.coor[i] = snake.coor[i - 1];
	}
	switch (snake.dir) {
	case UP:
		if (snake.coor[0].y - (snake.speed) / 2 <= 0) {
			snake.coor[0].y = HEIGHT;
		}
		snake.coor[0].y-=snake.speed;
		break;
	case DOWN:
		if (snake.coor[0].y + (snake.speed) / 2 >=640) {
			snake.coor[0].y = 0;
		}
		snake.coor[0].y += snake.speed;
		break;
	case LEFT:
		if (snake.coor[0].x - (snake.speed) / 2 <= 0) {
			snake.coor[0].x = WIDTH;
		}
		snake.coor[0].x-=snake.speed;
		break;
	case RIGHT:
		if (snake.coor[0].x + (snake.speed) / 2 >= 480) {
			snake.coor[0].x = 0;
		}
		snake.coor[0].x+=snake.speed;
		break;
	}
	
}
void keyControl() {
	//72 80 75 77  上下左右
	//kbhit
	if (_kbhit()) {
 
		switch (_getch()) {
		case 'w':
		case 72:
			if (snake.dir != DOWN) {
				snake.dir = UP;
			}
 
			break;
		case 's':
		case 80:
			if (snake.dir != UP) {
				snake.dir = DOWN;
			}
 
			break;
		case'a':
		case 75:
			if (snake.dir != RIGHT) {
				snake.dir = LEFT;
			}
 
			break;
		case'd':
		case 77:
			if (snake.dir != LEFT) {
				snake.dir = RIGHT;
			}
 
			break;
		case ' '://当按下空格时游戏暂停
			if (_getch() == ' ') {
				return;
			}
			break;
		}
 
	}
}
void eatFood() {
	if (food.x - snake.coor[0].x <= food.size && snake.coor[0].x - food.x <= food.size && food.y - snake.coor[0].y <= food.size && snake.coor[0].y - food.y <= food.size) {
		food.flag = false;
		snake.size++;
		score++;
	}
	if (!food.flag) {
		food.x = rand() % WIDTH + 1;
		food.y = rand() % HEIGHT + 1;
		food.size = snake.speed / 2;
		food.color = RGB(rand() % 256, rand() % 256, rand() % 256);
		food.flag = true;
	}
}
int main() {
	GameInit();
	while (1) {
		GameDraw();
		snakeMove();
		keyControl();
		eatFood();
		Sleep(200);
	}
	return 0;
}
 

二、easyx说明

eayx是针对c++的图形库，s可以帮助初学者上手游戏和图形化编程

 下载easyx库

easyx绘制图形坐标轴的原点位于界面的左上角，x轴向右为正，y轴向下为正，单位是像素点

Initgraph函数

参数

    width：绘图窗口的宽度。

    height：绘图窗口的高度。

    flag：绘图窗口的样式，默认为 NULL。可为以下值：

    值    含义

    EW_DBLCLKS    在绘图窗口中支持鼠标双击事件。

    EW_NOCLOSE    禁用绘图窗口的关闭按钮。

    EW_NOMINIMIZE    禁用绘图窗口的最小化按钮。

    EW_SHOWCONSOLE    显示控制台窗口。

    ps:也可以不写前面的EW_

cleardevice函数

使用当前背景色清空窗口

setbkcolor

设置背景颜色

setfillcolor

设置填充颜色

绘制圆

#include<stdio.h>
//1.包含图形库头文件，就能使用提供给我的函数
#include<graphics.h>
 
int main()
{
	//2.创建一个窗口,确定窗口大小,show_console(显现控制台)
	initgraph(640, 480, SHOWCONSOLE);
	//设置背景颜色，one，two两步才能设置背景颜色，位置不能颠倒
	setbkcolor(RGB(255,128,192));//one,设置背景颜色
	cleardevice();//two,清屏，初始化,清楚原来背景的黑色
 
	//3.画粑粑，圆
 
	setfillcolor(BLUE);//填充颜色为蓝色
	setlinecolor(YELLOW);//线的颜色为黄色
 
	circle(50, 50, 50);
 
	solidcircle(50, 250, 50);
	/*
	setbkcolor(GREEN);//重新设个背景色，更显著
	clearcircle(100, 150, 50);
	clearcircle(100, 250, 50);
	*/
	
	getchar();
	//2.1关闭窗口
	closegraph();
 
	return 0;
}