本文实例为大家分享了基于easyx的C++实现贪吃蛇的具体代码，供大家参考，具体内容如下
本代码来自于easyx讨论群的分享
先上效果图，其实也只是画了简单的圈圈代表蛇和食物，背景就是黑色的。
#include "stdafx.h"
#include <iostream>
#include <stdlib.h>
#include <time.h>
#include <conio.h>
#include <graphics.h>
#define N 100
using namespace std;
enum moved { UP, DOWN, LEFT, RIGHT };
class Snake {
private:
struct { //整条蛇的信息
int x;
int y;
}snake[100];
struct {
int life; //为1代表还活着，为0代表已经死了
int length; //代表蛇的长度，初始值为3
enum moved direction; //前进方向
}snake_head;
struct { //食物的信息
int x;
int y;
}food;
public:
void display(); //显示界面
void initSnake(); //随机生成蛇
void move();//蛇移动
void boundary_check();//边界判断
void _food();//生成食物
int food_eatcheck();//检查是否吃到食物,吃到则返回1，否则返回0
int snake_eat();//判断贪吃蛇是否咬到自己，咬到则返回1，否则返回0
void run(); //主要运行函数
};
void Snake::display() {
initgraph(800, 600);
setbkcolor(WHITE); //设置背景颜色为白色
cleardevice(); //将背景颜色刷新到窗口上
setfillcolor(BLACK); //设置填充的颜色为黑色，之后话填充的图形都是这个颜色
solidrectangle(20, 560, 560, 20);//这个区域每20*20为一个单位，一共有27*27个单位
}
//构造函数
void Snake::initSnake() {
srand((unsigned)time(NULL));
//因为一开始蛇是向右走的，所以不能让蛇初始化在太靠右边的地方
int x = rand() % 22 + 3; //范围是3-24
int y = rand() % 22 + 3; //加三是因为初始的长度是3，必须让整条蛇都在范围内
this->snake[0].x = x * 20 + 10;//加十是因为要确定圆心的位置
this->snake[0].y = y * 20 + 10;
//默认蛇一开始是横着的所以三段的y坐标相同
this->snake[1].y = this->snake[2].y = this->snake[0].y;
this->snake[1].x = this->snake[0].x - 20;
this->snake[2].x = this->snake[0].x - 40;
setfillcolor(GREEN); //设置填充色为绿色
solidcircle(this->snake[0].x, this->snake[0].y, 10); //画圆
solidcircle(this->snake[1].x, this->snake[1].y, 10);
solidcircle(this->snake[2].x, this->snake[2].y, 10);
this->snake_head.length = 3;
this->snake_head.life = 1;
this->snake_head.direction = RIGHT;
}
void Snake::move() {
char ch;
if (_kbhit()) { //如果有输入的话就返回1，没有输入的话就返回0
ch = _getch();//获取输入的字符
switch (ch) {
case 'w' :if (this->snake_head.direction != DOWN) this->snake_head.direction = UP; break;
case 'W':if (this->snake_head.direction != DOWN) this->snake_head.direction = UP; break;
case 's' :if (this->snake_head.direction != UP) this->snake_head.direction = DOWN; break;
case 'S':if (this->snake_head.direction != UP) this->snake_head.direction = DOWN; break;
case 'a':if (this->snake_head.direction != RIGHT) this->snake_head.direction = LEFT; break;
case 'A':if (this->snake_head.direction != RIGHT) this->snake_head.direction = LEFT; break;
case 'd':if (this->snake_head.direction != LEFT) this->snake_head.direction = RIGHT; break;
case 'D':if (this->snake_head.direction != LEFT) this->snake_head.direction = RIGHT; break;
default:break;
}
}
//将蛇尾变成黑色
int i = this->snake_head.length - 1;
setfillcolor(BLACK);
solidcircle(snake[i].x, snake[i].y, 10);
//接下来遍历每个身体，每个身体都更新为前一个身体，蛇头除外
for (; i > 0; i--) {
this->snake[i].x = this->snake[i - 1].x;
this->snake[i].y = this->snake[i - 1].y;
}
switch (this->snake_head.direction) {
case RIGHT:this->snake[0].x += 20; break;
case LEFT:this->snake[0].x -= 20; break;
case UP:this->snake[0].y -= 20; break;
case DOWN:this->snake[0].y += 20; break;
default:break;
}
setfillcolor(GREEN);
solidcircle(this->snake[0].x, this->snake[0].y, 10);//绘制蛇头
Sleep(1000);
}
void Snake::boundary_check() {
if (this->snake[0].x <= 30 || this->snake[0].x >= 550 || this->snake[0].y <= 30 || this->snake[0].y >= 550) {
this->snake_head.life = 0;
}
}
void Snake::_food() {
srand((unsigned)time(NULL));
int x = rand() % 21 + 3; //范围是3-23
int y = rand() % 21 + 3;
this->food.x = x * 20 + 10;
this->food.y = y * 20 + 10;
setfillcolor(YELLOW);
solidcircle(this->food.x, this->food.y, 10);
}
int Snake::food_eatcheck() {
if (this->snake[0].x == this->food.x && this->snake[0].y == this->food.y) {
//如果满足条件就是吃到食物了
this->snake_head.length++;//长度加一
setfillcolor(GREEN);
solidcircle(food.x, food.y, 10);
int k = this->snake_head.length;
//吃到食物之后最后要在尾巴处加一个长度
switch (this->snake_head.direction) {
case RIGHT:this->snake[k - 1].x = this->snake[k - 2].x - 20; this->snake[k - 1].y = this->snake[k - 2].y; break;
case LEFT:this->snake[k - 1].x = this->snake[k - 2].x += 20; this->snake[k - 1].y = this->snake[k - 2].y; break;
case UP:this->snake[k - 1].x = this->snake[k - 2].x; this->snake[k - 1].y = this->snake[k - 2].y + 20; break;
case DOWN:this->snake[k - 1].x = this->snake[k - 2].x; this->snake[k - 1].y = this->snake[k - 2].y - 20; break;
default:break;
}
setfillcolor(GREEN);
solidcircle(this->snake[k - 1].x, this->snake[k - 1].y, 10);
return 1;
}
return 0;
}
int Snake::snake_eat() {
int i;
for (i = 1; i < this->snake_head.length; i++) {
if (this->snake[i].x == this->snake[0].x && this->snake[i].y == this->snake[0].y) {
return 1;
}
}
return 0;
}
void Snake::run() {
display(); //显示游戏界面
initSnake();
_food(); //生成第一个食物
while (true) {
move(); //蛇移动
if (snake_eat() == 1) {
//自己吃到自己了，游戏失败
cout << "自己吃到自己了，游戏失败" << endl;
break;
}
boundary_check();//判断是否撞墙
if (this->snake_head.life == 0) {
//撞墙了
cout << "撞墙了，游戏结束" << endl;
break;
}
if (food_eatcheck() == 1) {
_food(); //吃到食物就重新生成一个食物
}
}
}
int main() {
Snake s;
s.run();
return 0;
}
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