给我一个贪吃蛇的C++语言

自己看吧:
#define N 200
#include <graphics.h>
#include <stdlib.h>
#include <dos.h>
#define LEFT 0x4b00
#define RIGHT 0x4d00
#define DOWN 0x5000
#define UP 0x4800
#define ESC 0x011b

int i,key;
int score=0;
int gamespeed=50000;

struct Food
{
int x;
int y;
int yes;
}
food;

struct Snake
{
int x[N];
int y[N];
int node;
int direction;
int life;
}
snake;
void Init(void);
void Close(void);
void DrawK(void);
void GameOver(void);
void GamePlay(void);
void PrScore(void);

void main(void)
{
Init();
DrawK();
GamePlay();
Close();
}

void Init(void)
{
int gd=DETECT,gm;
initgraph(&gd,&gm,"c:\\tc");
cleardevice();
}