求C语言编写的五子棋程序。

#include<stdio.h>
#include<stdlib.h>
#include<graphics.h>
#include<bios.h>
#include<conio.h>

#define LEFT 0x4b00
#define RIGHT 0x4d00
#define DOWN 0x5000
#define UP 0x4800
#define ESC 0x011b
#define SPACE 0x3920

#define BILI 20
#define JZ 4
#define JS 3
#define N 19

int box[N][N];
int step_x,step_y ;
int key ;
int flag=1 ;

void draw_box();
void draw_cicle(int x,int y,int color);
void change();
void judgewho(int x,int y);
void judgekey();
int judgeresult(int x,int y);
void attentoin();

void attention()
{
char ch ;
window(1,1,80,25);
textbackground(LIGHTBLUE);
textcolor(YELLOW);
clrscr();
gotoxy(15,2);
printf("游戏操作规则：");
gotoxy(15,4);
printf("Play Rules:");
gotoxy(15,6);
printf(&quo