import java.util.Scanner;

public class Test01 {
	public static void main(String[] args) {
		int qbcd=20;//定义棋盘大小
		String qbf="╋";//设置棋盘符号
		String[][] qiban=new String[qbcd][qbcd];//二维数组棋盘宽和高
		//设置棋盘坐标数
		String[] qbs= {"⒈","⒉","⒊","⒋","⒌","⒍","⒎","⒏","⒐","⒑","⒒","⒓","⒔","⒕","⒖","⒗","⒘","⒙","⒚","⒛"};
		//便利棋盘到棋盘最后一位坐标符号依次替换为坐标数
		for (int i = 0; i < qiban.length; i++) {
			for (int j = 0; j < qiban[i].length; j++) {
				if (i==qbcd-1) {
					qiban[i][j]=qbs[j];
				}else if (j==qbcd-1) {
					qiban[i][j]=qbs[i];
				}else {
					qiban[i][j]=qbf;
				}
			}
		}
		//打印棋盘
		for (String[] strings : qiban) {
			for (String string : strings) {
				System.out.print(string);
			}
			System.out.println();
		}	
		boolean bool=true;
		String hz="■";//设置棋子符合
		String bz="○";//设置棋子符合
		Scanner scan = new Scanner(System.in);//定义控制台输入
		
		while(true){
			System.out.println("请输入"+((bool)?"黑":"白")+"子，坐标。(x,y)");
			
			String zb=scan.next();
			String[] zzb=zb.split(",");//分割为数组
			int x=Integer.parseInt(zzb[0])-1;//取出数组0转换为int类型
			int y=Integer.parseInt(zzb[1])-1;//取出数组1转换为int类型
			if (x>18||x<0||y>18||y<0) {//判断输入合法性
				System.out.println("您的输入有误，请重新输入：");
				continue;//跳过后面的代码程序回到开头位置
			}
			if (!qiban[x][y].equals(qbf)) {//判断棋子是否重复
				System.out.println("您输入的当前位置已经有棋子了，请重新输入：");
				continue;//跳过后面的代码程序回到开头位置
			}
			qiban[x][y]=bool?hz:bz;//判断是什么棋子提交到数组指定坐标上
			//打印棋盘
			for (String[] strings : qiban) {
				for (String string : strings) {
					System.out.print(string);
				}
				System.out.println();
			}
			bool = !bool;//制反黑白子
		}
	}
}