using System;

public class Program

{

    public static void Main()

    {

        string choice;

        string[,] name = new string[5,3]{

                                        {"   周子渝"," 李玉璽"," 周杰倫"},

                                        {"   李榮浩"," 郭采潔"," 林心如"},

                                        {"   林志玲"," 金敏俊"," 郭雪芙"},

                                        {"   林俊傑"," 郭碧婷"," 王大陸"},

                                        {"   趙曉薇"," 張家薰"," 黃宴亭"}};

        //name = new string[,] 

        do

        {

        Console.WriteLine("############");

        Console.WriteLine("銘傳點名系統");

        Console.WriteLine("************");

        Console.WriteLine("        第一個 第二個 第三個 ");

            int i,j,x,y;

            for(i=0;i<5;i++)

            {

                Console.Write("第"+(i+1)+"排 ");

​

                for(j=0; j<3; j++)

                {

                    Console.Write("");

                    Console.Write(name[i,j]);

                }

                Console.WriteLine();

            }

        Console.WriteLine();

        Console.WriteLine("請輸入...(點名請按a,按q離開)");

        choice=Console.ReadLine();

            if (choice =="a")

            {

                Console.WriteLine("");

                string password;

                Console.Write("請輸入管理員密碼");

                password = Console.ReadLine();

                if( !(password =="xx123"))

                {

                    Console.WriteLine();

                    Console.WriteLine("密碼錯誤");

                    break;

                }

                Console.Write("缺席者坐第幾排?");

                x=Convert.ToInt16(Console.ReadLine());

                Console.Write("缺席者坐第幾個?");

                y=Convert.ToInt16(Console.ReadLine());

                //name[x-1,y-1]= "* 缺席*";

                if ((x>=1) && (x<=5) && (y>=1) && (y<=3))

                {

                    name[x-1,y-1]=" *缺席*";

                }

                else

                {

                    Console.WriteLine();

                    Console.WriteLine("查無此人");

                    Console.WriteLine();

                }

            }

        Console.WriteLine();

        }

        while (choice !="q");

        Console.WriteLine("再見");

    }

}