using System;

using System.Linq;

public class Lec07

{

    public static void Main()

    {

        string[] id = new string [10];

        string[] name = new string [10];

        string[] Lastname = new string[10];

        int count=0;

        while(true)

        {

            Console.WriteLine("Menu");

            Console.WriteLine("press 1 Input member [10]");

            Console.WriteLine("Press 2 show number of members");

            Console.WriteLine("Press 3 show all member");

            Console.WriteLine("Press 4 Exit");

            Console.WriteLine("Press enter menu :");

            string menu = Console.ReadLine();

            if(menu=="1")

            {

                Console.WriteLine("your choose 1st menu" );

                Console.Write("input student id{0}:",count+1);

                id[count] = Console.ReadLine();

                Console.Write("input name{0} :",count+1);

                name[count] = Console.ReadLine();

                Console.Write("input Lastname{0}",count+1);

                Lastname[count] = Console.ReadLine();

                count++;

            }   

            else if (menu== "2")

            {

                Console.WriteLine("your choose 2nd menu"); 

                Console.WriteLine("{0}members",count);

            }

            else if (menu== "3")

            {

                Console.WriteLine("your choose 3rd menu");

                for (int i=0;i<count;i++)

                {

                    Console.WriteLine("{0}.{1} {2} {3}",i+1,id[i],name[i],Lastname[i]);

                }

            }

            else if (menu== "4")

            {

                Console.WriteLine("your choose 4th menu");

                  break;

            }

            else

                Console.WriteLine("Please enter 1-4 menu only. .");

        }

    }

}