asp.net4.5 practice~test3-12

 Console program

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace test3_12
{
    class Program
    {
        static void Main(string[] args)
        {
            User u1 = new User();
            User u2 = new User();
            Admin ad1 = new Admin();
            Admin ad2 = new Admin();
                       
            List<IPerson> persons = new List<IPerson>();
            persons.Add(u1);
            persons.Add(u2);
            persons.Add(ad1);
            persons.Add(ad2);

            foreach (IPerson p1 in persons)
            {
                p1.Login("user", "123");
                p1.Login("admin", "123");
            }
        }


    }

    public interface IPerson
    {
        void Login(string name, string pwd);
    }

    public class User : IPerson
    {
        public void Login(string name, string pwd)
        {
            if (name == "user" && pwd == "123")
            {
                Console.WriteLine("{0}登录成功，进入用户界面......", name);
            }
            else
            {
                Console.WriteLine("{0}登录失败",name);
            }
        }
    }

    public class Admin : IPerson
    {
        public void Login(string name, string pwd)
        {
            if (name == "admin" && pwd == "123")
            {
                Console.WriteLine("{0}登录成功，进入后台管理界面......",name);
            }
            else
            {
                Console.WriteLine("{0}登录失败",name);
            }
        }
    }
}