C# 面向对象例题

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图书管理系统

请利用面向对象分析实现图片管理系统，具有录入，查询，删除，显示所有图书信息功能。
class Program  {      static void Main(string[] args)      {          BookManager bm = new BookManager();          bm.Init();      }  }  class Book  {      /// <summary>      /// 当一个对象被创建时，必须执行Book（构造函数)      /// </summary>      public Book()      {      }      public Book(string name, string author, int price)      {          this._name = name;          this._author = author;          this._price = price;      }      private string _name;      public string name { get { return _name; } }      private string _author;      public string Author { get { return _author; } }      private int _price;      public int Price { get { return _price; } }      public override string ToString()      {          return "<<" + name + ">>  " + _author + "  " + Price + "元";      }  }  class BookManager  {      public List<Book> list = new List<Book>();      public void Init()      {          ///Console.Clear();          Console.WriteLine("=====图书管理系统====");          Console.WriteLine("1. 录入");          Console.WriteLine("2. 查询");          Console.WriteLine("3. 删除");          Console.WriteLine("4. 显示所有图书");          Console.WriteLine("5. 退出");          Console.WriteLine("=====================");          Console.WriteLine("");          Console.Write("请输入功能序号:");          int action = int.Parse(Console.ReadLine());          switch (action)          {              case 1:                  Enter();                  Init();                  break;              case 2:                  Find();                  Init();                  break;              case 3:                  Dele();                  Init();                  break;              case 4:                  ShowAll();                  Init();                  break;              case 5:                  Environment.Exit(0);                  break;          }      }      public void Enter()      {          Console.Write("请输入书名:");          string bookname = Console.ReadLine();          Console.Write("请输入作者:");          string bookauthor = Console.ReadLine();          Console.Write("请输入价格:");          int bookprice = int.Parse(Console.ReadLine());          //利用自己定义的构造函数创建Book对象          Book book = new Book(bookname, bookauthor, bookprice);          Console.WriteLine("书名:" + book.name);          list.Add(book);          Console.WriteLine("图书录入成功!");      }      public void Find()      {          Console.Write("请输入要查询的书名:");          string name = Console.ReadLine();          Console.WriteLine("======查询结果如下======");          foreach (Book book in list)          {              if (book.name == name)              {                  Console.WriteLine(book);              }              Console.WriteLine();          }          Console.WriteLine();      }      public void Dele()      {          Console.Write("请输入要删除的书名:");          string name = Console.ReadLine();          foreach (Book book in list)          {              if (book.name == name)              {                  list.Remove(book);                  return;              }          }      }      public void ShowAll()      {          foreach (Book book in list)          {              Console.WriteLine(book);              Console.WriteLine();          }      }  }
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