图书管理系统

• 题目描述：

  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。

• 解题代码：

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();
          }
      }

  }