1回答

• 

  眉眉眉

  2019-06-30 20:43:55

  class Pet
   {
    interface Iclimbtree
    {
     void climbtree();
    }
    interface Icatchmice
    {
     void catchmice();
    }
    public Pet(string name)
    {
     Name = name;
    }
    protected string Name;
    virtual public void printf()
    {
     Console.WriteLine(Name);

    }

      public class Dog:Pet,Icatchmice,Iclimbtree
    {
     
     public void catchmice()
     {
      Console.WriteLine(" " + Name + "catch");
     }
     public void climbtree()
     {
      Console.WriteLine(" " + Name + "tree");
     }
     public Dog(string name):base(name)
     {
      
     }
     override public void printf()
     {
      Console.WriteLine("mmm" + Name+"lll");

     }
    }
    public class Cat : Pet
    {
     public Cat(string name):base(name)
     {
      
     }
     override public void printf()
     {
      Console.WriteLine("mmm" + Name + "222");

     }
    }

   }
   class Program
   {
    static void Main(string[] args)
    {
     /*Pet dog1 = new Dog();
     dog1.Name = "eat";
     dog1.printf();
     Pet cat1 = new Cat();
     cat1.Name = "drink";
     cat1.printf();*/
     Pet[] pets = new Pet[] { new Dog("aaa"), new Cat("bbb") };
     for(int i=0;i<=pets.Length;i++)
     {
      pets[i].printf();
     }
     Cat cat1 = new Cat("Tom2");
     if(cat1 is Iclimbtree)
     {
      Iclimbtree cat = (Iclimbtree)cat1;
      cat.Iclimbtree();
     }
     

  
    }
   }

  
  

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