4回答

• 

  慕尼黑7387225

  2018-11-04 19:37:03

  public static“ explicit” operator Cat(Dog dog)

  0 0
• 

  慕尼黑7387225

  2018-11-04 19:35:07

  改成隐士转换

  1 0

  乌薪王

  没有用啊，上面改成implicit，下面去掉（Cat)

  2018-11-04 22:03:35

  共 1 条回复 >

• 

  乌薪王

  2018-11-04 19:33:08

  输出：我叫hommy

            wow

            我叫

            meow
  

  
  

  
  
  1 0

  乌薪王

  我自己来解释一下把，形参不是字段

  2018-11-06 12:59:05

  共 1 条回复 >

• 

  乌薪王

  2018-11-04 19:31:26

  using System;

  namespace 装箱与拆箱
  {   abstract public class pet
      {
          public string name;
          
          public pet(string name)
          {
              Console.WriteLine("我叫" + name);
          }
          abstract public void speak();
         
      }
      public class Dog : pet
      {
          public Dog(string name):base(name)
          {
            
          }
         
          public override void speak()
          {
              Console.WriteLine("wow");
          }
          public static explicit operator Cat(Dog dog)
          {
              return new Cat(dog.name);
          }
      }
      public class Cat : pet
      {
          public Cat(string name) : base(name)
          {

          }
          public override void speak()
          {
              Console.WriteLine("meow");
          }
         
      }
     
      class Program
      {
          static void Main(string[] args)
          {
              Dog dog = new Dog("hommy");
              dog.speak();
              Cat cat = (Cat)dog;
              cat.speak();
              
          }
      }
  }
  

  
  

  0 0