為什么我原來的構造方法沒有了
dog轉換成cat之后，cat沒有繼承dog的名字（構造方法），名字變成了空
烏薪王
2018-11-04
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2018-11-04
public static“?explicit” operator Cat(Dog dog)
2018-11-04
改成隱士轉換
2018-11-04
輸出：我叫hommy
????????? wow
????????? 我叫
????????? meow
2018-11-04
using System;
namespace 裝箱與拆箱
{?? 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();
? ? ? ? ? ??
??????? }
??? }
}