基于c#的windows基础设计（学习日记2）【关于多态】

这次的多态很简单，没什么知识点。

直接贴代码了：

 1 public abstract class Animal //建立一个抽象类
 2 {
 3 private bool m_sex;
 4 private string m_sound;
 5 public bool Sex
 6 {
 7 get { return m_sex; }
 8 set { m_sex = value;}
 9 }
10 public string Sound
11 {
12 get { return m_sound; }
13 set { m_sound = value; }
14 }
15 public Animal()
16 {
17 Sex = false;
18 Sound = "Howl...";
19 }
20 public abstract string Roar();
21 }
22 public class Dog:Animal
23 {
24 bool Sex=true;
25 string Sound = "Wow..";
26 public override string Roar()
27 {
28 return ("Dog:" + Sound);
29 }
30 }
31 public class Cat : Animal
32 {
33 bool Sex = true;
34 string Sound = "Miaow..";
35 public override string Roar()
36 {
37 return ("Cat:" + Sound);
38 }
39 }
40 public class Cow : Animal
41 {
42 bool Sex = true;
43 string Sound = "Moooo..";
44 public override string Roar()
45 {
46 return ("Cow:" + Sound);
47 }
48 }

主函数的代码：

Animal animal;
Dog dog = new Dog();
Cat cat = new Cat();
Cow cow = new Cow();
animal = dog;
animal = cat;
animal = cow;
Console.WriteLine(dog.Roar());
Console.WriteLine(cat.Roar());
Console.WriteLine(cow.Roar());
Console.ReadKey();

再来个图片：