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  1. using System;
  2.  
  3. class Animal {
  4. 	public virtual void talk() {
  5. 		Console.Write("...\n");
  6. 	}
  7. }
  8.  
  9. class Cat : Animal {
  10. 	public override void talk() {
  11. 		Console.Write("Meow!\n");
  12. 	}
  13. }
  14.  
  15. class NyanCat : Cat {
  16. 	// we dont want this one
  17. 	public virtual void talk() {
  18. 		Console.Write("NyanNyanNyanNyanNyanNyan Batman!\n");
  19. 	}
  20. }
  21.  
  22. class Dima : NyanCat {
  23. 	public override void talk() {
  24. 		Console.Write("DIMA THE BEST!\n");
  25. 	}
  26. }
  27.  
  28. public class Test {
  29. 	public static void Main() {
  30. 		Animal a = new Animal();
  31. 		a.talk();  // ...
  32.  
  33. 		a = new Cat();
  34. 		a.talk();  // Meow
  35.  
  36. 		a = new NyanCat();
  37. 		a.talk();  // Meow
  38.  
  39. 		a = new Dima();
  40. 		a.talk();  // Meow
  41.  
  42. 		// the reason: Cat.print() is not virtual,
  43. 		//   so we have broken the chain of virtuality
  44.  
  45. 		/********************/
  46.  
  47. 		// a new chain starts from NyanCat class
  48.  
  49. 		NyanCat cat = new NyanCat();
  50. 		cat.talk();  // Batman!
  51.  
  52. 		cat = new Dima();
  53. 		cat.talk();  // THE BEST
  54. 	}
  55. }
Success #stdin #stdout 0.04s 23920KB
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stdin
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Standard input is empty
stdout
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...
Meow!
Meow!
Meow!
NyanNyanNyanNyanNyanNyan Batman!
DIMA THE BEST!
https://ideone.com/hhIZqP
language:
C# (gmcs 5.20.1)
created:
8 years ago
visibility:
public

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