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  1. using System;
  2.  
  3. public interface Foo
  4. {
  5.     Foo foo();
  6. }
  7.  
  8. class Foo_int : Foo
  9. {
  10.     private int content = 0;
  11.  
  12.     public Foo_int(int content)
  13.     {
  14.         this.content = content;
  15.     }
  16.  
  17.     public Foo foo()
  18.     {
  19.         return new Foo_int(content + 1);
  20.     }
  21.  
  22.     public override string ToString()
  23.     {
  24.         return content.ToString();
  25.     }
  26. }
  27.  
  28. public class Test
  29. {
  30.     public static Foo bar(Foo x)
  31.     {
  32.         return x.foo();
  33.     }
  34.  
  35.     public static void Main()
  36.     {
  37.         var x = new Foo_int(1);
  38.         Console.WriteLine(bar(x));
  39.     }
  40. }
Success #stdin #stdout 0.03s 33888KB
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2
https://ideone.com/qsAG72
language:
C# (gmcs 5.20.1)
created:
11 years ago
visibility:
public

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