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  1. P *p = Create();
  2.  
  3. if(p is an instance of A)
  4.     ((A *)p)->ab();
  5. else if(p is an instance of B)
  6.     ((B *)p)->ab();
  7. else if(p is an instance of C)
  8.     ((C *)p)->cd();
  9. else if(p is an instance of D)
  10.     ((D *)p)->cd();
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https://ideone.com/KHufx
language:
C++ (gcc 8.3)
created:
12 years ago
visibility:
public

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