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  1. #include <cstdio>
  2.  
  3. class Animal
  4. {
  5. 	protected: int _generation = 0;
  6.  
  7. 	public: Animal() : Animal(1) {		
  8. 	}
  9.  
  10. 	public: Animal(int generation) {
  11. 		_generation = generation;
  12. 	}
  13.  
  14. 	public: virtual Animal* spawn()
  15. 	{
  16. 		puts("Spawn From Animal");
  17. 		return new Animal(_generation + 1);
  18. 	}
  19. };
  20.  
  21. class Dog : public Animal
  22. {
  23. 	public: Dog() : Dog(1) {		
  24. 	}
  25.  
  26. 	public: Dog(int generation) {
  27. 		_generation = generation;
  28. 	}
  29.  
  30. 	public: virtual Dog* spawn()
  31. 	{
  32. 		puts("Spawn From Dog");
  33. 		return new Dog(_generation + 1);
  34. 	}
  35. };
  36.  
  37. int main()
  38. {
  39. 	Animal* a = new Dog();
  40. 	Animal* x = a->spawn();
  41.  
  42. 	Dog* b = new Dog();
  43. 	Dog* y = b->spawn();
  44.  
  45. 	return 0;
  46. }
Success #stdin #stdout 0s 3272KB
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Spawn From Dog
Spawn From Dog
https://ideone.com/eNGCpD
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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