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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. enum class FruitType 
  5. {
  6.     AppleType = 0,
  7.     OrangeType = 1,
  8.     BananaType = 2,
  9. };
  10.  
  11. class Fruit 
  12. {
  13. public:
  14.     virtual FruitType fruit_type() const = 0;
  15. };
  16.  
  17. class DriedFruit : virtual public Fruit
  18. {
  19. };
  20.  
  21. class Apple: virtual public Fruit 
  22. {
  23. public:
  24.     FruitType fruit_type() const override { return FruitType::AppleType; }
  25. };
  26.  
  27. class DriedApple: virtual public Apple, virtual public DriedFruit 
  28. {
  29. };
  30.  
  31. int main()
  32. {
  33.     Fruit *somefruit = new DriedApple;
  34.  
  35.     std::cout << "Is Apple? " << std::boolalpha << (somefruit->fruit_type() == FruitType::AppleType) << std::endl;
  36.  
  37.     return 0;
  38. }
Success #stdin #stdout 0s 4300KB
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Is Apple? true
https://ideone.com/FFRzw2
language:
C++ (gcc 8.3)
created:
8 years ago
visibility:
public

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