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  1. #include <iostream>
  2. #include <vector>
  3. #include <memory>
  4.  
  5. class Fruit
  6. {
  7. public:
  8.     virtual void getOld() = 0;
  9. };
  10.  
  11. class Orange : Fruit
  12. {
  13. public:
  14.     Orange() {}
  15.  
  16.     void add(std::shared_ptr<Fruit> f)
  17.     {
  18.         v.push_back(f);
  19.     }
  20.  
  21.     std::shared_ptr<Fruit> get(int k)
  22.     {
  23.         return v[k];
  24.     }
  25.  
  26.     void getOld()
  27.     {
  28.         std::cout << "Orange - I'm old." << std::endl;
  29.     }
  30. private:
  31.     std::vector<std::shared_ptr<Fruit>> v;
  32. };
  33.  
  34. class Bitter : public Fruit
  35. {
  36. public:
  37.     Bitter() {}
  38.  
  39.     void getOld()
  40.     {
  41.         std::cout << "Bitter - I'm old." << std::endl;
  42.     }
  43.  
  44.     void getNew()
  45.     {
  46.         std::cout << "Bitter - I'm new." << std::endl;
  47.     }
  48. };
  49.  
  50. int main(int argc, char ** argv)
  51. {
  52.     auto orange = new Orange;
  53.     orange->add(std::make_shared<Bitter>());
  54.     auto bitter = orange->get(0);
  55.     bitter->getOld();
  56.  
  57.     return 0;
  58. }
Success #stdin #stdout 0s 3476KB
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Bitter - I'm old.
https://ideone.com/Lajcid
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
secret

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