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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. class Menu {
  5. private:
  6.     int price;
  7. public:
  8.     Menu(int p=0) :  price{p} {}
  9.     virtual string description() = 0;
  10.     virtual int getPrice() {
  11.         return price;
  12.     }
  13.     virtual ~Menu() {}
  14. };
  15. class WithLemon : public Menu {
  16. private:
  17.     Menu* meniu;
  18.  
  19. public:
  20.     WithLemon() = default;
  21.     WithLemon(Menu* n) :
  22.         meniu{ n } {}
  23.     string description() override {
  24.         return meniu->description() + " with lemon ";
  25.     }
  26. };
  27.  
  28. class WithCoffee : public Menu {
  29. private:
  30.     Menu* meniu;
  31. public:
  32.     WithCoffee(Menu* n) :
  33.         meniu{ n } {
  34.     }
  35.     string description() override{
  36.         return meniu->description() + " with coffee ";
  37.     }
  38.     int getPrice() override{
  39.     	return meniu->getPrice()+5; 
  40.     }
  41. };
  42.  
  43. class Breakfast : public Menu {
  44. private:
  45.       string name;
  46. public:
  47.     Breakfast(string n, int p) :
  48.         name{ n }, Menu{ p}  {
  49.     }
  50.     string description() override {
  51.         return name;
  52.     }
  53. };
  54.  
  55. int main() {
  56.     Breakfast a{"eggs", 10};
  57.     WithCoffee breakfast_with_coffee { &a };
  58.     cout << breakfast_with_coffee.description() << " " << breakfast_with_coffee.getPrice() << endl;
  59.     return 0;
  60. }
Success #stdin #stdout 0s 4384KB
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eggs with coffee  15
https://ideone.com/nahpj3
language:
C++14 (gcc 8.3)
created:
3 years ago
visibility:
public

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