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  1. #include <iostream>
  2.  
  3. class Creature
  4. {
  5. public:
  6.     Creature(const std::string& name) : name(name) {}
  7.  
  8.     virtual ~Creature() = default;
  9.     virtual void printInfo() const
  10.     {
  11.         std::cout << name;
  12.     };
  13.  
  14.     std::string name;
  15. };
  16.  
  17. template <typename T>
  18. class VampiredCreature : T
  19. {
  20. public:
  21.     VampiredCreature(const T& t, float sunlightSensitivity)
  22.     : T(t),
  23.       sunlightSensitivity(sunlightSensitivity) {}
  24.  
  25.     void printInfo() const override
  26.     {
  27.         T::printInfo();
  28.         std::cout << " vampired: " << sunlightSensitivity;
  29.     };
  30.     float sunlightSensitivity = 0.f;
  31. };
  32.  
  33. template <typename T>
  34. class WereWolfCreature : T
  35. {
  36. public:
  37.     WereWolfCreature(const T& t, int wolfHours) : T(t), wolfHours(wolfHours) {}
  38.  
  39.     void printInfo() const override
  40.     {
  41.         T::printInfo();
  42.  
  43.         std::cout << " wereWolf: " << wolfHours;
  44.     }
  45.     int wolfHours;
  46. };
  47.  
  48. using Vampire = VampiredCreature<Creature>;
  49. using Werewolf = WereWolfCreature<Creature>;
  50. using VampireWerewolf = WereWolfCreature<Vampire>;
  51.  
  52. int main()
  53. {
  54.     Creature bob("Bob");
  55.     Vampire dracula({"Dracula"}, 0.42f);
  56.     Werewolf wolf({"Mi-Wolf"}, 50);
  57.     VampireWerewolf vampireWereWolf({{"Wolf/Vampire"}, 0.51f}, 36);
  58.  
  59.     bob.printInfo();
  60.     std::cout << "\n-----------\n";
  61.     dracula.printInfo();
  62.     std::cout << "\n-----------\n";
  63.     wolf.printInfo();
  64.     std::cout << "\n-----------\n";
  65.     vampireWereWolf.printInfo();
  66.     std::cout << "\n-----------\n";
  67. }
  68.  
Success #stdin #stdout 0s 15248KB
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Standard input is empty
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Bob
-----------
Dracula vampired: 0.42
-----------
Mi-Wolf wereWolf: 50
-----------
Wolf/Vampire vampired: 0.51 wereWolf: 36
-----------
https://ideone.com/of6jfk
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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