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  1. #include <iostream>
  2. #include <vector>
  3.  
  4. // B is abstract
  5. class B
  6. {
  7. public:
  8.     virtual int getDefault() = 0;
  9. };
  10.  
  11. class C : public B
  12. {
  13. public:
  14.     int getDefault() override { return 1; }
  15. };
  16.  
  17. class D : public B
  18. {
  19. public:
  20.     int getDefault() override { return 5; }
  21. };
  22.  
  23. class ObjectDisplay
  24. {
  25. public:
  26. 	ObjectDisplay (B& b) : object (b) {}
  27.  
  28. 	void someFunction()
  29. 	{
  30.     	const auto result = object.getDefault();
  31.     	// do something
  32.     	std::cout << result << std::endl;
  33. 	}
  34.  
  35. private:
  36. 	B& object;
  37. };
  38.  
  39. class Container
  40. {
  41. public:
  42.     void addDisplay()
  43.     {
  44. 	    displays.push_back (ObjectDisplay (c));
  45.     	displays.push_back (ObjectDisplay (d));    
  46.     }
  47.  
  48.     void someFunction()
  49.     {
  50. 	    for (auto &display : displays)
  51.     		display.someFunction();
  52.     }
  53.  
  54. private:
  55.     C c;
  56.     D d;
  57.     std::vector<ObjectDisplay> displays;
  58. };
  59.  
  60. int main() {
  61. 	Container c;
  62. 	c.addDisplay();
  63. 	c.someFunction();
  64. 	return 0;
  65. }
Success #stdin #stdout 0s 5520KB
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1
5
https://ideone.com/HeDqEZ
language:
C++ 4.3.2 (gcc-4.3.2)
created:
3 years ago
visibility:
public

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