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  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. class Abstract
  6. {
  7. public:
  8.     virtual void me() = 0;
  9.     virtual Abstract * Clone() = 0;
  10.     virtual ~Abstract(){}
  11. };
  12.  
  13. class Base: public Abstract
  14. {
  15. public:
  16.     void me()
  17.     {
  18.         cout << "Base\n";
  19.     }
  20.     Abstract * Clone()
  21.     {
  22.         return new Base;
  23.     }
  24.     virtual ~Base(){}
  25. };
  26.  
  27. class Derived: public Base
  28. {
  29. public:
  30.     void me()
  31.     {
  32.         cout << "Derived\n";
  33.     }
  34.     Derived * Clone()
  35.     {
  36.         return new Derived;
  37.     }
  38.     virtual ~Derived(){}
  39. };
  40.  
  41. void who(Abstract * a)
  42. {
  43.     Abstract * b = a->Clone();
  44.     b->me();
  45.     delete b;
  46. };
  47.  
  48. int main()
  49. {
  50.     Base    * b = new Base;
  51.     Derived * d = new Derived;
  52.  
  53.     who(b);
  54.     who(d);
  55.  
  56.     delete b;
  57.     delete d;
  58.  
  59. }
  60.  
  61.  
Success #stdin #stdout 0s 15240KB
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Base
Derived
https://ideone.com/4Yswxy
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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