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  1. #include <iostream>
  2.  
  3. class Parent
  4. {
  5. public:
  6.   Parent()
  7.   {
  8.     Id = new int;
  9.   }
  10.  
  11.   virtual Parent* Copy()
  12.   {
  13.     Parent* newParent = new Parent;
  14.     *(newParent->Id) = *Id;
  15.     return newParent;
  16.   }
  17.  
  18.   int* Id;
  19. };
  20.  
  21.  
  22. class Child : public Parent
  23. {
  24. public:
  25.   Child() : Parent()
  26.   {
  27.     SchoolId = new int;
  28.   }
  29.  
  30.   virtual Parent* Copy()
  31.   {
  32.     Child* newChild = new Child;
  33.     *(newChild->Id) = *Id;
  34.     *(newChild->SchoolId) = *SchoolId;
  35.     return newChild;
  36.   }
  37.  
  38.   int* SchoolId;
  39. };
  40.  
  41. int main()
  42. {
  43.   // Create a derived object
  44.   Child child;
  45.   *(child.SchoolId) = 2;
  46.   std::cout << *(child.SchoolId) << std::endl;
  47.  
  48.   // Copy the derived object
  49.   Parent* copiedChildBasePointer = child.Copy();
  50.   Child* copiedChild = dynamic_cast<Child*>(copiedChildBasePointer);
  51.   std::cout << *(copiedChild->SchoolId) << std::endl;
  52.  
  53.   return 0;
  54. }
  55.  
Success #stdin #stdout 0.01s 2856KB
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https://ideone.com/FlQ9LF
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

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