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  1. #include <iostream>
  2.  
  3. struct Base
  4. {
  5.     virtual ~Base(){}
  6.     virtual void Print() const
  7.     {
  8.         std::cout << "Base" << std::endl;
  9.     }
  10. };
  11.  
  12. struct Derived : Base
  13. {
  14.     virtual ~Derived(){}
  15.     virtual void Print() const
  16.     {
  17.         std::cout << "Derived" << std::endl;
  18.     }
  19. };
  20.  
  21. int main()
  22. {
  23.     Base *r1 = new Base;
  24.     Base *r2 = new Derived;
  25.  
  26.     r1->Print();
  27.     r2->Print();
  28.  
  29.     r1->~Base();
  30.     r2->~Base();
  31.     new ((void*)r1) Derived;
  32.     new ((void*)r2) Base;
  33.  
  34.     r1->Print();
  35.     r2->Print();
  36.  
  37.     delete r1;
  38.     delete r2;
  39. }
  40.  
Success #stdin #stdout 0s 3028KB
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Base
Derived
Derived
Base
https://ideone.com/HPCIAT
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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