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  1. #include <iostream>
  2.  
  3. class A
  4. {
  5. public:
  6.     virtual void func(int a = 1)
  7.     {
  8.         std::cout << "class A::" << a << "\n";
  9.     }
  10. };
  11.  
  12. class B : public A
  13. {
  14. public:
  15.     virtual void func(int a = 2)
  16.     {
  17.         std::cout << "class B::" << a << "\n";
  18.     }
  19. };
  20.  
  21. void func(A& a) { a.func(); }
  22.  
  23. int main()
  24. {
  25.     B b;
  26.     func(b);
  27.     b.func();
  28.  
  29.     return 0;
  30. }
  31.  
Success #stdin #stdout 0.02s 2724KB
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Standard input is empty
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class B::1
class B::2
https://ideone.com/xddDI
language:
C++ (gcc 8.3)
created:
12 years ago
visibility:
public

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