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  1. #include <iostream>
  2.  
  3. class A
  4. {
  5. public:
  6.     virtual void func() = 0;
  7. };
  8.  
  9. class B
  10. {
  11. public:
  12.     void func1() { std::cout << "func1\n"; };
  13.     void func2() { std::cout << "func2\n"; };
  14. };
  15.  
  16. class C1 : public A
  17. {
  18. private:
  19.     B &m_b;
  20. public:
  21.     C1(B &b) : m_b(b) {}
  22.     void func() override { m_b.func1(); }
  23. };
  24.  
  25. class C2 : public A
  26. {
  27. private:
  28.     B &m_b;
  29. public:
  30.     C2(B &b) : m_b(b) {}
  31.     void func() override { m_b.func2(); }
  32. };
  33.  
  34. void doSomeStuff(A &a) 
  35. {
  36.     a.func();
  37. }
  38.  
  39. int main()
  40. {
  41.     B b;
  42.  
  43.     {
  44.     C1 c(b);
  45.     doSomeStuff(c);
  46.     }
  47.  
  48.     {
  49.     C2 c(b);
  50.     doSomeStuff(c);
  51.     }
  52.  
  53.     return 0;
  54. }
Success #stdin #stdout 0s 16064KB
comments (?)
stdin 
Standard input is empty
stdout 
func1
func2
https://ideone.com/G3RjoM
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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