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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. struct A
  5. {
  6. 	virtual void go(){ cout << "A" << endl; }
  7. 	virtual ~A(){}
  8. };
  9. struct B : A
  10. {
  11. 	void go(){ cout << "B" << endl; }
  12. 	virtual ~B(){}
  13. };
  14. struct C : B
  15. {
  16. 	void go(){ cout << "C" << endl; }
  17. 	virtual ~C(){}
  18. };
  19. struct D : B
  20. {
  21. 	virtual void go(){ cout << "D" << endl; }
  22. 	virtual ~D(){}
  23. };
  24.  
  25. int main()
  26. {
  27. 	B b;
  28. 	C c;
  29. 	D d;
  30. 	A &a1 (b);
  31. 	A &a2 (c);
  32. 	A &a3 (d);
  33. 	a1.go();
  34. 	a2.go();
  35. 	a3.go();
  36. }
Success #stdin #stdout 0.01s 2724KB
comments (?)
stdin 
Standard input is empty
stdout 
B
C
D
https://ideone.com/zGYyK
language:
C++ (gcc 8.3)
created:
13 years ago
visibility:
public

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