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  1. #include <iostream>
  2.  
  3. struct A
  4. {
  5. 	int x;
  6. 	A() : x(1) {}
  7. 	A(int X) : x(X) {}
  8. 	void DoStuff(){ std::cout<<"A::DoStuff"<<std::endl; }
  9. 	virtual void Go(){ std::cout<<"A::Go"<<std::endl; }
  10. 	virtual ~A(){}
  11. };
  12. struct B
  13. {
  14. 	int x;
  15. 	B() : x(2) {}
  16. 	void DoStuff(){ std::cout<<"B::DoStuff"<<std::endl; }
  17. 	virtual void Go(){ std::cout<<"B::Go"<<std::endl; }
  18. 	virtual ~B(){}
  19. };
  20.  
  21. struct C : A, B
  22. {
  23. 	virtual void Go(){ std::cout<<"C::Go"<<std::endl; }
  24. 	virtual ~C(){}
  25. };
  26. struct D : A, B
  27. {
  28. 	D() : A(4) {}
  29. 	using A::Go;
  30. 	virtual ~D(){}
  31. };
  32.  
  33. int main()
  34. {
  35. 	using namespace std;
  36.  
  37. 	C c;
  38. //	c.DoStuff(); //error
  39. 	c.A::DoStuff();
  40. 	c.B::DoStuff();
  41. 	c.Go();
  42. 	c.A::Go();
  43. 	c.B::Go();
  44. //	cout << c.x << endl; //error
  45. 	cout << c.A::x << endl;
  46. 	cout << c.B::x << endl;
  47.  
  48. 	cout << endl;
  49.  
  50. 	D d;
  51. //	d.DoStuff(); //error
  52. 	d.A::DoStuff();
  53. 	d.B::DoStuff();
  54. 	d.Go();
  55. 	d.A::Go();
  56. 	d.B::Go();
  57. //	cout << d.x << endl; //error
  58. 	cout << d.A::x << endl;
  59. 	cout << d.B::x << endl;
  60. }
Success #stdin #stdout 0.01s 2728KB
comments (?)
stdin 
Standard input is empty
stdout 
A::DoStuff
B::DoStuff
C::Go
A::Go
B::Go
1
2

A::DoStuff
B::DoStuff
A::Go
A::Go
B::Go
4
2
https://ideone.com/coOPY
language:
C++ (gcc 8.3)
created:
13 years ago
visibility:
public

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