fork download
copy 
  1. #include <iostream>
  2.  
  3. /*
  4.     A
  5.    / \
  6.   B   C
  7.    \ /
  8.     D
  9. */
  10.  
  11. using namespace std;
  12.  
  13. class A
  14. {
  15. public:
  16. 	virtual string whoami() const
  17. 	{
  18. 		return "A";
  19. 	}
  20. };
  21.  
  22. class B : public A
  23. {
  24. public:
  25. 	virtual string whoami() const override
  26. 	{
  27. 		return "B";
  28. 	}
  29. };
  30.  
  31. class C : public A
  32. {
  33. public:
  34. 	virtual string whoami() const override
  35. 	{
  36. 		return "C";
  37. 	}
  38. };
  39.  
  40. class D : public B, public C
  41. {
  42. public:
  43. 	virtual string whoami() const override
  44. 	{
  45. 		return "D";
  46. 	}
  47. };
  48.  
  49. int main()
  50. {
  51. 	D *d = new D;
  52. 	B *b = d;
  53. 	C *c = d;
  54. 	A *b2a = b;
  55. 	A *c2a = c;
  56.  
  57. 	cout << d->whoami() << endl;
  58. 	cout << b->whoami() << endl;
  59. 	cout << c->whoami() << endl;
  60. 	cout << b2a->whoami() << endl;
  61. 	cout << c2a->whoami() << endl;
  62.  
  63. 	delete d;
  64. }
Success #stdin #stdout 0s 5308KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
D
D
D
D
D
https://ideone.com/bKIGI7
language:
C++ (gcc 8.3)
created:
10 hours ago
visibility:
secret

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!