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  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. 	int x;
  17.  
  18. 	virtual string whoami() const
  19. 	{
  20. 		return "A";
  21. 	}
  22.  
  23. 	virtual ~A() {}
  24. };
  25.  
  26. class B : public A
  27. {
  28. public:
  29. 	virtual string whoami() const override
  30. 	{
  31. 		return "B";
  32. 	}
  33. };
  34.  
  35. class C : public A
  36. {
  37. public:
  38. 	virtual string whoami() const override
  39. 	{
  40. 		return "C";
  41. 	}
  42. };
  43.  
  44. class D : public B, public C
  45. {
  46. public:
  47. 	virtual string whoami() const override
  48. 	{
  49. 		return "D";
  50. 	}
  51. };
  52.  
  53. int main()
  54. {
  55. 	D *d = new D;
  56. 	B *b = d;
  57. 	C *c = d;
  58.  
  59. 	b->x = 1;
  60. 	c->x = 2;
  61. 	cout << b->x << endl;
  62. }
Success #stdin #stdout 0.01s 5320KB
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https://ideone.com/WCPIGs
language:
C++ (gcc 8.3)
created:
9 hours ago
visibility:
secret

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