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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. struct A_Root {
  5. 	int rootField;
  6. };
  7.  
  8. struct B_Root {
  9. 	int rootField;
  10. };
  11.  
  12. struct B_Derived : public B_Root {
  13. 	int derivedField;
  14. };
  15.  
  16.  
  17. struct C_Root {
  18. 	C_Root() {
  19. 	  rootField = 924;
  20. 	};
  21.  
  22. 	virtual ~C_Root() {
  23. 	};
  24.  
  25. 	int rootField;
  26. };
  27.  
  28. struct C_Sibling {
  29. 	~C_Sibling() {
  30. 		printf("called sibling dtor");
  31. 	};
  32.  
  33. 	int siblingField;
  34. 	int siblingField2;
  35. };
  36.  
  37. struct C_Derived : public C_Root, public C_Sibling {
  38. 	int derivedField;
  39. };
  40.  
  41. int main() {
  42. 	printf("A_Root: %d\n", sizeof(A_Root));
  43.  
  44. 	printf("\n");
  45.  
  46. 	printf("B_Root: %d / B_Derived: %d\n", sizeof(B_Root), sizeof(B_Derived));
  47.  
  48. 	printf("\n");
  49.  
  50. 	printf("C_Root: %d / C_Derived: %d / C_Sibling: %d\n", sizeof(C_Root), sizeof(C_Derived), sizeof(C_Sibling));
  51.  
  52. 	C_Root* derived = (C_Root*)new C_Derived();
  53.  
  54. 	(*derived).rootField = 3;
  55.  
  56.     printf("derived: %d\n", sizeof(derived));
  57.  
  58. 	printf("rootField: %d\n", (*derived).rootField);
  59.  
  60. 	delete derived;
  61.  
  62. 	return 0;
  63. }
Success #stdin #stdout 0s 15240KB
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stdin
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Standard input is empty
stdout
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A_Root: 4

B_Root: 4 / B_Derived: 8

C_Root: 16 / C_Derived: 24 / C_Sibling: 8
derived: 8
rootField: 3
called sibling dtor
https://ideone.com/A2AMBI
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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