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  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. struct A;
  6. struct B;
  7.  
  8. struct A
  9. {
  10. 	inline void f();
  11.  
  12. 	B* b;
  13. 	int val;
  14. };
  15.  
  16. struct B
  17. {
  18. 	inline void f();
  19. 	A* a;
  20. 	int val;
  21. };
  22.  
  23. void A::f()
  24. {
  25. 	cout << b->a->val << endl;
  26. }
  27.  
  28. void B::f()
  29. {
  30. 	cout << a->b->val << endl;
  31. }
  32.  
  33. int main()
  34. {
  35. 	A a;
  36. 	B b;
  37. 	a.val = 10;
  38. 	b.val = 20;
  39. 	a.b = &b;
  40. 	b.a = &a;
  41.  
  42. 	a.f();
  43. 	b.f();
  44. }
  45.  
Success #stdin #stdout 0s 3340KB
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Standard input is empty
stdout
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10
20
https://ideone.com/upHRyK
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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