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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. struct S{
  5. 	int a = 0;
  6. 	S() = default;
  7. };
  8.  
  9. union U {
  10. 	S s;
  11. 	int i;
  12. 	U() {
  13.  
  14. 	}
  15. };
  16.  
  17. int main() {
  18. 	U u;
  19. 	u.s.a = 1;
  20. 	return 0;
  21. }
Success #stdin #stdout 0.01s 5536KB
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https://ideone.com/6kMuuu
language:
C++14 (gcc 8.3)
created:
2 years ago
visibility:
secret

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