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  1. #include <iostream>
  2.  
  3. struct D{
  4. 	int x;
  5. 	D(int a):x(a){}
  6. };
  7.  
  8. struct C{
  9. 	D d;
  10. 	C(int x=0):d(x){}
  11. 	friend C operator+(C a,C b){
  12. 		return C{a.d.x+b.d.x};
  13. 	}
  14. 	friend std::ostream& operator<< (std::ostream &os, const C &x){
  15. 		return os<<" C["<<x.d.x<<"]";
  16. 	}
  17.  
  18. };
  19.  
  20. int main()
  21. {
  22.  
  23. 	C c;
  24. 	c = 1 + c;
  25. 	std::cout << c;
  26.  
  27. 	return 0;
  28. }
  29.  
Success #stdin #stdout 0s 5028KB
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 C[1]
https://ideone.com/lE5nzN
language:
C++14 (clang 8.0)
created:
3 years ago
visibility:
public

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