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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. struct Number
  5. {
  6. 	virtual ~Number() = default;
  7. };
  8.  
  9. struct Integer : Number
  10. {
  11. 	int num = 0;
  12. 	void sum(const Number& n)
  13. 	{
  14. 		num += static_cast<const Integer&>(n).num;
  15. 	}
  16. };
  17.  
  18.  
  19. int main() 
  20. {
  21. 	Integer i1;
  22. 	i1.num = 31337;
  23. 	Integer i2;
  24. 	i2.num = 31338;
  25. 	i2.sum(i1);
  26. 	cout << i2.num << endl;
  27. 	return 0;
  28. }
Success #stdin #stdout 0s 3460KB
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https://ideone.com/MiSXFP
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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