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  1. #include <iostream>
  2.  
  3. class IA
  4. {
  5. public:
  6. 	virtual void error() = 0;
  7. 	virtual void n() { error(); }
  8. };
  9.  
  10. class X : public IA
  11. {
  12. public:
  13. 	void error()override {std::cout << "X error" << std::endl;}
  14. 	void notify() { IA::n(); }
  15. };
  16.  
  17. class Y : public IA
  18. {
  19. public:
  20. 	void error() override{std::cout << "Y error" << std::endl;}
  21. };
  22.  
  23. int main()
  24. {
  25. 	std::cout << "Hello world!" << std::endl;
  26.  
  27. 	X x;
  28. 	Y y;
  29. 	x.notify();
  30.  
  31. 	return 0;
  32. }
  33.  
  34.  
Success #stdin #stdout 0.01s 5304KB
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stdin
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45
stdout
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Hello world!
X error
https://ideone.com/v2VPqG
language:
C++14 (gcc 8.3)
created:
15 days ago
visibility:
public

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