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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. class A {
  5. protected:
  6.     A() {cout << "A()" << endl;};
  7. };
  8.  
  9. class B : protected A {
  10. public:
  11.     static const B& get() {
  12. 		static B instance;
  13. 		return instance;
  14.     }
  15. protected:
  16. 	B():A() { cout << "B()" << endl;};
  17. };
  18.  
  19. int main() {
  20. 	// your code goes here
  21. 	// A a; won't compile
  22. 	// B b; won't compile too
  23. 	B::get();
  24. 	return 0;
  25. }
Success #stdin #stdout 0s 3340KB
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stdin
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Standard input is empty
stdout
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A()
B()
https://ideone.com/2B5Co0
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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