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  1. #include <iostream>
  2.  
  3. class A
  4. {
  5. protected:
  6.     int a_;
  7.     virtual bool SomeProtectedMethod() { return true; }
  8. };
  9.  
  10. class B: public A
  11. {
  12. public:
  13.     void print() { std::cout << a_ << std::endl; }
  14. };
  15.  
  16. class C: public B
  17. {
  18. public:
  19.     void print2(A * p) { std::cout << p->SomeProtectedMethod() << std::endl; }
  20. };
  21.  
  22. int main(int argc, char* argv[])
  23. {
  24.     A a;
  25.     B b;
  26.     C c;
  27.     b.print();
  28.     c.print2(&a);
  29.  
  30.     return 0;
  31. }
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
prog.cpp: In member function ‘void C::print2(A*)’:
prog.cpp:7: error: ‘virtual bool A::SomeProtectedMethod()’ is protected
prog.cpp:19: error: within this context
stdout
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Standard output is empty
https://ideone.com/2t3VWO
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

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