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  1. #include <iostream>
  2. #include <typeinfo>
  3. using namespace std;
  4.  
  5. class X { virtual void whatever(){}};
  6. class Y : public X {public: int a;};
  7.  
  8. int main() {
  9.     try{
  10.       X* x = new X;
  11.       X* y = new Y;
  12.       Y &yy = dynamic_cast<Y&>(*x);
  13.       cout << yy.a;
  14.     } catch(std::exception& e) {cout << e.what() << endl;}
  15. }
stdin
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Standard input is empty
compilation info 
prog.cpp: In function ‘int main()’:
prog.cpp:11: warning: unused variable ‘y’
stdout
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std::bad_cast
https://ideone.com/BdHLl
language:
C++ (gcc 8.3)
created:
13 years ago
visibility:
secret

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