//A::A()
//B::B()
//A::Foo

#include <iostream>

using namespace std;

class A
{
public:
  A() { cout << "A::A()" << endl;}
  virtual void Foo() { cout << "A::Foo";}
};

class B : public A
{
public:
  B() { cout << "B::B()" << endl; }
  virtual void Foo() { cout << "B::Foo";}
};
  
int main() {
  try {
    throw B();
  }
  catch (A ex) {
    ex.Foo();
  }
  catch (B &ex) {
    ex.Foo();
  }
    
  return 0;
}