text: class Cow: public Animal
  {
  public:
      Cow(std::string strName)
          : Animal(strName)
      {
      }
  
      // We forgot to redefine Speak
  };
  
  int main()
  {
      Cow cCow("Betsy");
      cout << cCow.GetName() << " says " << cCow.Speak() << endl;
  }