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Overriding a base class method in a derived class

#include <iostream>    class BaseClass  {  public:      // constructors      BaseClass() { std::cout << "BaseClass constructor...\n"; }      ~BaseClass() { std::cout << "BaseClass destructor...\n"; }        //Other methods      void Talk()const { std::cout << "BaseClass sound!\n"; }      void Sleep()const { std::cout << "I'm sleeping.\n"; }    protected:      int itsAge;      int itsWeight;  };    class DerivedClass : public BaseClass  {  public:      // Constructors      DerivedClass(){ std::cout << "DerivedClass constructor...\n"; }      ~DerivedClass(){ std::cout << "DerivedClass destructor...\n"; }        // Other methods      void Walk() { std::cout << "walk...\n"; }      void Eat() { std::cout << "eat...\n"; }      void Talk()const { std::cout << "talk!\n"; }    };    int main()  {      BaseClass baseObject;      DerivedClass derivedObject;      baseObject.Talk();      derivedObject.Talk();      return 0;  } BaseClass constructor... BaseClass constructor... DerivedClass constructor... BaseClass sound! talk! DerivedClass destructor... BaseClass destructor...