Overriding a base class method in a derived class : derived class « Class « C++ Tutorial

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2. Class
3. 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...
BaseClass destructor...