An example class hierarchy

Greeter.cpp

#include <iostream>

using namespace std;

class GenericGreeter {
 public:
  void Greet(const char* name) {
    cout << "Hi " << name << "." << endl;
  }
};

class FriendlyGreeter : public GenericGreeter {
 public:
  void Greet(const char* name) {
    cout << "Hello " << name << "! It's a pleasure to meet you!" << endl;
  }
};

int main() {
  FriendlyGreeter* friendlyGreeter = new FriendlyGreeter;
  GenericGreeter* genericGreeter = (GenericGreeter*)friendlyGreeter;

  friendlyGreeter->Greet("Bob");
  genericGreeter->Greet("Alice");

  delete friendlyGreeter;

  return 0;
}