inheritance.cpp

#include <iostream>
#include <string>

using namespace std;

class Base{
private:
  string value = "base";
public:
  virtual string function(){ return value; }
};

class Derived: public Base{
private:
  string othervalue = "derived";
public:
  string function(){ return othervalue; }

};

int main(){

  Base * b = new Base();

  cout << b->function() << endl;
  b = new Derived();
  cout << b->function() << endl;

  return 0;
}