// Inheritance & upcasting
#include <iostream.h>

class Instrument {
public:
  void play() {
    cout << "Instrument::play"  << endl;
  }
};

// Piano erbt von Instrument und implementiert zusaetzliche Eigenschaften
class Piano : public Instrument {
// additional features
public:
void stimmen() {
      cout << "Piano::stimmen" << endl;
      }
void play() {
      cout << "Piano::play"  << endl;
      }
};

// Blaeser erben von Instrument
class Blaeser : public Instrument { // public members of Instrument are also 
                                    // public in Blaeser
//  public:                        
//  void play() {
//    cout << "Blaeser::play"  << endl;
//  }
};


class Trumpet : public Blaeser {
// implementation of Trumpet simulation to come later
};