C++ Program - Need this done in Xcode. A Musician represents a player of some ki

Question

C++ Program - Need this done in Xcode.

A Musician represents a player of some kind of instrument. The subclass Pianist represents a piano player whose instrument is a piano. Define these two classes so that they have the behavior shown in the sample driver and the sample output below.

Implementation Details

Sample Driver

Musician

Musician( std::string instrument );
std::string getInstrument( ) const;
virtual void play( );

std::string myInstrument;

Pianist : public Musician

Pianist( );
virtual void play( );

Pianist * ptrP = new Pianist( );
cout << "ptrP->getInstrument()" << endl;
cout << ptrP->getInstrument( ) << endl; // piano
cout << "ptrP->play()" << endl;
ptrP->play();

Musician m;
Pianist p;
m = p;      /// legal
/// p = m; /// illegal!

Musician * temp;
cout << "temp pointing at a musician..." << endl;
temp = ptrM;
cout << "temp->play()" << endl;
temp->play( );
cout << "temp pointing at a pianist..." << endl;
temp = ptrP;
cout << "temp->play()" << endl;
temp->play( );

Sample Output

Implementation Details

Sample Driver

Musician

Musician( std::string instrument );
std::string getInstrument( ) const;
virtual void play( );

std::string myInstrument;

Pianist : public Musician

Pianist( );
virtual void play( );

Musician * ptrM = new Musician( "guitar" );
cout << "ptrM->getInstrument()" << endl;
cout << ptrM->getInstrument( ) << endl; // guitar
cout << "ptrM->play()" << endl;
ptrM->play();

Pianist * ptrP = new Pianist( );
cout << "ptrP->getInstrument()" << endl;
cout << ptrP->getInstrument( ) << endl; // piano
cout << "ptrP->play()" << endl;
ptrP->play();

Musician m;
Pianist p;
m = p;      /// legal
/// p = m; /// illegal!

Musician * temp;
cout << "temp pointing at a musician..." << endl;
temp = ptrM;
cout << "temp->play()" << endl;
temp->play( );
cout << "temp pointing at a pianist..." << endl;
temp = ptrP;
cout << "temp->play()" << endl;
temp->play( );

Sample Output

ptryM->getInstrument( )
guitar
ptrM->play()
musician playing her guitar
ptrP->getInstrument( )
piano
ptrP->play()
pianist playing the piano
temp pointing at a musician...
temp->play()
musician playing her guitar
temp pointing at a pianist...
temp->play()
pianist playing the piano

Explanation / Answer

#include<iostream>
#include<string>
using namespace std;
class Musician
{
   string instrument;
public:
   //defualt constructor
   Musician()
   {
       instrument = "";
   }
   //overloaded constructor
   Musician(string ins)
   {
       instrument = ins;
   }
   //get method
   string getInstrument() const
   {
       return instrument;
   }
   //depnding on the object play will be called either musiccian or pianist
   virtual void play()
   {
       cout << "musician playing her " << instrument<< endl;
   }

};
class Pianist:public Musician
{
public:
   Pianist() :Musician("Piano")
   {

   }
  
   virtual void play()
   {
       cout << "Pianist playing her " << getInstrument() << endl;
   }
  
};

int main()
{
   Musician * ptrM = new Musician("guitar");
   cout << "ptrM->getInstrument()" << endl;
   cout << ptrM->getInstrument() << endl; // guitar
   cout << "ptrM->play()" << endl;
   ptrM->play();
   Pianist * ptrP = new Pianist();
   cout << "ptrP->getInstrument()" << endl;
   cout << ptrP->getInstrument() << endl; // piano
   cout << "ptrP->play()" << endl;
   ptrP->play();

   Musician m;
   Pianist p;
   m = p; /// legal
   //p = m; /// illegal!
   Musician * temp;
   cout << "temp pointing at a musician..." << endl;
   temp = ptrM;
   cout << "temp->play()" << endl;
   temp->play();
   cout << "temp pointing at a pianist..." << endl;
   temp = ptrP;
   cout << "temp->play()" << endl;
   temp->play();
}

----------------------------------------------------------------

output:

ptrM->getInstrument()
guitar
ptrM->play()
musician playing her guitar
ptrP->getInstrument()
Piano
ptrP->play()
Pianist playing her Piano
temp pointing at a musician...
temp->play()
musician playing her guitar
temp pointing at a pianist...
temp->play()
Pianist playing her Piano

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