// PhoneNumber.h

#ifndef PHONENUMBER_H
#define PHONENUMBER_H

#include <string>

using namespace std;

class PhoneNumber {
   friend ostream & operator<<( ostream &, const PhoneNumber & );
   friend istream & operator>>( istream &, PhoneNumber & );

private:
   string areaCode;  // 3-digit prefisso
   string exchange;  // 3-digit esterno
   string line;      // 4-digit linea
public:
   PhoneNumber();
   string getLine() const;
};

#endif