phonenumber.cpp

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// Fig. 11.4: PhoneNumber.cpp
// Overloaded stream insertion and stream extraction operators
// for class PhoneNumber.
#include <iomanip>
using std::setw;

#include "PhoneNumber.h"

// overloaded stream insertion operator; cannot be 
// a member function if we would like to invoke it with
// cout << somePhoneNumber;
ostream &operator<<( ostream &output, const PhoneNumber &number )
{
   output << "(" << number.areaCode << ") "
      << number.exchange << "-" << number.line;
   return output; // enables cout << a << b << c;
} // end function operator<< 

// overloaded stream extraction operator; cannot be 
// a member function if we would like to invoke it with
// cin >> somePhoneNumber;
istream &operator>>( istream &input, PhoneNumber &number )
{
   input.ignore(); // skip (
   input >> setw( 3 ) >> number.areaCode; // input area code
   input.ignore( 2 ); // skip ) and space
   input >> setw( 3 ) >> number.exchange; // input exchange
   input.ignore(); // skip dash (-)
   input >> setw( 4 ) >> number.line; // input line
   return input; // enables cin >> a >> b >> c;
} // end function operator>> 

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