🚀 go-pugleaf

I am teaching myself to program with "How To Program C++" by
Deitel & Deitel.  A great book.  In chapter eight, there is a
an example in the text on operator overloading.  When I code
the example, exactly as it appears in the book, I don't get
the output that they show...

Using g++ v2.4 on BSDI I compile with:

g++ -o fig8.3 fig8.3.C

here is the source:

********begin source
// FIG8_3.CPP
// Overloading the stream-insertion and
// stream-extraction operators.
#include <iostream.h>

class PhoneNumber {
   friend ostream &operator<<(ostream &, const PhoneNumber &);
  friend istream &operator>>(istream &, PhoneNumber &);
private:
   char areaCode[4];  // 3-digit area code and null
   char exchange[4];  // 3-digit exchange and null
   char line[5];      // 4-digit line and null
};

// Overloaded stream insertion operator (cannot be
// a member function).
ostream &operator<<(ostream &output, const PhoneNumber &num)
{
   output << "(" << num.areaCode << ") "
          << num.exchange << "-" << num.line;

   return output;     // enables cout << a << b << c;
}

// overloaded stream extraction operator
istream &operator>>(istream &input, PhoneNumber &num)
{
   input.ignore();                 // skip (
   input.getline(num.areaCode, 4); // input area code
   input.ignore(2);                // skip ) and space
   input.getline(num.exchange, 4); // input exchange
   input.ignore();                 // skip dash (-)
   input.getline(num.line, 5);     // input line

   return input;      // enables cin >> a >> b >> c;
}

main()
{
   PhoneNumber phone; // create object phone

   cout << "Enter a phone number in the "
        << "form (123) 456-7890:" << endl;

   // cin >> phone invokes operator>> function by
   // issuing the call operator>>(cin, phone).
   cin >> phone;

   // cout << phone invokes operator<< function by
   // issuing the call operator<<(cout, phone).
   cout << "The phone number entered was:" << endl
        << phone << endl;
   return 0;
}


*******end source

Here is the execution:

% ./fig8.3
Enter a phone number in the form (123) 456-7890:
(800) 555-1212
The phone number entered was:
(800) -
%

The output should be the full number.  

I tested the value of the PhoneNumber object with
printExchange() and printLine() functions.  Both print
funtions printed nothing leading me to conclude that the
culprit is the function:

friend istream &operator>>(istream &, PhoneNumber &);


I am stumped!  Is there a switch I need to throw to make
operator overloading work with g++?  A search of the man pages
has turned up nothing.


Thnaks for any light you can shed!

Best Regards,

Arthur
acinader@panix.com