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// Fig. 8.3: fig08_03.cpp
// Overloading the stream-insertion and
// stream-extraction operators.
#include <iostream>
using std::cout;
using std::cin;
using std::endl;
using std::ostream;
using std::istream;
#include <iomanip>
using std::setw;
// PhoneNumber class definition
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
}; // end class PhoneNumber
// 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 &num )
{
output << "(" << num.areaCode << ") "
<< num.exchange << "-" << num.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 &num )
{
input.ignore(); // skip (
input >> setw( 4 ) >> num.areaCode; // input area code
input.ignore( 2 ); // skip ) and space
input >> setw( 4 ) >> num.exchange; // input exchange
input.ignore(); // skip dash (-)
input >> setw( 5 ) >> num.line; // input line
return input; // enables cin >> a >> b >> c;
} // end function operator>>
int main()
{
PhoneNumber phone; // create object phone
cout << "Enter phone number in the form (123) 456-7890:\n";
// cin >> phone invokes operator>> by implicitly issuing
// the non-member function call operator>>( cin, phone )
cin >> phone;
cout << "The phone number entered was: ";
// cout << phone invokes operator<< by implicitly issuing
// the non-member function call operator<<( cout, phone )
cout << phone << endl;
return 0;
} // end main
/**************************************************************************
* (C) Copyright 1992-2003 by Deitel & Associates, Inc. and Prentice *
* Hall. All Rights Reserved. *
* *
* DISCLAIMER: The authors and publisher of this book have used their *
* best efforts in preparing the book. These efforts include the *
* development, research, and testing of the theories and programs *
* to determine their effectiveness. The authors and publisher make *
* no warranty of any kind, expressed or implied, with regard to these *
* programs or to the documentation contained in these books. The authors *
* and publisher shall not be liable in any event for incidental or *
* consequential damages in connection with, or arising out of, the *
* furnishing, performance, or use of these programs. *
*************************************************************************/
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