head.h

又是本人编的小程序,是CC++中的重点和难点,重载运算符,小程序而已,

# ifndef OVERLOAD_H
# define OVERLOAD_H

# include <iostream>

using std::cout;
using std::cin;
using std::endl;
using std::ostream;
using std::istream;

# include <iomanip>

using std::setw;


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

private:
	char areaCode[ 4 ];
	char exchange[ 4 ];
	char line[ 5 ];

};



//overloaded stream-insertion operator;
//PhoneNumber::
ostream &operator<<(ostream &output, const PhoneNumber &num )
{
	output << "(" << num.areaCode << ")"
		<< num.exchange << "-" << num.line;

	return output;
}


//overloaded stream-extraction operator;
//PhoneNumber::
istream &operator>>(istream &input, PhoneNumber &num )
{
	input.ignore();
	input >> setw( 4 ) >> num.areaCode;
	input.ignore( 2 );
	input >> setw( 4 ) >> num.exchange;
	input.ignore();
	input >> setw( 5 ) >> num.line;

	return input;
}

# endif;