///////////////////////////////////////////////////////
//
//	operators.cpp
//
//	Started 1/16/97 by Jeff Ondich
//	Last modified: 1/16/97
//
//	1.  Read the program.  What do you think it's going
//		to do?  Don't worry about the details of the
//		operator overloading syntax.  Just try to
//		get the rough idea of what's going on.
//
//	2.	Note that, strictly speaking, operator> and
//		operator<< are not member functions of Person.
//		What about the syntax of the implementations
//		of operator<< and operator> shows you that they
//		are not member functions?  Why are operator>
//		and operator<< allowed to use mAge and mName
//		directly (private data, after all....).
//
//	3.	Try to write and test your own operator== or
//		operator!= or operator>>.
//
////////////////////////////////////////////////////////

#include	<iostream.h>
#include	<string.h>

///////////////////////////////////////////////////////
// This Person class is ever-so-slightly more
// realistic than DopeyClass.  Yipee.
///////////////////////////////////////////////////////

const int kMaxNameLength = 30;

class Person
{
private:
	int		mAge;
	char	mName[kMaxNameLength];

public:
			Person( int age, char *name );

private:
	// Operators.  We're going to do
	// comparison (>) and output (<<).  There are many
	// operators that you can give meanings in this
	// fashion (==, !=, +, -, *, /, >>, etc.).  This is just
	// a beginning look at operator overloading.
	
	friend int operator>( const Person& LHS, const Person& RHS );
	friend ostream& operator<<( ostream& out, const Person& RHS );
};

Person::Person( int age, char *name )
{
	mAge = age;
	strncpy( mName, name, kMaxNameLength );
}

int operator>( const Person& LHS, const Person& RHS )
{
	if( strcmp(LHS.mName,RHS.mName) > 0 )
		return( true );
	else
		return( false );
}

ostream& operator<<( ostream& out, const Person& RHS )
{
	out << RHS.mName << " (age " << RHS.mAge << ")";
	return( out );
}



///////////////////////////////////////////////////////
//	The main program
///////////////////////////////////////////////////////

int main( void )
{
	Person		me(36,"Jeff"), her(27,"Zelda");
	
	if( me > her )
		cout << me << " is greater than " << her << endl;
	else
		cout << her << " is greater than " << me << endl;

	return( 0 );
}