// Author:  Keith A. Shomper
// Date:    11/17/03
// Purpose: To demonstrate a class
#include <iostream>

using namespace std;

class complex_number {
 public:
	// NOTE:  No defintions for copy constructor, assignment operator or a
	// destructor.  The default (i.e., compiler supplied) versions of these 
	// are acceptable.

	complex_number() : r(0.0), i(0.0) {}           // default constructor: inline
	complex_number(float real) : r(real), i(0.0) {}// convert constructor: inline
   complex_number(float real, float imag);        // two value constructor

	float real();
	float imag();

	friend complex_number operator+  (const complex_number &a, 
											    const complex_number &b);
	friend complex_number operator-  (const complex_number &a, 
											    const complex_number &b);
	friend complex_number operator*  (const complex_number &a, 
											    const complex_number &b);
	friend complex_number operator/  (const complex_number &a, 
											    const complex_number &b);

	friend bool           operator== (const complex_number &a, 
											    const complex_number &b);
	friend bool           operator!= (const complex_number &a, 
											    const complex_number &b);

	friend istream&       operator>> (istream &in,        complex_number &a);
	friend ostream&       operator<< (ostream &out, const complex_number &a);
 private:
	float r;
	float i;
};