$14\mathrm{.}3($The Circle class$)$

Implement $($add$)$ the relational operators $)$ In the Circle class In Lsting $10\mathrm{.}9,$ provided below for your convenlence, to order the Circle $0$

#ifndef CIRCLE$\_$H

#define CIRCLE$\_$H

class Circle

$\{.$

public:

Circle$()$;

Circle$($double$)$;

double getArea$()$ const;

double getRadius$()$ const;

void setRadius$($double$)$;

static int getNumberof$$bjects $)$;

private:

double radius;

$\}$;

static int numberOfObjects;

#endif

IMPORTANT:

Students regularly submit the Circle.h without Implementing the relational operators. Which is basically the listing $10\mathrm{.}10.$ Please understand, you should u the Circle. $h,$ Circle cpp$,$ and the test program.

#include "Circle. $h"$

int Circle: :numberOfObjects $=0$;

I$/$ Construct a circle object

$($ircle::$($ircle$()$

$\}$

radius $=1$

$\}$

numberofobjectst$+$;

$//$ Construct a circle object

Circle::Circle$($double newRadius$)$

$\{$

radius $=$ newRadius;

$\}$

numberOfObjects$++$;

$//$ Return the area of this circle

double $($ircle::getarea$()$ const

$\{$

$\}$

return radius $*$ radius $*3\mathrm{.}14159$;

$//$ Return the radius of this circle

double $($ircle: getradius$()$ const

$\{$

$\}$

return radius;

$//$ Set a new radius

void Circle::setRadius $($double newRadius$)$

$\{$

$\}$

radius newRadius $0?$ newRadius : $0$ ;

$//$ Return the number of circle objects

int $($ircle:: getNumberOfobjects O$)$

$\{$

$\}$

return numberofobjects;