Using c++ and showing a output window. Implement the relational operators (<, <=, ==, !=, >, >=) in the Circle class in Listing 10.9, CircleWithConstantMemberFunctions.h, to order the Circle objects according to their radi

Listing 10.9

1 #ifndef CIRCLE_H

2 #define CIRCLE_H

3

4 class circle

5 {

6 public:

7 Circle();

8 Circle(double);

9 double getArea() const;

10 double getRadius() const;

11 void setRadius(double);

12 static int getNumberOfObjects();

13

14 private:

15 double radius;

16 static int numerOfObjects;

17 };

18

19 #endif