geometry::Circle Class Reference

A circle defined by its radius. More...

#include <shapes.hpp>

Inheritance diagram for geometry::Circle:

Collaboration diagram for geometry::Circle:

Public Member Functions
	Circle (double radius)
	Construct a circle with the given radius.
double	area () const override
	Compute the area of the shape.
std::string	name () const override
	Return the human-readable name of the shape.
double	perimeter () const override
	Compute the perimeter of the shape.
double	radius () const
	Get the radius.
Public Member Functions inherited from geometry::Shape
virtual	~Shape ()=default
	Virtual destructor for safe polymorphic deletion.
std::string	describe () const
	Pretty-print shape information.

Additional Inherited Members
Static Public Member Functions inherited from geometry::Shape
static int	instance_count ()
	Get the total count of Shape instances created.
Protected Member Functions inherited from geometry::Shape
	Shape ()
	Increment the instance counter.

Detailed Description

A circle defined by its radius.

Area and perimeter are computed as:

\[ A = \pi r^2, \qquad P = 2\pi r \]

See also

Shape

Definition at line 103 of file shapes.hpp.

Constructor & Destructor Documentation

Circle()

geometry::Circle::Circle ( double radius )

inlineexplicit

Construct a circle with the given radius.

Parameters

radius

The radius (must be positive).

Precondition

\( r > 0 \)

Definition at line 110 of file shapes.hpp.

: radius_(radius) {}

References radius().

Member Function Documentation

area()

double geometry::Circle::area ( ) const

inlinenodiscardoverridevirtual

Compute the area of the shape.

Returns

The area in square units.

Implements geometry::Shape.

Definition at line 112 of file shapes.hpp.

                                               {
        return M_PI * radius_ * radius_;
    }

name()

std::string geometry::Circle::name ( ) const

inlinenodiscardoverridevirtual

Return the human-readable name of the shape.

Returns

A string like "Circle", "Rectangle", etc.

Implements geometry::Shape.

Definition at line 120 of file shapes.hpp.

{ return "Circle"; }

perimeter()

double geometry::Circle::perimeter ( ) const

inlinenodiscardoverridevirtual

Compute the perimeter of the shape.

Returns

The perimeter in linear units.

Implements geometry::Shape.

Definition at line 116 of file shapes.hpp.

                                                    {
        return 2.0 * M_PI * radius_;
    }

radius()

double geometry::Circle::radius ( ) const

inlinenodiscard

Get the radius.

Definition at line 123 of file shapes.hpp.

{ return radius_; }

Referenced by Circle().

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The documentation for this class was generated from the following file:

• demo/src/shapes.hpp