1.3c. Pure Abs\ act Bast Class Project Define a pure abstract base class ca lled

Question

1.3c. Pure Abs act Bast Class Project
Define a pure abstract base class ca lled BasicShape. The Baaicshape class should
have the following members:
Private Member Variable:
area, a double used to hold the shape's area.
Public Member Functions:
getArea. This function should rerum the value in the member variable area.
calcArea. This function should be a pure virrual function.
Next, define a class named Circle. It should be derived from the Basicshape class.
It should have the fo llowing members:
Private Member Variables:
centerX, a long integer used to hold the x coordinate of the circle's center.
centerY, a long integer used to hold the y coordinate of the circle's center.
radius, a double used to hold the circle's radius.
Public Member Functions:
constructor-accepts values for centerX, centerY, and radius. Should call the
overridden calcArea function described below.
getCenterx-returns the value in centerX.
getCenterY-rerurns the value in centerY.
calcArea---calculates the area ofthe circle (area = 3.14159 .... radius .... radius)
and stores the resu lt in the inherited member area.
Next, define a class named Rectangle. Ir should be derived from the BasicShape
class. I[ should have [he following members:
Private Member Variab les:
width, a long integer used to hold the width of the rectangle.
length, a long integer used to hold the length of the rectangle.
Public Member Functions:
constructor-accepts va lues for width and length. Should call the overridden
calCArea function described below.
get'Width-returns the value in width.
getLength- returns the value in length.
calCArea-calculates the area of the rectangle (area = length " width) and stores
the rcsulr in the inherited member area.
After you have created these classes, create a driver program that defines a Circle
object and a Rectangle object. Demonstrate that each object properly calculates and
reports its area

Explanation / Answer

class BasicShape { private: double area; public: double getArea() {return area;} virtual double calcArea() = 0; }; class Circle : public BasicShape { private: long int centerX, centerY; double radius; };

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