Please help me finish the project by following the comments. PM ifconfused. Than

Question

Please help me finish the project by following the comments. PM ifconfused. Thanks
This is a program retreives input from user and calculates/displays the input and the areas of a circle and a retangle.

class BasicShape   // Pure abstract baseclass
{
//Implement this class but make area protected notprivate
protected:
    //area, a double used to hold theshape's area.

public:   //Should include getArea that returnsthe value in the member variable area. calcArea  function should be a pure virtual function
   getArea    //this functionshould return the value in the member variable area
   calcArea //this function should be apure virtual function
};
class Circle : public BasicShape
{
   //Implement this class
private:
   long centerX;   //long integerused to hold X coordinate of circle's center.
   long centerY;  //long integer used to hold Y coordinate of circle'scenter.
   double radius; //double used tohold the circle's radius.
public:
   //Default constructor
   Circle()
   { centerX = 0.0;
      centerY = 0.0
      radius = 0.0; }
   //Constructor #2
   Circle(long x, long y, double rad)
   { centerX = x;
      centerY = y
      radius = rad; }

   double getcenterX() const  //returns the value in centerX
   { return centerX; }
   double getcenterY() const  //returns the value in centerY
   { return centerY; }
   double calcArea()const       //calculates theare of the circle and stores the result in the inherited memberarea
   { return rad * rad * pi; }
};
class Rectangle : public BasicShape
{
   //Implement this class
private:
   double width;   //long integerused to hold the width of the rectangle.
   double length; //long integer usedto hold the length of the rectangle.
public:
   //Default constructor
   Rectangle()
   { width = 0.0;
   length = 0.0; }
   //Constructor #2
   Rectangle(double w, double len)
   { width = w;
   length = len; }

   double getWidth() const  //returns the value in the width
   { return width; }
   double getLength() const //returnsthe value in the length
   { return length; }
   double calcArea() const   //calculates the area and stores the result in theinherited member area
   { return width * length; }
};
int main()
{
   //Variables for the circle
   long x, y;
   double rad;
   //Variables for theRectangle
   long length, width;
   // ask the user for values for x y andrad.
   cout << "Please enter the x corrdinate ofthe circle's center: ";
   cin >> x;
   cout << "Please enter the y corrdinate ofthe circle's center: ";
   cin >> y;
   cout << "Please enter the radius of thecircle: ";
   cin >> rad;

   //Create a circle object c
   Circle c (x, y, rad);

   cout << "The area of the circle is "<< c.getArea() << ".";

   // ask the user for values for lengthand width
   cout << "Please enter the length of therectangle: ";
   cin >> length;
   cout << "Please enter the width of therectangle: ";
   cin >> width;

   Retangle r (length, width);

   cout << "The area of the circle is "<< r.getArea() << "." << endl;
   //dynamically allocate a Rectangleobject and assign its address to r
   //display the area by calling the getArea()function
   system("pause");
   return 0;
}

Explanation / Answer

#ifndef BASICSHAPE_H

#define BASICSHAPE_H

//BasicShape class

//an abstract base class

class BasicShape

{

protected :

//a double used to hold the shape'sarea

double AREA;

public :

//this function should be pure virtualfunction

virtual void calcArea() = 0;

//this function should return the value in themember variable area

virtual double getArea() const = 0;

};

#endif

#ifndef CIRCLE_H

#define CIRCLE_H

#define PI 3.14159;

//Circle class

class Circle : public BasicShape

{

public :

//ctors

Circle();

Circle(long x, long y, double rad);

//accessors

double getcenterX() const;

double getcenterY() const;

//calculate area of shape

//inline function definition

void calcArea() { AREA = radius * radius * PI;}

double getArea() const { return AREA;}

private :

long CenterX, CenterY;

double radius;

};

#endif

//Circle class implementation

Circle::Circle() : CenterX(0), CenterY(0),radius(0.0)

{

//empty ctor body

}

Circle::Circle(long x, long y, double rad) :CenterX(x), CenterY(y), radius(rad)

{

//empty ctor body

}

//accessor functions

double Circle::getcenterX() const

{

return CenterX;

}

double Circle::getcenterY() const

{

return CenterY;

}

#ifndef RECTANGLE_H

#define RECTANGLE_H

//Rectangle class

class Rectangle : public BasicShape

{

public :

//ctors

Rectangle();

Rectangle(double, double);

//accessor functions

double getWidth() const;

double getLength() const;

//calc area

//inline function definition

void calcArea() { AREA = width * length;}

double getArea() const { return AREA;}

private :

double width, length;

};

#endif

//Rectangle Class implementation

Rectangle::Rectangle() : width(0.0),length(0.0)

{

//empty ctor body

}

Rectangle::Rectangle(double w, double len) :width(w), length(len)

{

//empty ctor body

}

//accessor functions

double Rectangle::getWidth() const

{

return width;

}

double Rectangle::getLength() const

{

return length;

}

//Driver portion

#include <iostream>

using std::cout;

using std::cin;

using std::endl;

int main()

{

//vars for Circle object

long x, y;

double rad;

//vars for Rectangle object

long length, width;

//ask user for values for x, y, andrad

cout << "Please enter the X coord of thecircle's center:" << endl;

cin >> x;

cout << "Please enter the Y coord of thecircle's center:" << endl;

cin >> y;

cout << "Please enter the radius of thecircle:" << endl;

cin >> rad;

//create Circle object

Circle c(x, y, rad);

//calculate area of circle

c.calcArea();

cout << "The area of the circle is: "<< c.getArea() << endl;

//ask user for values for Rectangleobject

cout << "Please enter the length of therectangle:" << endl;

cin >> length;

cout << "Please enter the width of therectangle:" << endl;

cin >> width;

//create Rectangle object

Rectangle r(length, width);

//calculate area of rectangle

r.calcArea();

cout << "The area of the rectangle is: "<< r.getArea() << endl;

//dynamically allocate a Rectangle object andassign it's address to r

//display the area by calling the getArea()function

Rectangle* dyn_rect = new Rectangle;

dyn_rect = &r;

cout << "The area of the 'dyn_rect'object is: " << r.getArea() << endl;

return 0;

}

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