DingDong.h

#ifndef SHAPE_H
#define SHAPE_H

#include <iostream>
using namespace std;

class Shape
{
public:
	Shape(){};
	//Shape constructor that takes in radius.
	Shape(double _radius) : radius(_radius){
	};

	//virtual function to calculate area of the shape.
	virtual double CalculateArea(){
		return 1;
	};

	//virtual function to calculate volume of the shape.
	virtual double CalculateVolume()
	{
		return 1;
	};

	//virtual function to print out the detail of the shape.
	virtual void print()
	{
		cout << "default shape" << endl;
	};

	double radius;

	static double PI;

};

double Shape::PI = 3.14;
#endif


#include "Shape.h"
#include <cmath>
#include <iostream>
#include <iomanip>

using namespace std;

//Cone class that inherits Shape
class Cone :public Shape
{
public:

	double height;
	Cone(){};
	Cone(double _radius, double _height) : Shape(_radius){
		height = _height;
	};

	~Cone();

	virtual double CalculateArea();
	virtual double CalculateVolume();
	virtual void print();
private:
};

//calculate area of a cone.
double Cone::CalculateArea()
{
	return (PI * radius * (radius + sqrt(radius*radius + height*height)));
}

//calculate volume of a cone.
double Cone::CalculateVolume()
{
	return (PI * height * (radius * radius) / 3);
}

//print details of a cone.
void Cone::print()
{
	cout << "-------" << endl;
	cout << "Cone" << endl;

	cout << "Radius: " << radius << endl;
	cout << "Height: " << height << endl;
	cout << "Area: " << fixed << setprecision(3) << CalculateArea() << endl;
	cout << "Volume: " << fixed << setprecision(3) << CalculateVolume() << endl;
}