//Shape class - base class
#ifndef SHAPE_H
#define SHAPE_H
#include <iostream>

class Shape{
	public:
		Shape() {}
        virtual ~Shape()     {}
        virtual float GetArea() = 0;
		virtual void Show() {}
};
#endif

//Circle class - derived from Shape class
#ifndef CIRCLE_H
#define CIRCLE_H
#include <iostream>
class Circle : public Shape {
	public:
		Circle(float radius) {_radius = radius;}
        virtual ~Circle()  {}
        virtual float GetArea(){
			_area=3.142*_radius*_radius;
            return _area;
		}
		virtual void Show(){
			std::cout << "CIRCLE" << '\t' << "Radius: " << _radius << '\t' << "Area: " << GetArea() << std::endl;
		}
	protected:
        float _radius;
		float _area;
};
#endif

#include "Shape.h"
#include <iostream>
#include <list>

using namespace std;

list<Shape*> createList(void){
	list<Shape*> ShapeList;
	int choice;
	cout << endl << "MAKE A LIST OF SHAPES" << endl;
	while(choice!=0){
		cout << endl << "To stop creating the list, press '0'" << endl;
		cout << "Please choose a shape to add to the list..." << endl;
		cout << "Enter '1' for a circle" << endl << endl;
		cin >> choice;
		if (choice==0){
			break;
		}
		switch(choice){
			case 1:	{float radius;
					cout << endl << "You have chosen 'Circle'" << endl;
					cout << "Please enter the radius:" << endl;
					cin >> radius;
					Circle aCircle = Circle(radius);
					//aCircle.Show();
					Shape *pCircle = 0;
					pCircle = &aCircle;
					ShapeList.push_back(pCircle);
					break;
					}
			default:{cerr << "Invalid choice. Please try again." << endl;
					break;
					}
		}
	}
	return ShapeList;
}

int main () {
    list<Shape*> myList = createList();
	
	for(list<Shape*>::const_iterator ci = myList.begin(); ci != myList.end(); ++ci){
		Shape *temp = *ci;
		temp->Show();
	}
	
	return 0;
}

virtual void Show() = 0;

        switch (choice) {
        case 1:{
                float radius;
                cout << endl << "You have chosen 'Circle'" << endl;
                cout << "Please enter the radius:" << endl;
                cin >> radius;
                Circle *pCircle = new Circle(radius);
                ShapeList.push_back(pCircle);
                break;
            }

myList.erase(myList.begin(), myList.end());