//  CIS 235    Lecture 10
//  Example of an array of objects of different types
//      that share a commom base class
//  Use of virtual functions called by using a base class
//      pointer to illustrate "dynamic binding" of functions

//  NOTE:  We are studying the behavior of overridden functions

//  Lab 6 illustrates "static binding" of functions
//       1 - scoping
//       2 - alias   - ONLY for functions that are not virtual
//       3 - base class pointer - ONLY for functions that are not virtual
//       4 - casting
#include <iostream>
using std::cout; using std::endl; using std::cin;
#include "invent.h"
#include "pen.h"
#include "book.h"
#include "namedBook.h"
void main()
{
	// Create any array of pens,  books and namedBooks
	//   But arrays must all be of the same type
	//   So to have an array of pens, books and namedBooks we need
	//     an array of base class pointers.
	invent * *  data;
	int count;
	int i;
	cout << "How many items do you want to group together? ";
	cin >> count;
	data =  new  invent *  [ count];
	for( i = 0; i < count; i++)
	{
		cout << "Select p (pen) , b (book), or n (named book) ";
		char choice;
		cin >> choice;
		if ( choice == 'p' )
		  data[i] =  new pen;
		else if ( choice == 'b' )
		  data[i] = new book;
		else
		  data[i] = new namedBook;
		data[i]->kinput();     //   POLYMORPHIC Function
		//  the appropriate overridden method will be called
		//       based on the data type of the object
		//       the pointer variable points to
	}

	//  Generate a report of the entire inventory and
	//     give the total retail value
	cout << endl << "Inventory Report" << endl;
	double total = 0.0;
	for( i = 0; i < count; i++)
	{
		cout << data[i]->identify() << endl;    //    POLYMORPHIC Function
		data[i]->print(cout);                   //    POLYMORPHIC Function
		cout << endl;
		total += data[i]->getRetailValue();
	}
	cout << "\nTotal retail value is " << total << endl;

	//  Give back all of the memory
	//  First give back the contents
	for (i = 0; i < count; i++)
		delete data[i];
	//  Then give back the array of pointers
	delete [] data;
}

/*
How many items do you want to group together? 3
Select p (pen) , b (book), or n (named book) n
Enter data for a book
Enter code, number, cost, price
8753 4 24.55 49.98
Enter y if hardback y
Enter the name of the book - NO SPACES: C++_Programming
Select p (pen) , b (book), or n (named book) p
Enter data for a pen
Enter code, number, cost, price
2367 24 .45 .99
Enter the pen color
blue
Select p (pen) , b (book), or n (named book) b
Enter data for a book
Enter code, number, cost, price
5469 24 4.41 9.75
Enter y if hardback n

Inventory Report
named book
Code: 8753 Quantity: 4 Cost: 24.55 Price: 49.98
Type: Hardback
Book name: C++_Programming

pen
Code: 2367 Quantity: 24 Cost: 0.45 Price: 0.99
Color: blue

book
Code: 5469 Quantity: 24 Cost: 4.41 Price: 9.75
Type: Softback


Total retail value is 457.68
Named Book object leaving at address 003462F0
Book object leaving at address 003462F0
Inventory object leaving at address 003462F0
Pen object leaving at address 003464C0
Inventory object leaving at address 003464C0
Book object leaving at address 00346520
Inventory object leaving at address 00346520
Press any key to continue . . .
*/