// File: OrderItem.cpp
//
// Implementation of OrderItem base class.
//

#include <iostream>
#include "OrderItem.h"

using namespace std ;


// Default order item constructor. Makes zombie object.
//
OrderItem::OrderItem() :
   m_sku(0), m_price(0), m_quantity(0)
{
   // do nothing
}


// Alternate constructor. Use this one.
// By default, 1 item is added to the order.
//
OrderItem::OrderItem(unsigned int sku, unsigned int price) :
   m_sku(sku), m_price(price), m_quantity(1)
{
    // do nothing
}


// Print out the sku, price, quantity and cost.
//
void OrderItem::PrintItem() {
   cout << "SKU: " << m_sku 
        << "    Price: $" << m_price 
        << "    Quantity: " << m_quantity
        << "    Cost: $" << ItemCost(*this) 
        << "\n" ;
}


// Increase the quantity by 1.
//
void OrderItem::AddOne() {
   m_quantity++ ;
}


// Decrease the quantity by 1, if it is > 0. 
// Otherwise the quantity remains at 0.
//
void OrderItem::RemoveOne() {
   if (m_quantity > 0) m_quantity-- ;
}


// Compute the cost of an OrderItem.
// The cost of an item equals the price * quantity plus 5% tax rounded
// down.
//
unsigned int ItemCost(OrderItem& item) {

   // Implement this function !!!

}