Final answer:
The question outlines the design of a Marble_Inventory class, which manages marble inventory including features like adding, removing marbles, and calculating the total value of the inventory. The class includes a private int data field for marble id and methods to handle inventory updates and value calculation.
Step-by-step explanation:
Class Design for Marble_Inventory
The task of managing marble inventory for reselling purposes requires a system that is capable of handling the creation of new marble objects, and the updating of inventory upon purchasing and selling them. Moreover, the system should be able to provide the total value of the stock at any given time. For this purpose, a Marble_Inventory class can be designed with certain attributes and methods.
Firstly, we start with a private data field named id, which is unique for each marble and is an int type. The uniqueness of id ensures that each marble can be tracked individually.
Additionally, more attributes will be included in this class:
- A private string data field named type to store the type of marble.
- A private string field named color to store the color of the marble.
- A private double field named price to store the price at which the marble is bought or sold.
- A private static double field named totalValue to keep track of the total value of the inventory.
- A private List or Array to store the collection of marbles.
The Marble_Inventory class will contain methods for adding a new marble to the inventory, which will update the total value. Similarly, when a marble is sold, the inventory will be updated, and the total value will be adjusted. The method getTotalValue will calculate the cumulative value of all marbles in the inventory.
Basic getters and setters will be required for each private field, with particular attention to maintaining the integrity of the id field, ensuring that it remains unique and unmodified after object creation.