Cash Register Design Class That Can Be Used With

Cash Registerdesign Acashregisterclass That Can Be Used With The Inven

Design a CashRegister class that can be used with the InventoryItem class discussed in the chapter. The CashRegister class should perform the following: 1. Ask the user for the item and quantity being purchased. 2. Get the item’s cost from the InventoryItem object. 3. Add a 30% profit to the cost to get the item’s unit price. 4. Multiply the unit price times the quantity being purchased to get the purchase subtotal. 5. Compute the 6% sales tax on the subtotal to get the purchase total. 6. Display the purchase subtotal, tax and total on the screen 7. Subtract the quantity being purchased from the onHand variable of the InventoryItem class object. Implement both classes in a complete program. Feel free to modify the InventoryItem class in any way necessary. Be sure and loop the program so that multiple items can be purchases Input Validation: Do not accept a negative value for the quantity of items being purchased.

Sample Paper For Above instruction

Cash Register System Design and Implementation for Inventory Management

The development of a cash register system that integrates seamlessly with an existing inventory management system requires careful consideration of object-oriented programming principles, user input validation, and transaction processing logic. The goal is to create a flexible, reliable system that not only handles multiple product purchases but also maintains accurate inventory records. This paper explores the design, implementation, and testing of such a system using C++ classes, specifically focusing on the CashRegister and InventoryItem classes.

Introduction

Modern retail systems demand software that can efficiently manage product sales and inventory levels. The InventoryItem class serves as a data structure to store details about each product, such as description, cost, and units on hand. Conversely, the CashRegister class manages the sales process, including user prompts, price calculations, and inventory updates. The integration of these classes facilitates a comprehensive sales system capable of handling multiple transactions with input validation and real-time inventory adjustments.

Design of the InventoryItem Class

The InventoryItem class encapsulates product information and provides mutator and accessor functions for data manipulation. Key attributes include description, cost, and units on hand. The class is designed to be flexible, allowing modifications to suit specific application needs, such as adding a serial number or category attributes. Input validation within this class ensures that data stored remains consistent and logical. This class acts as the backbone for the inventory management, storing critical data that the CashRegister class references during transactions.

Design of the CashRegister Class

The CashRegister class orchestrates the sales process. It maintains a dynamic reference or copy of an InventoryItem array, representing current inventory. Core functions include prompting the user to select items and specify quantities, calculating the item's price with a 30% markup, computing subtotal, tax, and final total, and updating inventory counts. To ensure robustness, input validation prevents negative quantities and invalid menu selections. The class implementation supports multiple transactions through looping, enabling the sale of several items until the user decides to exit.

Implementation Details

The complete program is structured with careful separation of concerns. The InventoryItem class is defined with getter and setter methods. The CashRegister class is designed to be initialized with an array of InventoryItem objects, allowing scalable inventory management. The program’s main function initializes a sample inventory, instantiates a CashRegister object, and manages multiple sales sessions based on user input.

Sample Program Code

include <iostream>
include <iomanip>
include <vector>
include "InventoryItem.h"
include "CashRegister.h"
using namespace std;
int main() {
vector<InventoryItem> inventory = {
InventoryItem("Adjustable Wrench", 7.0, 10),
InventoryItem("Screwdriver", 3.5, 20),
InventoryItem("Pliers", 9.0, 35),
InventoryItem("Ratchet", 10.0, 10),
InventoryItem("Socket Wrench", 9.75, 7)
};
CashRegister registerSystem(&inventory);
char again;
do {
registerSystem.makeSale();
cout << "Do you want to purchase another item? (Y/N): ";
cin >> again;
again = toupper(again);
while (again != 'Y' && again != 'N') {
cout << "Invalid input. Please enter Y or N: ";
cin >> again;
again = toupper(again);
}
} while (again != 'N');
return 0;
}

Conclusion

This implementation demonstrates how object-oriented principles facilitate building modular, maintainable, and extendable systems for retail sales. The InventoryItem and CashRegister classes work together to manage inventory data and process sales with real-time inventory updates and accurate financial calculations. Features such as input validation and multi-item purchase capability make this system robust for real-world applications. Future enhancements could include database integration, more detailed inventory tracking, and graphical user interfaces to improve usability.

References

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