Student Lab Activity CIS170C Week 6 Lab Instructions

Student Lab Activitycis170c Week 6 Lab Instructionslab 6 Of 7 Menu Dr

You will code, build, and execute a Retail Item class that holds data about an item in a retail store. You will utilize classes in the design of this program. Write a Windows console application that creates three RetailItem objects—one with default values and two with user-entered values—and displays these items along with the total inventory count.

The RetailItem class should include private member variables: description (string), unitsOnHand (int), and price (double). It requires two constructors (default and parameterized), mutator functions (setters), and accessor functions (getters). The program should prompt the user to input values for price, units on hand, and description, validating that price and units are greater than zero before assignment.

The main program should create three RetailItem objects: the first initialized with default values, and the subsequent two using user-input values. It should display all items with descriptions, units, and prices, then compute and display the total inventory units across all items. The program should then prompt to press any key to end.

Paper For Above instruction

The development of object-oriented programming in C++ significantly enhances the modularity, flexibility, and reusability of code. In this context, designing a RetailItem class to represent items in a retail store demonstrates robust class utilization, encapsulation, and data management. This implementation aligns with key programming principles, fostering maintainable and scalable software architecture.

The RetailItem class encapsulates relevant attributes of a retail product, such as description, units on hand, and price. By declaring these member variables as private, the class enforces data hiding, ensuring that their manipulation occurs only through controlled member functions. The class provides two constructors: a default constructor initializing attributes with default values, and a parameterized constructor facilitating customized object creation. This dual-constructor approach offers flexibility in object instantiation, accommodating various initialization scenarios.

Accessor (getter) and mutator (setter) functions are implemented to allow controlled access and modification of each attribute. For example, setters validate input to ensure that units and prices are sensible (greater than zero), thereby maintaining data integrity. The getters provide read-only access to retrieve current attribute values, supporting information display and processing logic within the main program.

The main program demonstrates fundamental object-oriented features by creating multiple instances of the RetailItem class. It begins with a default object, then prompts the user for inputs to initialize subsequent objects, integrating input validation to verify that the price and units are positive values. These inputs are captured through console prompts, with looping constructs ensuring invalid entries prompt re-entry until valid data is provided.

After creating and initializing the objects, the program displays each item's details—description, units on hand, and price—in a formatted manner. Following this, it calculates the total inventory by summing the units across all retail items, offering insight into stock levels. The total inventory count is then displayed to the user, showing the application of aggregation in object collections.

This example illustrates the practical application of classes in C++. It emphasizes the importance of encapsulation, input validation, and user interaction in developing reliable console applications. Moreover, it demonstrates how multiple objects can be managed within a program to simulate real-world inventory systems, serving as a foundational exercise in object-oriented programming.

References

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