Assignment 4: Folder And Filename Functions

Asmt4 Foudahrbrequire Filedirname File Functs Foudah

This assignment involves developing a Ruby-based Student Database application. The core functionality includes creating, reading, updating, deleting, and displaying student records stored in a text file. The application should prompt the user for a database filename during startup, load existing records if the file exists, or create a new one otherwise. The program should provide a menu-driven interface for managing student data, with options to add new records, edit existing ones, remove records, display stored data, and quit while optionally saving the current state. The implementation must include a main class managing file operations and user interactions, along with a module defining functions for record management. The program needs to handle input validation, ensure data integrity, and format output for readability. Proper modular design, error handling, and adherence to Ruby best practices are critical for this assignment.

Paper For Above instruction

The objective of this assignment is to develop a Ruby-based student management system that allows users to perform CRUD (Create, Read, Update, Delete) operations on student records stored in a text file. The design includes a main class responsible for file handling and user interface logic, and a module encapsulating functions to manipulate student data. The project emphasizes modular programming, user input validation, data persistence, and system robustness.

The primary class, `StudentDB`, initializes by prompting the user for a filename. If the file exists, it loads records into an internal hash where keys are student IDs, and values are concatenated strings representing student details like last name, first name, major, and year. If the file does not exist, it creates a new file, preparing for future record additions. The class provides a `quit_program` method that, upon user confirmation, saves all records back to the file, overwriting previous data.

The application interface offers a menu-driven loop that continues until the user opts to quit. Choices include adding a new record, editing an existing record, removing a record, displaying all records, or quitting. Each choice invokes corresponding methods from the `Functs_Foudah` module, which contains functions for managing the student data.

Adding a new record prompts the user for a student ID, ensuring no duplicate IDs exist. It then requests input for last name, first name, major, and catalog year, concatenates these with commas, and stores them in the hash. Editing a record asks for a student ID, verifies its existence, then collects updated values for each student attribute, overwriting the previous data. Deletion confirms the presence of the student ID before removing the record from the hash.

The display function formats and outputs all student records in a tabular form, with headers indicating ID, Last Name, First Name, Major, and Year. The implementation emphasizes clean, readable output, proper alignment, and comprehensive display of stored data.

Throughout the program, error handling ensures smooth operation even with invalid inputs, non-existent IDs, or file issues. Modular design with a dedicated functions module enhances maintainability and code reuse. Overall, this assignment demonstrates proficiency in file I/O, data structures, user interaction, and Ruby programming principles.

References

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