📚 Library Management System (C Program)

📌 Overview

This is a Library Management System written in C that allows users to manage book records efficiently using linked lists. It provides functionalities to add, delete, search, update, and display books using their ISBN numbers. Books are categorized alphabetically, and the system supports persistent storage using a file.

🚀 Features

• ✅ Add Books – Insert new books and handle duplicate ISBNs by increasing copy count.
• ✅ Delete Books – Remove books from the library using ISBN.
• ✅ Search Books – Find books quickly using their ISBN.
• ✅ Update Book Names – Modify book titles while keeping alphabetical organization.
• ✅ Display Library – Show all books grouped by their starting letter.
• ✅ Persistent Storage – Save and load books from library.txt for data retention.

🏗️ Project Structure

📂 Library-Management-System/
│── 📜 library.h # Header file containing struct definitions & function prototypes
│── 📜 library.c # Implementation of library management functions
│── 📜 main.c # Main program with user interface logic
│── 📜 library.txt # Data file storing book records (generated at runtime)
│── 📜 README.md # Project documentation

Shell

🛠️ Compilation & Execution (Linux/WSL)

🔨 Compile the program:

gcc library.c main.c cases.c -o library `pkg-config --cflags --libs gtk+-3.0`

Run the Program

./library

How to use?

+------------------------------------------------+ 
|        Welcome to Axis Library System          | 
+------------------------------------------------+ 
| 1. Add Book                                    | 
| 2. Delete Book                                 | 
| 3. Search ISBN number                          | 
| 4. Update Book Name using ISBN                 | 
| 5. Save to library file                        | 
| 6. Display Library                             | 
| 7. Quit                                        | 
+------------------------------------------------+ 

🎯 Functionality of Each Option

1️⃣ Add Book – Allows the user to insert a new book by entering the ISBN number and book name. If the book already exists, the number of copies is incremented instead.
2️⃣ Delete Book – Removes a book from the system based on the ISBN number. If the book is found, it gets deleted; otherwise, an error message is displayed.
3️⃣ Search ISBN Number – Lets the user search for a book using its ISBN. If found, the book's name is displayed; otherwise, an error message is shown.
4️⃣ Update Book Name Using ISBN – Updates the title of an existing book while ensuring it remains in the correct alphabetical category.
5️⃣ Save to Library File – Saves all book records into library.txt, ensuring data persistence even after the program is closed.
6️⃣ Display Library – Displays the entire book collection, organized alphabetically by the first letter of the book name.
7️⃣ Quit – Exits the program after saving all book records to prevent data loss.

Future Enhancements (Ideas 💡)

--> Borrow & Return System – Track issued books.
--> User Accounts – Implement a login system.
--> GUI Interface – A simple graphical frontend for better usability.

Why This Project?

This project demonstrates data structures (linked lists & hashmaps), file handling, and modular programming in C. It's designed to be lightweight, efficient, and extendable.

Open-Source License 🚀

This project is open-source under the MIT License. That means you are free to use, modify, and distribute this software however you like!

Feel free to:
✅ Use it in your own projects
✅ Modify it to fit your needs
✅ Share it with others

Just make sure to include the original license and credit where due.

Legal Stuff

This software is provided "as is," without any guarantees. I’m not responsible for any issues that may arise from using it. Use at your own risk!