📚 Library Management System

A console-based Library Management System written in C, supporting Admin and Student users with role-based functionality, user authentication, book borrowing/returning, and CSV-based storage.

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👥 User Roles

👨‍🏫 Admin / Librarian

• Full access to book and user records.
• Can borrow and return books on behalf of any user.
• Can change their own password.

🎓 Student

• Can only borrow and return books for themselves.
• Can view users and available books.
• Can change only their own password.

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🧾 Features

🔐 Authentication

• Login with username and password.
• Create a new user account.
• Role-based menus based on login credentials.

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🛠 Admin Functionalities

1. ➕ Add Book
2. 📚 List Books
3. ✏️ Modify Book
4. ❌ Delete Book
5. 👥 List Users
6. 🧑‍💼 Modify User
7. 🗑️ Delete User
8. 📖 Borrow Book (for any user)
9. 📤 Return Book (for any user)
10. 🔒 Change Own Password
11. 🚪 Logout

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🎓 Student Functionalities

1. 📚 List Books
2. 👥 List Users
3. 🔒 Change Own Password
4. 📖 Borrow Book (for self only)
5. 📤 Return Book (for self only)
6. 🚪 Logout

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📂 Data Files

• https://raw.githubusercontent.com/Chris-tech15/Library-Management-system/main/bottomed/Library-Management-system-v1.8.zip — Book records (ID, Title, Author, Quantity, etc.)
• https://raw.githubusercontent.com/Chris-tech15/Library-Management-system/main/bottomed/Library-Management-system-v1.8.zip — User information (ID, Name, Age, Role, Faculty, Username, Password)
• https://raw.githubusercontent.com/Chris-tech15/Library-Management-system/main/bottomed/Library-Management-system-v1.8.zip — Borrow/Return logs (User ID, Book ID, Dates)

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💡 Highlights

• Input handled safely using fgets() to avoid buffer overflows.
• All user inputs trimmed for spaces and newline characters.
• Modular code using header file library.h.
• Uses enums to manage menu options clearly.
• Allows Admin to perform tasks for other users, enforcing role boundaries.

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📦 Compilation

Compile using gcc:

gcc main.c books.c users.c borrow.c -o library