This is a comprehensive Library Management System implemented in C++ that supports book management, student borrowing records, and persistent storage through file I/O operations.

• Book Management: Add, remove, search, and display books
• Borrowing System: Track who borrowed which books
• Student Records: Maintain student information associated with borrowed books
• Admin Panel: Secured with password protection for administrative tasks
• Persistent Storage: Data saved to files for retrieval between sessions
• Efficient Lookups: Uses hash-based data structures for O(1) book retrieval

1. Compile the code using a C++ compiler (e.g., g++).
2. Run the executable.
3. Use the main menu to select options:
   • 1 for Borrowing a Book
   • 2 for Returning a Book
   • 3 for Viewing Borrowed Records
   • 4 for Searching for a Book
   • 5 for Admin Panel (password: "admin123")
   • 6 to Exit
4. Follow the prompts to complete your selected action.

g++ -o library_system library_system.cpp
./library_system

The system uses several key data structures and algorithms:

• Unordered Map (Hash Table): For O(1) book lookup by ID
• Vectors: For storing and managing borrow records
• Sorting Algorithm: Used to display books in order by ID
• String Search: Implemented for finding books by title keywords

• Constant-time O(1) lookups for books by their unique ID
• Efficient insertion and deletion operations
• Perfect for library systems where quick access by book ID is essential

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*                                      *
*      WELCOME TO THE LIBRARY SYSTEM   *
*                                      *
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Contact: ayushjadaun6@gmail.com | 9548999129

MAIN MENU:
1. Borrow a Book
2. Return a Book
3. View Borrowed Book Records
4. Search for a Book by Title
5. Admin Panel
6. Exit
Enter your choice: 1

Available Books in Library:
1. The Kite Runner by Khaled Hosseini (ID: 101)
2. To Kill A Mockingbird by Harper Lee (ID: 102)
3. The Alchemist by Paulo Coelho (ID: 103)
4. Pride And Prejudice by Jane Austen (ID: 104)
5. A Tale Of Two Cities by Charles Dickens (ID: 105)

Enter the Book ID to borrow: 103
Enter your name: John Doe
Enter your email: john@example.com

Book borrowed successfully!

• Book: Represents a book with ID, title, and author
• BookManager: Handles all book-related operations
• BorrowRecord: Represents a borrowed book and borrower details
• StudentManager: Manages student borrowing records
• LibrarySystem: Main interface class integrating all components

The system uses two main files for persistence:

• books.txt: Stores all available books
• borrow_records.txt: Stores all active borrowing records

Each record is stored in a pipe-delimited format for easy parsing.

I created this project during my early programming days and recently rediscovered it while going through old files. I never uploaded it to GitHub at the time as I wasn't familiar with Git version control, but I'm sharing it now as a memento of my programming journey.

While there are certainly improvements I would make now with more experience, this project represents an important milestone in my learning process.

• Implement a graphical user interface
• Use a relational database instead of text files
• Add due dates and overdue notifications
• Implement more advanced search capabilities
• Add unit tests for reliability
• Apply design patterns for better code organization

This project is open-source. Feel free to modify and improve it!