Library_Management_System

This is a simple implementation of a Library Management System (LMS) using C++. The program allows users to manage a collection of books by performing various operations such as entering book data, editing book information, deleting books, searching for books, and displaying the book collection.

Class Structure

class Node

This class represents a node in the doubly linked list that holds information about a book. Each node has four private data members:

• string author: Represents the author's name of the book.

• string title: Represents the title of the book.

• string publication: Represents the publication of the book.

• string book_id: Represents the unique identifier (ID) of the book. Additionally, it has two private pointers:

• Node* next: Points to the next node in the linked list.

• Node* pre: Points to the previous node in the linked list. The class provides two constructors:

• Node(): Default constructor.

• Node(string auth, string tit, string pub, string book): Parameterized constructor to initialize the data members. The class LMS (Library Management System) is a friend of the Node class, which means it can access the private members of the Node class.

class LMS

This class represents the Library Management System and manages the collection of books using a doubly linked list. It contains the following private data members:

• Node* head: A pointer to the first node of the doubly linked list. It represents the head of the linked list.

• fstream File: An fstream object used for file input/output to store book records. The class provides several member functions to perform different operations on the collection of books:

• void menu(): Displays the main menu and handles user input for various operations.

• void Search(): Allows the user to search for books either by book ID or book title.

• bool Del(): Handles the deletion of book records.

• void Delete(): Deletes book records from the collection.

• void EditRecord(): Allows the user to edit the information of a book.

• void LLtoFile(): Writes the data from the linked list to the file.

• void EnterData(): Allows the user to enter new book data and adds it to the linked list.

• void FiletoLL(): Reads data from the file into the linked list.

• void Display(): Displays the entire collection of books. Additionally, the class has a main function to create an object of the LMS class and start the Library Management System by calling the menu() method.

The LMS class uses the Node class to store and manage the book records in a doubly linked list. The doubly linked list allows efficient traversal of the book records in both forward and backward directions. The fstream object is used to interact with a file ("LMS.txt") for persistent storage of the book records between different program runs.

Features

• Add new books to the collection with details like author name, book title, publication, and book ID.
• Edit existing book information, including author name, title, publication, and book ID.
• Delete books from the collection either by book ID or book title.
• Search for books in the collection based on book ID or book title.
• Display the entire book collection.

How to Use

• When you run the program, it will display a menu with various options.
• Choose an option from the menu to perform the corresponding operation.
• To enter book data, select option 1 and provide the required information.
• To edit book information, select option 2, and follow the instructions to choose a book for editing and update its details.
• To delete books, select option 3, and follow the instructions to delete specific books or clear the entire collection.
• To search for books, select option 4, and follow the instructions to search by book ID or book title.
• To display all the books in the collection, select option 5.

File Persistence

The program uses file I/O to store the book records in the file named "LMS.txt". The data is saved to the file whenever a new book is added, book information is edited, or a book is deleted. On program startup, it loads the data from the file into the linked list.

Contributing

Contributions are welcome! If you find any issues or have suggestions for improvements, feel free to open an issue or submit a pull request.