A simple library system written in C to manage books, customers and rented books. The system writes the information to text files.

• Customer Management: Add new customers.

• Book Management: Add new books.

• Rental Management: Record and manage book rentals.

• Data Storage: Information is stored in text files.

• Library System.c: Main source code file for the library system.

• customers.txt: Stores customer information.

• books.txt: Stores book information.

• rented.txt: Stores rental information.

To compile the program, use a C compiler like gcc:

gcc -o library\_system Library\\ System.c

or use CLion IDE by JetBrains

Run the compiled executable:

./library\_system

Customer Management

• void createNewCustomer(): Adds a new customer to the customers.txt file.

Book Management

• void addNewBook(): Adds a new book to the books.txt file.

Rental Management

• void rentBook(): Records a new rental in the rented.txt file.

struct Customer

• int C_ID : Customer ID.

• char name[25]: Customer's first name.

• char surname[25]: Customer's last name.

• int age: Customer's age.

• int wallet: Amount in customer's wallet.

struct Books

• int B_ID: Book ID.

• char name[35]: Book name.

• char author[25]: Author's name.

• int age_limit: Age limit for renting the book.

• int price_per_week: Price per week for renting the book.

• int rented: Rental status (0 for available, 1 for rented).

struct Rented

• int R_ID: Rental ID.

• int C_ID: Customer ID.

• int B_ID: Book ID.

• char rented_date[12]: Rental date.

• int week: Number of weeks rented.

• Ensure that the data files (customers.txt, books.txt, rented.txt) exist in the same directory as the executable. If the files do not exist, the program will attempt to create them.

• The program uses standard input (stdin) for receiving user inputs. Make sure to provide valid data to avoid unexpected behaviour.

Contributions are welcome! Please fork this repository and submit pull requests for any features, bug fixes, or improvements.