Creating a library management system in C++ using OOPs.

File "lms.cpp" is the main source file. Run it using gcc command to run the application. File "users.txt" stores name,id,password,role of each user separated by commas in successive lines.
File "books.txt" stores title,author,isbn,publication,issued or not of each book separated by commas in successive lines.
File "userWithBooks.txt" stores what all books are with a particular user. Each line has comma separated entries where first entry is id of user and rest all in the line are book isbn number.
File "bookWithUser.txt" stores user id of user who has a particular book. It has book isbn number comma and user id in each line.