LibraryManagement

From Nit

pattern of saving users data in data.txt is:
+   UserName FirstName LastName PhoneNum PassWord DayLimit BookLimit regDate ToTalLatency Fine
pattern of saving books data in book.txt is:
+   Title Author FinePerDay LastBorrowDate LastReturnDate AmountOfBorrow LastReader Avaibility BookType[1:historic,2:psychology,3:novel] IsFinePaid
For Managing Admin Panel{
!  username : admin;
!  password : admin;
}