Description: For the new processing process, the functions are described as follows:
User login: the system checks the user legally.
2. Book entry: classify the new books by category and input the basic information of these books into the computer.
Book lending: to have entered library book, teacher can borrow, and to borrow to register.
Return of books: return the books returned by the teacher to register.
Information query: the borrowing of all books, or the borrowing of a teacher.
2. System functional structure diagram
According to the data flow chart obtained from the demand analysis stage, the concept and principle of software design in software engineering are adopted and the user is charged
After negotiation, in the premise of ensuring the basic function of the system, the system must be equipped with the new business process of the system
All functions
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