Implementation of book borrowing management system based on C language

1. Demand analysis

• The target problem is described below
• requirement ： Design library management system , Realize the management of books and their borrowing functions . At the same time, according to the user ( Teachers' , Student ) Different provides different functions .

2. overall design

The document structure of this project is shown in the figure below

The detailed explanation is as follows

• File.h File reading and writing module
• GLOBAL.h Global variables and macro definition module
• init.h Program main loop module
• List.h Book linked list module
• User.h User function module
• userlist.h User linked list module
• Date.h Time module

The operation flow chart is roughly as follows ：

• Initialize various parameters and books , Student information file ( When starting for the first time, create )
• Enter the main part of the program
• The program is divided into three states
  • Visitor status
  • Student status
  • Administrator status
• Each state corresponds to different functions and permissions , You can switch freely in these login modes
• Choose different functions according to the prompts , The query , The return , Borrow , A series of operations such as adding and deleting
• Exit procedure , Save the file

3. Detailed design

See the functions of each function module for details , There are complete notes and instructions

4. System test and analysis

The screenshot of the test process is as follows ：

Program initialization interface

Student interface

Borrow books

View personal information

Return books

Administrator interface

Add books

Save the data

The contents of the document

Ps: We also designed many functions , For example, student registration , Login needs to verify the password and other realistic functions , Please explore more XD. There are no students when entering the program for the first time , Need to register . The administrator has only set one ,ID by 1, The password for ：123456. in addition , You need to perform “ Exit procedure ” To save all files , Forcing the program to close will lose data .