This paper mainly uses the file operation ability of C language to design and develop a small management information system, which has at least the following functions: book storage, query and statistics by title, publisher, price and author. The user interface should conform to the general habits of users, and graphic or text interfaces can be designed with parameters. Book information includes: login number, title, author's name, classification number, publishing unit, publishing time, price, etc. Try to design a book information management system, which provides the following functions:

Query by title

Query by author's name

The number of fields recorded in the file is not less than 6, and there are not less than 2 categories in classified statistics.