Introduction - If you have any usage issues, please Google them yourself
Since the C language in operating system is not very convenient, so most of the data storage are carried out through the document. Data storage used to achieve the three documents. Procedures when the first run will be automatically created in the directory. BOOK.DAK, for the preservation of book information MEMBER. DAT, for the preservation of Member information TRANS. DAT, for the preservation of business information, that is the end of book information.