Practical Skills of c language: processing of excel Data Tables in pure c; practical skills in excel

Practical Skills of c language: processing of excel Data Tables in pure c; practical skills in excel
Requirement

You need to process a large amount of data in the database. The exported files in the database are xls (excel Format before 2003). You need to separate the factory items, for example:

Implementation Principle

Pure c can read excel by byte according to fixed separation, but this requirement can output txt, so the implementation method is as follows:

Excel source file (more than 10000 rows of tables)

Input File: in.txt File

Temporary File temp.txt

Output out.txt File