Introduction - If you have any usage issues, please Google them yourself
Del_sn_temp recursively delete all files in a folder
Rereaddata is equivalent to read a file to it with a comma (when making a template, the template in the C file need to be separated by commas, if the file to be separated by space, need to add a comma)
Read_sample_all read a folder under the template (both a character template) to take the average of its 0.1~0.9 range
And then write the letter template files need to adjust their own slightly