This prog is to fetch the ptt's content based on the board name like car

bbs_crawler_public.exe [OPTIONS] ptt's board_name index_number

You can use bbs_crawler to figure out how many index page the PTT board is by "fetch_index" option and fetch the post page against each index by "fetch_page" plus the designated end of index to iterate from index 1 to yours designation.

example: if you install python already, run bbs_crawler_public.py with fetch_index plus ptt's board name like the following
$python bbs_crawler_public.py -c fetch_index car

or

run bbs_crawler_public.py with fetch_page plus the designated end of index number like the following - iterate from index 1 to index 6 $python bbs_crawler_public.py -c fetch_page car 6

if you do not install python and use Windows OS, use bbs_crawler_public.exe instead of bbs_crawler_public.py to run the examples above

For more info, there's the blog in Chinese explain what and how it works. 抓取批踢踢 (Ptt) post文的crawler實作 - http://paulyang0125.blogspot.com/2014/08/ptt-postcrawler.html