> Hi, at first time, I stored the files information by reading different directories. For example there are 2 directories provided by command line, and the I allocate two chunck of memories to store information of files included in the directory. > However, when doing the step "identify exit only or files with same filenames", I found it is difficult to search by filename (especially when have 2+ directories) > So, I was wondering can I store files in a hash table( inspired by lecture 19), which is an array of list, each list have the files with same filenames and same relative location. > And because I am not yet doing recursive (-r) option, so I am not sure, this structure is easy for recursion, becuase in recursion situation (not figure out yet) how to identify the files in same relative location. Thank you.