Iterate over pairs of two files in a directory

Question

I have a directory full of files named foo-1.ocf foo-2.ocf bar-1.ocf bar-2.ocf file-1.ocf file-2.ocf I want to iterate over each pair of files, if bot files exist (-1.ocf and -2.ocf). What is a good approach to do this in boost?

Answer 1

1. Obtain a sorted list of files, here's a tutorial.

2. Run through that list remembering (a) if the previous file had suffix -1 and (b) the prefix of the previous file.

3. So if current file has the same prefix as the previous, and the previous file had suffix -1, and current file has suffix -2 - then you got another pair of files.