title: How to get list of files with a specific extension in a given folder?
body: <p>I want to get the file names of all files that have a specific extension in a given folder (and recursively, its subfolders).  That is, the file name (and extension), not the full file path.  This is incredibly simple in languages like Python, but I'm not familiar with the constructs for this in C++.   How can it be done?</p>