China DOS Union

What I need to program now is this: find and process files with the same name under different directories. I couldn't find a function in C's function library that can search for files including subdirectories.
C++ is fine too. Could one of the experts help me out? Thanks!

I remember that people usually use the principle of recursion to search the disk directory tree, and the results are quite good. You can use that for reference.

Also, please note that this thread should be posted in the "DOS Development and Programming" section. And another thing, the title of your post doesn't really fit the topic. I hope everyone will correct this in the future. Please don't think we're being long-winded, thanks for your cooperation!