I see a plenty of questions that post pure C code and are tagged C++ or C and C++. Let's just assume that nothing in the content implies anything C++-related. And just being compiled by a C++ compiler instead of C changes nothing.
I edited a few by removing the C++ tag and add C if not already there, as it seemed like the proper thing.
Now I'm getting unsure, so better ask whether it is desired or not. (having 3k+ reputation makes those edit just happen without review... guess the author gets an alert and can roll back, still I'd welcome confirmation to either way.)