After there was a misunderstanding of "C/C++ programmers" with the a non-mentioned/existing "C/C++ language", and eventually getting the question closed, I decided to void it.
I had voted to delete it, and planned to split the question in two (C language specification, compilers and their version diffs, and C++ language specs, compilers and their version diffs), but it turns out a question with (ill formed) answers can't be deleted.
That was a big turn off for my SO experience... can't reformfulate a wrongly-closed ill-answered question... ouch.