@Mego Yeah, I suppose that's how it would have to be done. Would be nice to have an "incorrect answer" option too, though. But it's not in the mods' power to just add the option in there, is it?
@Mego Should the other answers be flagged too? If so, which reason should be used for flagging? "Not an answer" seems to be the only flag that's relevant, but even then it really is an answer, just a slightly incorrect one.
Recently, the top answer to this question was deleted for being written in C instead of C++ as requested. Almost half of the other answers are not valid (compilable) C++ either. Shouldn't they be deleted too? Or should they all (including the deleted one) be fixed, since it is trivial to do so?
They should just use this example for Hello World: ++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<<+++++++++++++++.>.+++.------.--------.>+.>.