What should I do when a question keeps getting edited? [duplicate]

Question

Possible Duplicate:
Exit strategies for “chameleon questions”

I had a guy whom I answered, but after that he simply edited his question to a completely different question. (he had one compiler error, I basically fixed it, and then he had another one, and he deleted the first question part completely out of it)

I risk losing rep because people see my "old" answer and think I'm retarded because the answer is seemingly totally unrelated. There has to be some way to stop that kind of behaviour? But if I report such a question, would it get deleted or just reset to its original state?(preferred!)

Answer 1

If the OP doesn't seem to understand that he/she can post a new question, you might post a comment explaining this, and roll back their change (if you can). You can flag for moderator help if this isn't doing the trick.

Note that it is perfectly OK for the OP to edit to clarify. If you understood the question to be something different because the OP didn't explain it right, then you might want to simply delete your answer.

Answer 2

I generally post a link to the revision that I answered, then try to update my answer to match the current question. I've encountered this a few times and found it kind of frustrating.

Lets say this is your original answer:

You decrement foo by 10.

And then the question completely changes scope and meaning. Your revised answer might look like this:

You decrement foo by 10.

Edit

This answer addressed [this version] of the question which has since been edited. New answer below:

You increment foo by 15.

Where (of course) [this version] is a link to the version of the question that you answered.

For instance, this link leads to the original version of this, your current question. I obtained it by clicking the link right next to edited in your question, and copied the appropriate view source URL.