There are two problems with that question:
The asker didn't include much in the way of context. We don't know where that code came from, how it was called, which platform it was found running on, or why the asker wants to decompile it. Not only does this make answering the question unnecessarily difficult, but it also makes the question less useful as an opportunity to teach, because...
The asker gave no indication of what he already knows and where he's running into trouble putting that knowledge to use.
Consider a hypothetical answerer who wishes to use this question as an opportunity to share his knowledge and experience. He must not only explain to the asker how to represent the logic presented in C, but also (if he wishes to be thorough) how to divine the nature of the compiler that produced the code in the first place. At which point he still can't know if his answer will actually be of use to the asker, since we don't know if the asker knows anything about i386 assembler or the process by which high-level languages are represented in it... So he would have to explain those as well.
At this point, a fairly simple-looking question has become quite broad and time-consuming to answer. But let's say someone did put the time and effort into answering it... What are the chances that this textbook-sized answer is going to benefit anyone else? Well, pretty good if they could find it... But it's trapped under a very specific question with a fairly nondescript title, so first those would have to be edited to generalize the question. Even more work...
And what happens if the asker comes back and says he already knew all of this and was just stuck on one small part of the code he listed, and edits his question to be more specific. Now all that effort is wasted on him.
Over on English Language & Usage, J.R. came up with a reasonable simple formula for asking questions like these:
- Let me explain why I'm asking this question.
- Let me ask the question.
- Let me tell you what I found when I tried to find the answer myself.
- Let me explain why I'm still confused.
Not that every question explicitly states all of this information, but I would argue that every good question contains this information at least implicitly - and if you find yourself struggling to understand the purpose of a question, looking for these factors is a good exercise. If you strongly suspect that the question falls into the trap I've outlined above (possibly too broad with no way to be sure) leave a comment noting the information that is missing and vote to close it. There's even a specific off-topic sub-reason defined for this purpose:
Questions asking for help reverse-engineering a specific system are off-topic unless they demonstrate an understanding of the concepts involved and clearly identify a specific problem.
If the asker comes back and clarifies, you can retract your vote or vote to re-open. But failing that, it would be better to help those answering focus their efforts on questions that can already be answered effectively.