You might be embarrassed to have anyone see your code, but it's still a good idea to post code. Don't worry, no-one's here to pick on someone just because they're starting out or otherwise lacking knowledge.

• Many problems aren't where the questioner thinks, so relevant information is left out. This will cost you and the people helping you of valuable time.
• Some problems are easily recognized by inspection. No code ... no inspection! You're depriving someone of the chance to give you an immediately useful answer. Otherwise, it may take several exchanges to get the relevant information.
• Many people will skip nodes without code, as they don't want to create an example from scratch. Many times it's much easier to fix something that's already there. Additionally, many monks are interested in helping those who make an effort. If the problem's not important enough for you to give a good, clear problem statement, then why is it worth my time? There's no shortage of questions to choose from. A chunk of code goes a long way in this regard (think "sweat equity").
• Seeing your code gives a monk a general idea as to your skill level. That helps them not give advice at too high or too low a level. It also gives them the opportunity to offer advice on a particular concept that you're not clear on, or show you an interesting coding technique that could save you time.