Displaying C/C++ Code Samples on XWiki page

I'm having difficulty putting C/C++ code on an XWiki page: {code} #include <stdio.h> {code} or {pre} #include <stdio.h> {/pre} both result in exception stack trace in the web page. When I try {code} \#include <stdio.h> {code} it works ok. Escaping the #include with a backslash is an acceptable workaround in the short term -- but shouldn't the {pre} or {code} tags disable the special meaning of the # character? Stephen