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For C and C++ languages syntax error highlighting should be supported (like for Java files)
Have you tried loading the C/C++ module? You should find it in the plug-in manager which you will find under the tools menu.
The issue is about syntax *error* highlighting, not just syntax highlighting (colouring). What do you mean by C/C++ module? Usual Netbeans C/C++ support? It does not yet provide syntax *error* highlighting. I developed a separate plugin for this purpose: http://plugins.netbeans.org/PluginPortal/faces/PluginDetailPage.jsp?pluginid=6601 But it isn't yet in the official cnd, sorry, official NetBeans. I hope it will be included some time. Than I'll close this issue as fixed.
The plug-in looks interesting. I should point out that I'm only a developer that uses NetBeans and not a member of the C/C++ team. You could try asking a question about future plans on the nbdev@netbeans.org or users@cnd.netbeans.org mailing lists.
*** This issue has been marked as a duplicate of 87684 ***