Code completion C/C++ on Aptana doesn't work

I'm using aptana studio 3 with C code and when I'm writting an acces to an structure it sugg开发者_Python百科ests in each position what variables I can use, but for simple variables it doesn't suggests anything without press control+space.

Any idea how to change that?

Aptana Studio doesn't include code completion for C/C++ by default. I would suggest you'll need to contact the plugin authors for C/C++ with that question.