Eclipse CDT (for C++/C development) how to invoke content assist automatically while typing

Question

Eclipse CDT (for C++/C development) how to invoke content assist automatically while typing like in Visual Assist for Visual Studio. In other words how to give triggers as all k

Answer 1

ctrl+Space can work well. but configure as auto-complete just like emacs auto-complete or vim youcompleteme, when typing words will invoke proposal, no way.