Linux C/C++ IDE

Good evening,

been using Geany under Ubuntu since I started studying Business Informatics. Now being in the second semester our classes changed from C to C++ and I found that Geany isn't so good for C++ because it lacks a decent auto-completion (e.g. member functions of STL are not shown).
Does anyone know a light IDE with decent auto completion?

Autocompletion is cute and all, but what about jumping to variable/function declarations/implementations? What vim plugin do I use for that? Also, any good plugin for searching? (fuck grep) Say maybe I want to see all occurrences of "myFuckingMethod" in all the files in my project, and then also be able to jump to the results easily.