I've had reasonable success with company mode and rtags for C/C++. Fairly straightforward to set up and reasonably accurate. I'd hesitate to call it streets ahead of even Xcode, let alone Visual Studio, but it does roughly what you'd hope for, without too much hassle. Definitely worth turning off company mode's complete-as-you type functionality, though...
After 9 years of using emacs, I still don't find it unambiguously better than Visual Studio for working with C/C++. The text editing is a lot better in emacs, but the code browsing/completion is not - and for large, multi-person projects I've always found the code browsing/completion functionality more important. You can always load files into emacs for one-off operations if you need to do something in particular.
After 9 years of using emacs, I still don't find it unambiguously better than Visual Studio for working with C/C++. The text editing is a lot better in emacs, but the code browsing/completion is not - and for large, multi-person projects I've always found the code browsing/completion functionality more important. You can always load files into emacs for one-off operations if you need to do something in particular.