I recently started trying to learn some basic C/C++. My usual initial step in setting up an environment for a new language is to google "intellij plugin for X", so I was very disappointed to find that C/C++ is very poorly supported with respect to most other mainstream languages.
I ended up having to go with Visual Studio, which is also impressive, but there are features I miss coming from the Jetbrains world.
Additionally, they have an interesting blog post here describing whether they are an IDE or editor here:
http://blog.slickedit.com/2007/08/editor-or-ide/
tl;dr SlickEdit has no built in compiler or debugger. It's other IDE level support is fantastic though and it was perfect for embedded development work where you're building from the command line (Which you can connect to the SlickEdit Project) and debugging using GDB.
Visual Studio + ReSharper is awesome for C#, IntelliJ is awesome for Java. For C++ you're pretty much screwed.