Interactive coding platform for newbies

[Balux]

Dear all!

I am currently reading C++ codes that I find difficult to fully understand.
What I am looking for is a simple text editor/helper with the following functions:

When I move to a text in a code it displays
- what is it (function/class/variable etc.)
- how it should be parametrized
- where was it defined e.g. offers a link to its source code like e.g. to '#include''-d packages to be able to quickly check its properties
- also it could help interactively correcting coding issues

In Matlab e.g. similar function exists and that I find a huge help, even that I am using Matlab for years...

Background:

During university (8years ago :o) I did some physics simulation in C# but right now I would need to understand and modify codes written in C++.
(e.g.:http://www.palabos.org/documentation/tutorial/first-steps.html#tutorial-1-first-steps-with-palabos)

To recap my knowledge I have just read this tutorial that was pretty helpful! http://www.cplusplus.com/doc/tutorial/

I am looking for the above-mentioned solution in order to quicken my learning curve.
Maybe I am just missing a buzzword.
Maybe it is non-existing...

Partial solutions are also welcome! :)

Thanks for your help in advance!

Bálint

ps. I am using Ubuntu.