[newbie] Is g++ and gcc the same compiler???

[Eric L. Damron]

I want to install the K-Development package.  The instructions say that I
need g++ 2.7.2/g++ 2.8.1/egcs 1.1 (or compatible), available at
http://www.gnu.org.

I went out to the sight but didn't find g++.  I found gcc which is also a
C++ compiler but is it the same compiler??

How can I tell if I already have g++ 2.7.2 on my system?

Thanks