Where to get g++?

Anjuta under Gnome is very good.

http://en.wikipedia.org/wiki/Anjuta

Or KDevelop under KDE.
http://en.wikipedia.org/wiki/KDevelop

And here, mutch DevelopKids too:
http://en.wikipedia.org/wiki/Category:Integrated_development_environments

g++:
http://en.wikipedia.org/wiki/GNU_Compiler_Collection

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Do you setting a link, here read for more:
http://www.blitzbasic.com/Community/posts.php?topic=55037