nOOb question, probably not my last

[TED FISCHER]

I installed kdevelop from the repos, and I wanted to do the kde tutorials "hello world" I save it as main.cpp in my home folder. But then I run the command given for g++ it says it can't find any of the commands called in the program? What else do I have to do to get gcc to compile it? Do I need to save it in another folder?

Thank you for your help

Ted