FYI

that is not Arduino code... that's regular C on an AVR chip...

hello
I'm one of the creators of Arduino.

The language is c++, we just hide a couple of the most "scary" elements to beginners (mostly the includes at the beginning of the code)

anything you write after that is c/c++

"They essentially defined their entire language in a couple of pages." actually a lot of people would find this appealing...

if you don't like the IDE you can use a makefile to compile the code

m