No. It's BoostC.
If you are new to C & interested to learn it quickly, see this link..http://forum.sourceboost.com/index.php?showtopic=2399. C is more structured & universal language. I migrated to C recently & its power is awsome as regards to microcontroller programming. If you intend to impliment rtos on small ram pics, that too is available called nova rtos. Have a try.
Regards

Raghunathan.