I don't get exactly what you mean, but the Arduino and Pi are totally different animals with AFAIK no commonality between them at the software development level, any more than there is between an Arduino and a Windows 8 PC or for that matter a UNIVAC.
That said you can program both in C/C++, just using different dev environments.
OTOH if you want to develop FOR the Arduino on the Pi, that may be possible as the IDE runs under Linux I think.
Rob