No i have no expierience in C or C++, i am a yab developer. On Haiku Ports are patches for gambas, but nothing more:
haikuports/dev-lang/gambas/patches at master · haikuports/haikuports · GitHub
For visiual generating of playgrounds, you can use ourt Playground Editor (written in yab):
https://besly.de/index.php/en/development/playground-editor-2/dokumentation-2
Could be python a language for you on Haiku? This book have example, running on Haiku:
Book tip - development python games - Off-Topic - Haiku Community (haiku-os.org)
There is also some work on golang