How can I program a 3d shooting games

Answer 1

As your profile say, you're learning c++ at the moment and c++ can be used to program anything you're also at the right place Solo learn!!; Solo learn is actually a great booster for beginners nevertheless u can always break boundaries after completing c++ on Solo learn as Solo learn covers only basics you can visit: http://www.learncpp.com or visit the official website http://www.cplusplus.com/doc/tutorial and advance your career so as to achieve your shooting game thing, hope this helps

Answer 2

Youtuber Brackeys has good videos about making all kind of games on unity, including first person shooters

https://www.youtube.com/playlist?list=PLPV2KyIb3jR5PhGqsO7G4PsbEC_Al-kPZ

Brackeys mainly uses c# but unity also supports c++. You just need to take this into account and make adjustments yourself if you are trying to replicate his tutorial and his codes