How can we apply the knowledge that has been learned?Can you all make a game or an app?Will you face something like not knowing how to code to bring out a thing?
You can make whatever you want.
Games, apps, tools, whatever.
There are enough libs and APIs out there to do pretty much anything.
Sometimes developing natively on certain devices will mean you have to write in something other than C++. There are always C++ alternatives, though.