How are cross-platform games written in C++?

Question

Mobile development

Good afternoon. I wondered about the possibility of writing a game in C ++ that would run on Android, iOS, Window. I heard about the workload for VS, but as I understand it, this is just the ability to write natives, or write my own engine on top, which I probably won’t pull.
I tried Java with LibGDX, C# with Monogame (and poked Unity), but now I have a desire to try to do something on the pluses.
So, if you were to set yourself such a task, where would you start?
Thank you.

Answer 1

With Qt https://www.qt.io/.

Answer 2

Why C++? As a rule, C ++ is used as the basis for the low-level part of the engine, and all logic is written in something simpler.
If it is a matter of multiplatform and everything is done from scratch, then some ready-made and well-known engine is better suited. The same UE or Unity.
If you really want C++, then look, for example, at https://github.com/mosra/magnum

Answer 3

If you are not afraid of the angelic - take a look at https://cocos2d-x.org/download
Now I am just rebuilding the program for iOS, updated for Android.
Desktop ports are also there.
But this is in case you have a toy with graphics and a minimum of GUI.
It is better to do GUI applications on Qt, the toolkit is noticeably richer there.