Not if you want them running in people’s browsers.
I started with C and C++, and their syntax is quite close to JS. Lots of snippets can be literally pasted from C++ to JS, maybe replacing “int” and “float” with “var”.
Here’s a couple Codepens I did in the past few days, that are intended to be fairly clean, relatively simple code that others can reuse (@Essenzia has already been building upon of of them and extending it quite successfully, but I don’t think he’s posted his latest) But there is also a certain “quick and dirty” nature to them. As time goes on though, we can have libraries of JS code hosted at the site that can be embedded, and can allow doing common stuff easily.
These aren’t particularly graphical, but graphics is my wheelhouse, so future ones I work on most certainly will be.
We can certainly provide links to your C++ repos, but I would suggest not overestimating people’s willingness to download and compile your code, compared to just having something that they can be run on the web immediately, and can edit the code right there if they want.
If you do continue to build stuff in C++, and it is graphical, I would suggest doing screencast type videos and put them with youtube. NodeBB allows embedding YouTube videos as well. This is also something I have a lot of experience with.