I'm just getting into advanced C++ programming (object orientation), and I've been looking for hours on how to embed a C++ program into your average browser. I honestly have no idea how. I was thinking the same way you embed JavaScript with HTML using the script type tag. Can someone help me understand how to do this?
Unless you're using Chrome + Native client, you can forget about it...
There are many, many average browsers on the market out today, including mobile browsers which can't execute C++ code for variety of reasons.
So, I'd recommend staying with the usual suspects: Javascript and HTML 5 if you want to be standards compliant.
I strongly discourage using ActiveX, unless you're developing for a company intranet and all browsers in the company are IE 6. I hope you aren't in that scenario. Even then, I'd suggest staying away from ActiveX.