My name is David. We've created several years ago the site browxy to run and compile java code. Now after many years of work we released a new version that can run and compile C,C++ and other languages in this address: http://www.beta.browxy.com
The site does not need registration to run and compile code and works also with interactive programs.
I hope it will be useful, the objective of the site is to make very easy to create and run all types of programs. Here is a video example that shows how easy is to paste and run code -> https://www.youtube.com/watch?v=mXjDJCFcBms