У вашего броузера проблема в совместимости с HTML5
In this video, i will show you how to download the MinGW installer, to install the C(gcc) and C++(g++) compilers for windows.
I will also show, how to set up the environment variable to enable your system for compiling C and C++ programs.
Mac users needs to download Xcode from the Mac-Appstore, which will set up everything for compiling C and C++ programs.
Link to download MinGW : https://osdn.net/projects/mingw/releases/