Blender is a free and open-source 3D graphics production suite. It is primarily suitable for making interactive real-time content. This amazing game engine is purely written in C/C++ from scratch.
Blend4Web is an open source 3D graphic software framework. The main advantage of the framework is that it works right within the browser without installing any third party plugins. It can render both graphics as well as audio inside the browser window.
C Standard Library provides two different methods to generate random numbers. They are: rand() and srand().