The Assimp-Lib can be used in two ways:
Linking against the pre-built libraries
Integrate the library into your project via cmake.
Both ways are descriped at Build instructions
When you’re done integrating the library into your IDE / project, you can now start using it. There are two separate interfaces by which you can access the library: a C++ interface and a C interface using flat functions. While the former is easier to handle, the latter also forms a point where other programming languages can connect to. Up to the moment, though, there are no bindings for any other language provided. Have a look at the @link usage Usage page @endlink for a detailed explanation and code examples.