协调类，继承和C回调

In my C++ project, I've chosen to use a C library. In my zeal to have a well-abstracted and simple design, I've ended up doing a bit of a kludge. Part of my design requirement is that I can easily support multiple APIs and libraries for a given task (due, primarily, to my requirement for cross-platform support). So, I chose to create an abstract base class which would uniformly handle a given selection of libraries.In my C++ project, I've chosen to use a C libra