Libpraktikum is a project mainly written in C++, it's free.
Just type make to compile the code.
make doc creates documentation in html and LaTeX if you have doxygen installed.
In tools/ you can find a simple example for using libpraktikum. The plot tool reads a given cassy file and plots the data. You can use the Makefile as an examaple to compile your own code with libpraktikum.