`.cls` and `.sty` files merging to create an appendix

Question

I have a .tex file, actually it is from a certain layout of my university, and it comes with a .cls file of its own. And now I have to create an appendix section contains only some Matlab codes. I have found an example latex code for Matlab code and as I guessed there is a .sty file with it. Unfortunately as they have different document class, I could not merge them together. For example, in the .sty file the coder has defined \lstdefinelanguage{matlabfloz}, and in my main.tex file coud not recognize it.

Here is my question, do I have to define that language in the .cls file? Or there is some easier way without doing that?

(I tried to use \inputpdf command, I do not have any error message afterwards, but it does not appear in compiled pdf which is I did not understand.)

\documentclass{article} 
\usepackage[framed,numbered,autolinebreaks,useliterate]{mcode} 
\appendix 
\begin{document} 
\begin{lstlisting} 
for i = 1:3 
  if i >= 5 && a ~= b % literate programming replacement disp('cool'); % comment with some §\mcommentfont\LaTeX in it: $\mcommentfont\pi x^2$§ end [:,ind] = max(vec); 
  x_last = x(1,end) - 1; 
  v(end); 
  really really long really really long really really long really really long really really long line % blaaaaaaaa ylabel('Voltage (µV)'); 
end 
\end{lstlisting} 
\end{document}