inserting c code in beamer presentation

[nikunj .]

Hi,

How do we insert c code in lyx beamer presentation?
I am trying to use package listings.

I try the following:

\begin{lstlisting}
union mix_t {
  long l;
  struct {
    short hi;
    short lo;
    } s;
  char c[4];
} mix;
\end{lstlisting}

but I get an error "\begin{lstlistings} ends by \end{bea...@frames!"

Kindly suggest.

Nikunj.