\begin{Verbatim}[commandchars=\\\{\}]
\PYGdefault{c+c1}{// this is a hello world program in C.}
\PYGdefault{k+kt}{int} \PYGdefault{n+nf}{main}\PYGdefault{p}{()} \PYGdefault{p}{\PYGdefaultZob{}}
  \PYGdefault{n}{printf}\PYGdefault{p}{(}\PYGdefault{l+s}{\PYGdefaultZdq{}hello, world\PYGdefaultZdq{}}\PYGdefault{p}{);}
  \PYGdefault{k}{return} \PYGdefault{l+m+mi}{0}\PYGdefault{p}{;}
\PYGdefault{p}{\PYGdefaultZcb{}}
\end{Verbatim}