\section{STRSTR String Search Function}

\subsection{Usage}

Searches for the first occurance of one string inside another.
The general syntax for its use is
\begin{verbatim}
   p = strstr(x,y)
\end{verbatim}
where \verb|x| and \verb|y| are two strings.  The returned integer \verb|p|
indicates the index into the string \verb|x| where the substring \verb|y|
occurs.  If no instance of \verb|y| is found, then \verb|p| is set to
zero.
\subsection{Example}

Some examples of \verb|strstr| in action
\begin{verbatim}
--> strstr('hello','lo')

ans = 

 4 

--> strstr('quick brown fox','own')

ans = 

 9 

--> strstr('free stuff','lunch')

ans = 

 0 


\end{verbatim}
