gram</A> </h2>

<p> Defining a flag is easy: just use the appropriate macro for the
type you want the flag to be, as defined at the bottom of
<code>gflags/gflags.h</code>.  Here's an example file,
<code>foo.cc</code>:</p>

<pre>
   #include &lt;gflags/gflags.h&gt;

   DEFINE_bool(big_menu, true, "Include 'advanced' options in the menu listing");
   DEFINE_string(languages, "english,french,german",
                 "comma-separated list of languages to offer in the 'lang' menu");
</pre>

<p><code>DEFINE_bool