cm">
The storage space for the parsed argument values should <U>not</U> be
initialised since the user may have deliberately set default values
that should be retained.</P>
<H4>int scanfn(void *parent, const char *argval)</H4>
<P STYLE="margin-bottom: 0.51cm">The parser calls an <I>arg_xxx</I>'s
scanfn routine once for each matching command line argument that
needs to be parsed. Its purpose is to extract the argument's data
value from the argument string in <I>argval</I>, convert it to the
appropriate data t