rg_rex</FONT></I>
argument structures (<FONT FACE="Bitstream Vera Serif"><I>cmd1</I>,
<I>cmd2</I>, <I>cmd3</I></FONT>) and these will return a count of 0
if the keyword was missing from the command line and 1 otherwise.
Thus we can test the presence of each keyword by checking the count
value stored in the <I>cmd1</I>, <I>cmd2</I>, and <I>cmd3</I>
structures. 
</P>
<P STYLE="margin-bottom: 0.51cm">So if the &quot;insert&quot; keyword
was given on the command line then we display only those errors
associated