c/src/images/note.png"></td>
<th align="left">Note</th>
</tr>
<tr><td align="left" valign="top">
<p>
          An implementation may give zero and non-numeric values (such as infinities
          and NaNs) a sign or may leave them unsigned. Wherever such values are unsigned,
          any requirement in the C99 Standard to retrieve the sign shall produce
          an unspecified sign, and any requirement to set the sign shall be ignored.
        </p>
<p>
          This might apply to user-defined types, but