ts, respectively, of the
          smallest root in magnitude.

</PRE>
<B>Error Indicator</B>
<PRE>
  INFO    INTEGER
          = 0:  successful exit;
          = 1:  if on entry, either A = B = 0.0 or A = 0.0 and the
                root -C/B overflows; in this case Z1RE, Z1IM, Z2RE
                and Z2IM are unassigned;
          = 2:  if on entry, A = 0.0; in this case Z1RE contains
                BIG and Z1IM contains zero, where BIG is a
                representable number near the overflow thresho