 if you are using the C99 complex type, however,
unless you insert a <code>double*</code> typecast into the above macros
(see <a href="Complex-numbers.html#Complex-numbers">Complex numbers</a>).
</p>
<p>Also, FFTW 2 had an <code>fftw_real</code> typedef that was an alias for
<code>double</code> (in double precision).  In FFTW 3 you should just use
<code>double</code> (or whatever precision you are employing).
</p>
<a name="Plans"></a>
<h3 class="heading">Plans</h3>

<p>The major difference between FFTW 2 an