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<h4 class="subsection">8.7.3 <code>define-alien-routine</code> Example</h4>
<p>Consider the C function <code>cfoo</code> with the following calling
convention:
<pre class="example"> void
cfoo (str, a, i)
char *str;
char *a; /* update */
int *i; /* out */
{
/* body of cfoo(...) */
}
</pre>
<p>This can be described by the following call to
<code>define-alien-routine</code>:
<pre class="lisp"> (define-alien-routine "cfoo" void
(str c-string)
(a char :in-out)
(i int :out))
</pre>
<p>The Lisp function <code>cfoo</code> will have two arguments (<var>str</var> and
<var>a</var>) and two return values (<var>a</var> and <var>i</var>).
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