<span class="keywordsign">-&gt;</span>&nbsp;int&nbsp;=&nbsp;<span class="string">"%addint"</span><br>
&nbsp;&nbsp;<span class="keyword">external</span>&nbsp;(&nbsp;-&nbsp;)&nbsp;:&nbsp;int&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;int&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;int&nbsp;=&nbsp;<span class="string">"%subint"</span><br>
&nbsp;&nbsp;<span class="keyword">external</span>&nbsp;(&nbsp;*&nbsp;)&nbsp;:&nbsp;int&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;int&nbsp;<span class="keywo