ool </span><span class=keyword>operator</span><span class=special>()(</span><span class=keyword>int </span><span class=identifier>x</span><span class=special>,</span><span class=keyword>const </span><span class=identifier>employee</span><span class=special>&amp; </span><span class=identifier>e2</span><span class=special>)</span><span class=keyword>const</span><span class=special>{</span><span class=keyword>return </span><span class=identifier>x</span><span class=special>&lt;</span><span class=identifier>e2<