=special>.</span><span class=identifier>hpp</span><span class=special>&gt;</span>
<span class=preprocessor>#include </span><span class=special>&lt;</span><span class=identifier>cstddef</span><span class=special>&gt;</span>
<span class=preprocessor>#include </span><span class=special>&lt;</span><span class=identifier>ostream</span><span class=special>&gt;</span>
<span class=preprocessor>#include </span><span class=special>&lt;</span><span class=identifier>string</span><span class=special>&gt;
</span>
<span c