<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/118619>118619</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Why I am get error LNK2019?
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          MaxProger338
      </td>
    </tr>
</table>

<pre>
    Hi everybody! I have a problem with compilation. I need your help

I'm trying to create a class and write its methods in another file. 


I don’t know why it complains, maybe I need to add some parameter for clang 
Or should I add something to the code?
I will be glad for any help. Thanks in advance!




</pre>
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