title: Best practice: src/include or include folder next to src folder
body: <p>What is the best or most commonly used practice for the folder structure of a project:</p>
  
  <pre><code>project |-- src |-- include
  </code></pre>
  
  <p>or </p>
  
  <pre><code>project |--src
                |--include
  </code></pre>
  
  <p>i.e. have the include folder within the source folder or both next to each other?</p>
  
  <p><strong>edit:</strong></p>
  
  <p>This wuestion is similar: <a href="https://stackoverflow.com/questions/2924037/separate-include-and-src-folders-for-application-level-code">Separate &quot;include&quot; and &quot;src&quot; folders for application-level code?</a> , but the answers are not really satisfying.</p>