title: How can I free allocated Memory?
body: <p>i have a homework and i have some problems </p>
  
  <pre><code>buch-&gt;title = malloc(MAX_STR* sizeof(char));
  buch-&gt;author = malloc(MAX_STR* sizeof(char));
  </code></pre>
  
  <p>how can i free this allocated memory?</p>