icp/oer/courses/c-basics/sections/11-strings/02-lib/content.html

<p>
  In C there are some usefull functions ready to use for strings.
  If you want to use them you have to include <it>&lt;string.h&gt;</it>.
  Implement a function that concatenates all words beginning with "pre".
</p>
<p>
  Try using the functions strncmp and strcat.
</p>