title: C programming call function
body: <p>I'm new to C Programming and would like to learn the basics. Would anyone be able to help me on how to call a function that has a parameter which is a pointer?</p>
  
  <p>The code that I have in <code>user.c</code> file:</p>
  
  <pre><code>struct user * play_game(struct user * first, struct user * second)
  {
      game_board board;
      enum cell token;
      struct user * current, *other, *winner;
  }
  </code></pre>
  
  <p>The code is also in <code>user.h</code> file but without the inside statement.
  How would I be able to call it in the <code>main.c</code> file? I'm not sure what the parameters are and how it works.</p>