title: adding space in strcat
body: <p>I have two strings <code>char str1[41]</code>  e <code>char str2[41]</code>. If I use <code>strcat</code> function to concatenate them I get an unique string without space instead I would have space between these.</p>
  
  <p>this could be a way:</p>
  
  <pre><code>strcat(strcat(str1, " "),str2)
  </code></pre>
  
  <p>Does it exist another way?</p>