title: Problem with itoa converting integer to string
body: <p>Perhaps not a really important question, but just starting out in c.
  Why will this not compile correctly?</p>
  
  <pre><code>#include &lt;stdio.h&gt;
  #include &lt;stdlib.h&gt;
  
  void main()
  {
  int i = 15;
  char word[100];
  
  itoa (i,word,10);
  
  printf("After conversion, int i = %d, char word = %s", i, word);
  }
  </code></pre>
  
  <p>I keep getting the error message</p>
  
  <pre><code>Undefined symbols:
  "_itoa", referenced from:
  _main in ccubsVbJ.o
  ld: symbol(s) not found
  collect2: ld returned 1 exit status
  </code></pre>