title: C parsing double from argument strings
body: <p>I'm trying to parse an argument value in C and convert the number to a double value.  I have:</p>
  <p><code>char *stringEnd;
  double num = strtod(&quot;123.0&quot;, &amp;stringEnd);</code></p>
  <p>I used <code>&quot;123.0&quot;</code> just to test the function, but it always returns a value of <code>0.0</code>.  Does anybody know what I'm doing wrong?</p>