636619772367581343075535053490057448  </span><span class="comment">/* 2/pi           */</span><span class="preprocessor"></span></div>
<div class="line"><a id="l00571" name="l00571"></a><span class="lineno">  571</span><span class="preprocessor">#define M_2_SQRTPI  1.12837916709551257389615890312154517   </span><span class="comment">/* 2/sqrt(pi)     */</span><span class="preprocessor"></span></div>
<div class="line"><a id="l00572" name="l00572"></a><span class="lineno">  572</span><span class="preprocessor