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<?xml version='1.0'?>
<html xmlns='http://www.w3.org/1999/xhtml'
      xmlns:math='http://www.w3.org/1998/Math/MathML'
>
<head>
<title>nan: Example and Test</title>
<meta http-equiv='Content-Type' content='text/html' charset='utf-8'/>
<meta name="description" id="description" content="nan: Example and Test"/>
<meta name="keywords" id="keywords" content=" nan: example and test nan "/>
<style type='text/css'>
body { color : black }
body { background-color : white }
A:link { color : blue }
A:visited { color : purple }
A:active { color : purple }
</style>
<script type='text/javascript' language='JavaScript' src='_nan.cpp_xml.js'>
</script>
</head>
<body>
<table><tr>
<td>
<a href="http://www.coin-or.org/CppAD/" target="_top"><img border="0" src="_image.gif"/></a>
</td>
<td><a href="nan.xml" target="_top">Prev</a>
</td><td><a href="pow_int.xml" target="_top">Next</a>
</td><td>
<select onchange='choose_across0(this)'>
<option>Index-&gt;</option>
<option>contents</option>
<option>reference</option>
<option>index</option>
<option>search</option>
<option>external</option>
</select>
</td>
<td>
<select onchange='choose_up0(this)'>
<option>Up-&gt;</option>
<option>CppAD</option>
<option>library</option>
<option>nan</option>
<option>nan.cpp</option>
</select>
</td>
<td>
<select onchange='choose_down3(this)'>
<option>CppAD-&gt;</option>
<option>Install</option>
<option>Introduction</option>
<option>AD</option>
<option>ADFun</option>
<option>preprocessor</option>
<option>multi_thread</option>
<option>library</option>
<option>ipopt_solve</option>
<option>Example</option>
<option>speed</option>
<option>Appendix</option>
</select>
</td>
<td>
<select onchange='choose_down2(this)'>
<option>library-&gt;</option>
<option>ErrorHandler</option>
<option>NearEqual</option>
<option>speed_test</option>
<option>SpeedTest</option>
<option>time_test</option>
<option>NumericType</option>
<option>CheckNumericType</option>
<option>SimpleVector</option>
<option>CheckSimpleVector</option>
<option>nan</option>
<option>pow_int</option>
<option>Poly</option>
<option>LuDetAndSolve</option>
<option>RombergOne</option>
<option>RombergMul</option>
<option>Runge45</option>
<option>Rosen34</option>
<option>OdeErrControl</option>
<option>OdeGear</option>
<option>OdeGearControl</option>
<option>CppAD_vector</option>
<option>thread_alloc</option>
<option>index_sort</option>
<option>BenderQuad</option>
<option>opt_val_hes</option>
<option>LuRatio</option>
</select>
</td>
<td>
<select onchange='choose_down1(this)'>
<option>nan-&gt;</option>
<option>nan.cpp</option>
</select>
</td>
<td>nan.cpp</td>
<td>Headings</td>
</tr></table><br/>


<center><b><big><big>nan: Example and Test</big></big></b></center>
<code><font color="blue"><pre style='display:inline'> 
# include &lt;cppad/nan.hpp&gt;
# include &lt;vector&gt;

bool nan(void)
{	bool ok = true;

	// get a nan
	double double_zero = 0.;
	double double_nan = CppAD::nan(double_zero);

	// create a simple vector with no nans
	std::vector&lt;double&gt; v(2);
	v[0] = double_zero;
	v[1] = double_zero;

	// check that zero is not nan
	ok &amp;= ! CppAD::isnan(double_zero);
	ok &amp;= ! CppAD::hasnan(v);

	// check that nan is a nan
	v[1] = double_nan;
	ok &amp;= CppAD::isnan(double_nan);
	ok &amp;= CppAD::hasnan(v);

	// check that nan is not equal to itself
	ok &amp;= (double_nan != double_nan);

	return ok;
}

</pre>

</font></code>


<hr/>Input File: example/nan.cpp

</body>
</html>