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<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

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