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<center><b><big><big>Convert From AD to its Base Type: Example and Test</big></big></b></center>
<code><font color="blue"><pre style='display:inline'>
# include <cppad/cppad.hpp>
bool Value(void)
{ bool ok = true;
using CppAD::AD;
using CppAD::Value;
// domain space vector
size_t n = 2;
<a href="test_vector.xml" target="_top">CPPAD_TEST_VECTOR</a>< <a href="ad.xml" target="_top">AD</a><double> > x(n);
x[0] = 3.;
x[1] = 4.;
// check value before recording
ok &= (Value(x[0]) == 3.);
ok &= (Value(x[1]) == 4.);
// declare independent variables and start tape recording
CppAD::<a href="independent.xml" target="_top">Independent</a>(x);
// range space vector
size_t m = 1;
<a href="test_vector.xml" target="_top">CPPAD_TEST_VECTOR</a>< <a href="ad.xml" target="_top">AD</a><double> > y(m);
y[0] = - x[1];
// cannot call Value(x[j]) or Value(y[0]) here (currently variables)
<a href="ad.xml" target="_top">AD</a><double> p = 5.; // p is a parameter (does not depend on x)
ok &= (Value(p) == 5.);
// create f: x -> y and stop tape recording
CppAD::<a href="funconstruct.xml" target="_top">ADFun</a><double> f(x, y);
// can call Value(x[j]) or Value(y[0]) here (currently parameters)
ok &= (Value(x[0]) == 3.);
ok &= (Value(x[1]) == 4.);
ok &= (Value(y[0]) == -4.);
return ok;
}</pre>
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<hr/>Input File: example/value.cpp
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