\(\newcommand{\W}[1]{ \; #1 \; }\) \(\newcommand{\R}[1]{ {\rm #1} }\) \(\newcommand{\B}[1]{ {\bf #1} }\) \(\newcommand{\D}[2]{ \frac{\partial #1}{\partial #2} }\) \(\newcommand{\DD}[3]{ \frac{\partial^2 #1}{\partial #2 \partial #3} }\) \(\newcommand{\Dpow}[2]{ \frac{\partial^{#1}}{\partial {#2}^{#1}} }\) \(\newcommand{\dpow}[2]{ \frac{ {\rm d}^{#1}}{{\rm d}\, {#2}^{#1}} }\)

ad_input.cpp

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AD Output Operator: Example and Test

# include <cppad/cppad.hpp>

# include <sstream>  // std::istringstream
# include <string>   // std::string

bool ad_input(void)
{  bool ok = true;

   // create the input string stream is.
   std::string str ("123 456");
   std::istringstream is(str);

   // start and AD<double> recording
   CPPAD_TESTVECTOR( CppAD::AD<double> ) x(1), y(1);
   x[0] = 1.0;
   CppAD::Independent(x);
   CppAD::AD<double> z = x[0];
   ok &= Variable(z);

   // read first number into z and second into y[0]
   is >> z >> y[0];
   ok   &= Parameter(z);
   ok   &= (z == 123.);
   ok   &= Parameter(y[0]);
   ok   &= (y[0] == 456.);
   //
   // terminate recording starting by call to Independent
   CppAD::ADFun<double> f(x, y);

   return ok;
}