exprtk_simple_example_19.cpp File Reference

#include <cstdio>
#include <cstdlib>
#include <ctime>
#include <string>
#include "exprtk.hpp"

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Classes
class	randu< T >

Functions
template<typename T >
void	vector_randu ()
int	main ()

Function Documentation

main()

int main

(

)

Definition at line 127 of file exprtk_simple_example_19.cpp.

{
   vector_randu<double>();
   return 0;
}

vector_randu()

template<typename T >

void vector_randu

(

)

Definition at line 83 of file exprtk_simple_example_19.cpp.

{
   typedef exprtk::symbol_table<T> symbol_table_t;
   typedef exprtk::expression<T>   expression_t;
   typedef exprtk::parser<T>       parser_t;
 
   const std::string vecrandu_program =
      " var noise[6] := [0];                          "
      "                                               "
      " if (randu(noise,0,5) == false)                "
      " {                                             "
      "    println('Failed to generate noise');       "
      "    return [false];                            "
      " };                                            "
      "                                               "
      " var noisy[noise[]] := signal + (noise - 1/2); "
      "                                               "
      " for (var i := 0; i < noisy[]; i += 1)         "
      " {                                             "
      "    println('noisy[',i,'] = ', noisy[i]);      "
      " };                                            "
      "                                               "
      " println('avg: ', avg(noisy));                 "
      "                                               ";
 
   T signal[] = { T(1.1), T(2.2), T(3.3), T(4.4), T(5.5), T(6.6), T(7.7) };
 
   exprtk::rtl::io::println<T> println;
   randu<T>                    randu;
 
   symbol_table_t symbol_table;
   symbol_table.add_vector  ("signal" , signal );
   symbol_table.add_function("println", println);
   symbol_table.add_function("randu"  , randu  );
 
   expression_t expression;
   expression.register_symbol_table(symbol_table);
 
   parser_t parser;
   parser.compile(vecrandu_program,expression);
 
   expression.value();
}

References exprtk::symbol_table< T >::add_function(), exprtk::symbol_table< T >::add_vector(), exprtk::parser< T >::compile(), exprtk::expression< T >::register_symbol_table(), and exprtk::expression< T >::value().

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