exprtk_simple_example_01.cpp File Reference

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

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

Function Documentation

main()

int main

(

)

Definition at line 55 of file exprtk_simple_example_01.cpp.

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

trig_function()

template<typename T >

void trig_function

(

)

Definition at line 27 of file exprtk_simple_example_01.cpp.

{
   typedef exprtk::symbol_table<T> symbol_table_t;
   typedef exprtk::expression<T>   expression_t;
   typedef exprtk::parser<T>       parser_t;
 
   const std::string expression_string =
      "clamp(-1.0, sin(2 * pi * x) + cos(x / 2 * pi), +1.0)";
 
   T x;
 
   symbol_table_t symbol_table;
   symbol_table.add_variable("x",x);
   symbol_table.add_constants();
 
   expression_t expression;
   expression.register_symbol_table(symbol_table);
 
   parser_t parser;
   parser.compile(expression_string,expression);
 
   for (x = T(-5); x <= T(+5); x += T(0.001))
   {
      const T y = expression.value();
      printf("%19.15f\t%19.15f\n", x, y);
   }
}

References exprtk::parser< T >::compile().

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