exprtk_simple_example_05.cpp File Reference

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

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Classes
struct	myfunc< T >

Functions
template<typename T >
T	myotherfunc (T v0, T v1, T v2)
template<typename T >
void	custom_function ()
int	main ()

Function Documentation

custom_function()

template<typename T >

void custom_function

(

)

Definition at line 48 of file exprtk_simple_example_05.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 =
      "myfunc(sin(x / pi), otherfunc(3 * y, x / 2, x * y))";
 
   T x = T(1);
   T y = T(2);
   myfunc<T> mf;
 
   symbol_table_t symbol_table;
   symbol_table.add_variable("x",x);
   symbol_table.add_variable("y",y);
   symbol_table.add_function("myfunc",mf);
   symbol_table.add_function("otherfunc",myotherfunc);
   symbol_table.add_constants();
 
   expression_t expression;
   expression.register_symbol_table(symbol_table);
 
   parser_t parser;
   parser.compile(expression_string,expression);
 
   const T result = expression.value();
   printf("Result: %10.5f\n",result);
}

References myotherfunc().

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main()

int main

(

)

Definition at line 78 of file exprtk_simple_example_05.cpp.

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

myotherfunc()

template<typename T >

T myotherfunc	(	T	v0,
		T	v1,
		T	v2
	)

Definition at line 42 of file exprtk_simple_example_05.cpp.

{
   return std::abs(v0 - v1) * v2;
}

Referenced by custom_function().

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