exprtk_tower_of_hanoi.cpp File Reference

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

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

Function Documentation

main()

int main

(

)

Definition at line 86 of file exprtk_tower_of_hanoi.cpp.

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

tower_of_hanoi_example()

template<typename T >

void tower_of_hanoi_example

(

)

Definition at line 26 of file exprtk_tower_of_hanoi.cpp.

{
   typedef exprtk::symbol_table<T>         symbol_table_t;
   typedef exprtk::expression<T>           expression_t;
   typedef exprtk::parser<T>               parser_t;
   typedef exprtk::function_compositor<T>  compositor_t;
   typedef typename compositor_t::function function_t;
 
   std::vector<T> disks = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
 
   exprtk::rtl::io::package<T> io_package;
 
   symbol_table_t symbol_table;
   symbol_table.add_vector ("disks", disks);
   symbol_table.add_package(io_package);
 
   compositor_t compositor(symbol_table);
 
   compositor.load_variables(true);
   compositor.load_vectors  (true);
 
   compositor.add(
      function_t("move_disk")
      .vars("disk", "src_rod", "dest_rod")
      .expression
      (
         "println('Move disk', disk ,' from rod[', src_rod ,'] to rod[', dest_rod ,']');"
      ));
 
   compositor.add(
      function_t("tower_of_hanoi")
      .vars("n", "src", "dest", "aux")
      .expression
      (
         " if (n == 1)                            "
         " {                                      "
         "    move_disk(disks[0], src, dest);     "
         "    return [true];                      "
         " };                                     "
         "                                        "
         " tower_of_hanoi(n - 1, src, aux, dest); "
         "                                        "
         " move_disk(disks[n - 1], src, dest);    "
         "                                        "
         " tower_of_hanoi(n - 1, aux, dest, src); "
         "                                        "
      ));
 
   const std::string tower_of_hanoi_program =
      " tower_of_hanoi(disks[], 1, 2, 3); ";
 
   expression_t expression;
   expression.register_symbol_table(symbol_table);
 
   parser_t parser;
   parser.compile(tower_of_hanoi_program,expression);
 
   expression.value();
}