exprtk_pythagorean_triples.cpp File Reference

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

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

Function Documentation

exprtk_pythagorean_triples()

template<typename T >

void exprtk_pythagorean_triples

(

)

Definition at line 27 of file exprtk_pythagorean_triples.cpp.

{
   typedef exprtk::symbol_table<T> symbol_table_t;
   typedef exprtk::expression<T>   expression_t;
   typedef exprtk::parser<T>       parser_t;
 
   const std::string pythagorean_triples_program =
      " const var num_triples := 1000;                "
      " var triple_count      := 0;                   "
      " var n                 := 2;                   "
      "                                               "
      " while (true)                                  "
      " {                                             "
      "    for (var i := 1; i < n; i += 1)            "
      "    {                                          "
      "       var a := n^2 - i^2;                     "
      "       var b := 2 * n * i;                     "
      "       var c := n^2 + i^2;                     "
      "                                               "
      "       if (a > b) a <=> b;                     "
      "       if (b > c) b <=> c;                     "
      "       if (a > b) a <=> b;                     "
      "                                               "
      "       println('(', a ,',', b ,',', c ,')');   "
      "                                               "
      "       if ((triple_count += 1) >= num_triples) "
      "       {                                       "
      "          return [];                           "
      "       };                                      "
      "    };                                         "
      "                                               "
      "    n += 1;                                    "
      " }                                             ";
 
   exprtk::rtl::io::println<T> println;
 
   symbol_table_t symbol_table;
   symbol_table.add_function ("println", println);
 
   expression_t expression;
   expression.register_symbol_table(symbol_table);
 
   parser_t parser;
   parser.compile(pythagorean_triples_program, expression);
 
   expression.value();
}

main()

int main

(

)

Definition at line 75 of file exprtk_pythagorean_triples.cpp.

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