10 Non-US Formatted Formulas

TinyExpr++ supports other locales and non-US formatted formulas. Here is an example:

#include "tinyexpr.h"
#include <iostream>
#include <iomanip>
#include <locale>
#include <clocale>

int main(int argc, char *argv[])
    {
    /* Set locale to German.
       This string is platform dependent. The following works on Windows,
       consult your platform's documentation for more details.*/
    setlocale(LC_ALL, "de-DE");
    std::locale::global(std::locale("de-DE"));

    /* After setting your locale to German, functions like strtod() will fail
       with values like "3.14" because it expects "3,14" instead.
       To fix this, we will tell the parser to use "," as the decimal separator
       and ";" as the list argument separator.*/
    const char* expression = "pow(2,2; 2)"; // instead of "pow(2.2, 2)"
    std::cout << "Evaluating:\n\t" << expression << "\n";

    te_parser tep;
    tep.set_decimal_separator(',');
    tep.set_list_separator(';');
    const auto result = tep.evaluate(expression);

    if (tep.success())
        { std::cout << "Result:\n\t" << result << "\n"; }
    else /* Show the user where the error is at. */
        {
        std::cout << "\t " << std::setfill(' ') <<
            std::setw(tep.get_last_error_position()) << "^\tError here\n";
        }

    return EXIT_SUCCESS;
    }

This produces the output:

$ Evaluating:
    pow(2,2; 2)
  Result:
    4,840000