moneypunct.cpp

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#include <climits>    // for CHAR_MAX
#include <clocale>    // for lconv, localeconv()
#include <iostream>   // for cout, endl
#include <locale>     // for locale
 
#include <examples.h>
 
 
int main ()
{
    // Get a moneypunct facet from the classic "C" locale
    const std::moneypunct<char, false> &mp =
        std::use_facet<std::moneypunct<char, false> >(std::locale::classic ());
 
    const std::lconv* const lc = std::localeconv ();
    
    // Expected output:
    // Punctuator             C++   C99
    // Decimal point        = '.'   "."
    // Thousands separator  = ','   ""
    // Currency symbol      = ""    ""
    // Negative Sign        = ""    ""
    // Positive Sign        = ""    ""
    // Digits after decimal = 0    CHAR_MAX
 
    std::cout << "Punctuator             C++   C99\n";
 
    std::cout << "Decimal point        = '"
              << mp.decimal_point () << "'   \""
              << lc->decimal_point << '"';
 
    std::cout << "\nThousands separator  = '"
              << mp.thousands_sep () << "'   \""
              << lc->thousands_sep << '"';
 
    std::cout << "\nCurrency symbol      = \""
              << mp.curr_symbol () << "\"    \""
              << lc->currency_symbol << '"';
 
    std::cout << "\nNegative Sign        = \""
              << mp.negative_sign () << "\"    \""
              << lc->negative_sign << '"';
 
    std::cout << "\nPositive Sign        = \""
              << mp.positive_sign () << "\"    \""
              << lc->positive_sign << '"';
 
    std::cout << "\nDigits after decimal = "
              << mp.frac_digits () << "    ";
 
    // since the value of CHAR_MAX depends on the signedness of char,
    // if lc->frac_digits equals CHAR_MAX print the string "CHAR_MAX"
    // to maintain the same output across all architectures, otherwise
    // print the actual value
 
    if (CHAR_MAX == lc->frac_digits)
        std::cout << "CHAR_MAX";
    else {
        // this block should not be entered in a conforming environment
        // since, according to 7.11, p2 of C99, frac_digits is required
        // to be equal to CHAR_MAX in the "C" locale
 
        // cast lconv::frac_digits from char to int to print out
        // the numeric value of the member
        std::cout << int (lc->frac_digits)
                  << " (libc bug: expected CHAR_MAX, i.e., "
                  << unsigned ((unsigned char)CHAR_MAX)
                  << ")";
    }
 
    std::cout << std::endl;
 
    return 0;
}