The following code example is taken from the book
The C++ Standard Library - A Tutorial and Reference, 2nd Edition
by Nicolai M. Josuttis, Addison Wesley Longman, 2012
Copyright © 2012 by Pearson Education, Inc. and Nicolai M. Josuttis
#include <string>
#include <iostream>
#include <locale>
#include <exception>
#include <cstdlib>
using namespace std;
// output operator for pos_format() and neg_format():
ostream& operator<< (ostream& strm, moneypunct<char>::pattern p)
{
for (int i=0; i<4; ++i) {
auto f = p.field[i];
strm << (f==money_base::none ? "none" :
f==money_base::space ? "space" :
f==money_base::symbol ? "symbol" :
f==money_base::sign ? "sign" :
f==money_base::value ? "value" :
"???") << " ";
}
return strm;
}
template <bool intl>
void printMoneyPunct (const string& localeName)
{
locale loc(localeName);
const moneypunct<char,intl>& mp
= use_facet<moneypunct<char,intl>>(loc);
cout << "moneypunct in locale \"" << loc.name() << "\":" << endl;
cout << " decimal_point: " << (mp.decimal_point()!='\0' ?
mp.decimal_point() : ' ') << endl;
cout << " thousands_sep: " << (mp.thousands_sep()!='\0' ?
mp.thousands_sep() : ' ') << endl;
cout << " grouping: ";
for (int i=0; i<mp.grouping().size(); ++i) {
cout << static_cast<int>(mp.grouping()[i]) << ' ';
}
cout << endl;
cout << " curr_symbol: " << mp.curr_symbol() << endl;
cout << " positive_sign: " << mp.positive_sign() << endl;
cout << " negative_sign: " << mp.negative_sign() << endl;
cout << " frac_digits: " << mp.frac_digits() << endl;
cout << " pos_format: " << mp.pos_format() << endl;
cout << " neg_format: " << mp.neg_format() << endl;
}
int main ()
{
try {
printMoneyPunct<false>("C");
cout << endl;
printMoneyPunct<false>("german");
cout << endl;
printMoneyPunct<true>("german");
}
catch (const std::exception& e) {
cerr << "Exception: " << e.what() << endl;
return EXIT_FAILURE;
}
}