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 <locale>
#include <iostream>
#include <string>
class germanBoolNames : public std::numpunct_byname<char> {
public:
germanBoolNames (const std::string& name)
: std::numpunct_byname<char>(name) {
}
protected:
virtual std::string do_truename () const {
return "wahr";
}
virtual std::string do_falsename () const {
return "falsch";
}
};
int main()
{
std::locale loc (std::locale(""), new germanBoolNames(""));
std::cout.imbue(loc);
std::cout << std::boolalpha << true << std::endl;
}