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 <iostream>
#include <locale>
#include <exception>
#include <cstdlib>
using namespace std;
int main()
{
try {
// use classic C locale to read data from standard input
cin.imbue(locale::classic());
// use a German locale to write data to standard output
// - use different locale names for Windows and POSIX
#ifdef _MSC_VER
cout.imbue(locale("deu_deu.1252"));
#else
cout.imbue(locale("de_DE"));
#endif
// read and output floating-point values in a loop
cout << "input floating-point values (classic notation): " << endl;
double value;
while (cin >> value) {
cout << value << endl;
}
}
catch (const std::exception& e) {
cerr << "Exception: " << e.what() << endl;
return EXIT_FAILURE;
}
}