The following code example is taken from the book
The C++ Standard Library - A Tutorial and Reference
by Nicolai M. Josuttis, Addison-Wesley, 1999
© Copyright Nicolai M. Josuttis 1999
#include <iostream>
#include <locale>
using namespace std;
int main()
{
// use classic C locale to read data from standard input
cin.imbue(locale::classic());
// use a German locale to write data to standard ouput
cout.imbue(locale("de_DE"));
// read and output floating-point values in a loop
double value;
while (cin >> value) {
cout << value << endl;
}
}