#include <iostream>
#include <locale>

/**/int main()
    {
    std::locale loc("fr_FR.utf8");
    std::cout<<"User locale: " << loc.name() << std::endl;
    std::string str("àäâéèêëïîöôüû");
    std::cout<<str <<std::endl;

    for(std::string::iterator it=str.begin();it!=str.end();++it)
       {
       std::cout << toupper(*it, loc);
       }

    std::cout <<std::endl;

    return 0;
    }