View difference between Paste ID: vmVUXVk6 and DgfeaKbG

 #include <iostream>
 #include <locale>
 #include <vector>
 
 std::ostream & operator << ( std::ostream &os, const wchar_t * txt )
 {
-    std::wcout << L"User locale: " << loc.name() << std::endl;
+  int new_size = WideCharToMultiByte( CP_UTF8, 0, txt, -1, NULL, NULL, NULL, NULL );
   if ( new_size <= 0 )
-    std::wcout << str << std::endl;
+    return os;
   std::vector<char> buffer(new_size);
   WideCharToMultiByte( CP_UTF8, 0, txt, -1, &buffer[0], new_size, NULL, NULL );
   os << &buffer[0];
-       std::wcout << toupper(*it, loc);
+  return os;
 }
 
-    std::wcout << std::endl;
+
     {
     std::locale loc("fr_FR");
     std::cout << "User locale: " << loc.name() << std::endl;
     std::wstring str(L"àäâéèêëïîöôüû");
     std::cout << str.c_str() << std::endl;
 
     for(std::wstring::iterator it=str.begin();it!=str.end();++it)
        {
        *it = toupper(*it, loc);
        }
     std::cout << str.c_str();
     std::cout << std::endl;
 
     return 0;
     }