long double readMoney(istream& in, bool intl = false) { long double val; // Create a reader facet const money_get<char>& moneyReader = use_facet<money_get<char> >(in.getloc()); // End marker istreambuf_iterator<char> end; // State variable for detecting errors ios_base::iostate state = 0; moneyReader.get(in, end, intl, in, state, val); // failbit will be set if something went wrong if (state != 0 && !(state & ios_base::eofbit)) throw "Couldn't read money!\n"; return(val); }
void translateDate(istream& in, ostream& out) { // Create a date reader const time_get<char>& dateReader = use_facet<time_get<char> >(in.getloc( )); // Create a state object, which the facets will use to tell // us if there was a problem. ios_base::iostate state = 0; // End marker istreambuf_iterator<char> end; tm t; // Time struct (from <ctime>) // Now that all that's out of the way, read in the date from // the input stream and put it in a time struct. dateReader.get_date(in, end, in, state, &t); // Now the date is in a tm struct. Print it to the out stream // using its locale. Make sure you only print out what you // know is valid in t. if (state == 0 || state == ios_base::eofbit) { // The read succeeded. const time_put<char>& dateWriter = use_facet<time_put<char> >(out.getloc( )); char fmt[] = "%x"; if (dateWriter.put(out, out, out.fill( ), &t, &fmt[0], &fmt[2]).failed( )) cerr << "Unable to write to output stream.\n"; } else { cerr << "Unable to read cin!\n"; } }