#
ios_base& boolalpha(ios_base& str);
ios_base& noboolalpha(ios_base& str);
ios_base& showbase(ios_base& str);
ios_base& noshowbase(ios_base& str);
ios_base& showpoint(ios_base& str);
ios_base& noshowpoint(ios_base& str);
ios_base& showpos(ios_base& str);
ios_base& noshowpos(ios_base& str);
ios_base& skipws(ios_base& str);