[basefield.manip]
31 Input/output library [input.output]
31.5 Iostreams base classes [iostreams.base]
31.5.5 ios_base manipulators [std.ios.manip]
31.5.5.3 basefield manipulators [basefield.manip]
Each function specified in this subclause is a designated addressable function ([namespace.std]).
ios_base& dec(ios_base& str);
Effects: Calls str.setf(ios_base::dec, ios_base::basefield).
ios_base& hex(ios_base& str);
Effects: Calls str.setf(ios_base::hex, ios_base::basefield).
ios_base& oct(ios_base& str);
Effects: Calls str.setf(ios_base::oct, ios_base::basefield).