[floatfield.manip]

ios_base& fixed(ios_base& str);

Effects: Calls str.setf(ios_base::fixed, ios_base::floatfield).

Returns: str.

ios_base& scientific(ios_base& str);

Effects: Calls str.setf(ios_base::scientific, ios_base::floatfield).

Returns: str.

ios_base& hexfloat(ios_base& str);

Effects: Calls str.setf(ios_base::fixed | ios_base::scientific, ios_base::floatfield).

[Note 1:

ios_base::hex cannot be used to specify a hexadecimal floating-point format, because it is not part of ios_base::floatfield (Table 137).

— end note]

ios_base& defaultfloat(ios_base& str);

Returns: str.