ios_base& fixed(ios_base& str);
ios_base& scientific(ios_base& str);
ios_base& hexfloat(ios_base& str);
[ Note: The more obvious use of ios_base::hex to specify hexadecimal floating-point format would change the meaning of existing well defined programs. C++ 2003 gives no meaning to the combination of fixed and scientific. — end note ]
ios_base& defaultfloat(ios_base& str);