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Showing content from https://timsong-cpp.github.io/cppwp/n4140/floatfield.manip below:

[floatfield.manip]

27.5.6.4 floatfield manipulators [floatfield.manip]

ios_base& fixed(ios_base& str);

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

ios_base& scientific(ios_base& str);

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

ios_base& hexfloat(ios_base& str);

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

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);

Effects: Calls str.unsetf(ios_base::floatfield).


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