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Showing content from https://timsong-cpp.github.io/cppwp/n4659/floatfield.manip below:

[floatfield.manip]

30 Input/output library [input.output] 30.5 Iostreams base classes [iostreams.base] 30.5.6 ios_­base manipulators [std.ios.manip] 30.5.6.4 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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