std::ios_base::flags

C++

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Technical Specifications

Input/output library

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istrstream (deprecated)

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basic_osyncstream (C++20)

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streamoff

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fpos

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iostream_category (C++11)

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std::ios_base

Member functions

ios_base::ios_base

ios_base::~ios_base

Formatting

ios_base::flags

ios_base::setf

ios_base::unsetf

ios_base::precision

ios_base::width

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ios_base::imbue

ios_base::getloc

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ios_base::register_callback

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ios_base::failure

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ios_base::openmode

ios_base::fmtflags

ios_base::iostate

ios_base::seekdir

ios_base::event

ios_base::event_callback

fmtflags flags() const;	(1)
fmtflags flags( fmtflags flags );	(2)

Manages format flags.

1) returns current formatting setting

2) replaces current settings with given ones.

Parameters

flags

-

new formatting setting. It can be a combination of the following constants: Constant Explanation dec use decimal base for integer I/O: see std::dec oct use octal base for integer I/O: see std::oct hex use hexadecimal base for integer I/O: see std::hex basefield dec|oct|hex. Useful for masking operations left left adjustment (adds fill characters to the right): see std::left right right adjustment (adds fill characters to the left): see std::right internal internal adjustment (adds fill characters to the internal designated point): see std::internal adjustfield left|right|internal. Useful for masking operations scientific generate floating point types using scientific notation, or hex notation if combined with fixed: see std::scientific fixed generate floating point types using fixed notation, or hex notation if combined with scientific: see std::fixed floatfield scientific|fixed. Useful for masking operations boolalpha insert and extract bool type in alphanumeric format: see std::boolalpha showbase generate a prefix indicating the numeric base for integer output, require the currency indicator in monetary I/O: see std::showbase showpoint generate a decimal-point character unconditionally for floating-point number output: see std::showpoint showpos generate a + character for non-negative numeric output: see std::showpos skipws skip leading whitespace before certain input operations: see std::skipws unitbuf flush the output after each output operation: see std::unitbuf uppercase replace certain lowercase letters with their uppercase equivalents in certain output operations: see std::uppercase

Return value

the formatting flags before the call to the function

See also

setf	sets specific format flag (public member function)
unsetf	clears specific format flag (public member function)