std::ios_base::setf

 

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std::ios_base

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ios_base::flags

ios_base::setf

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fmtflags setf( fmtflags flags );	(1)
fmtflags setf( fmtflags flags, fmtflags mask );	(2)

Sets the formatting flags to specified settings.

1) Sets the formatting flags to flags

2) Clears the formatting flags under mask, and sets the cleared flags to those specified by flags. Essentially the following operation is performed  (flags & mask) where fl defines the state of internal formatting flags.

Parameters

flags, mask

-

new formatting setting. mask defines which flags can be altered, flags defines which flags of those to be altered should be set (others will be cleared). Both parameters can be a combination of the following constants: Constant Explanation dec use decimal base for integer I/O oct use octal base for integer I/O hex use hexadecimal base for integer I/O basefield dec|oct|hex|0. Useful for masking operations left left adjustment (adds fill characters to the right) right right adjustment (adds fill characters to the left) internal internal adjustment (adds fill characters to the internal designated point) adjustfield left|right|internal. Useful for masking operations scientific generate floating point types using scientific notation, or hex notation if combined with fixed fixed generate floating point types using fixed notation, or hex notation if combined with scientific floatfield scientific|fixed|(scientific|fixed)|0. Useful for masking operations boolalpha insert and extract bool type in alphanumeric format showbase generate a prefix indicating the numeric base for integer output, require the currency indicator in monetary I/O showpoint generate a decimal-point character unconditionally for floating-point number output showpos generate a + character for non-negative numeric output skipws skip leading whitespace before certain input operations unitbuf flush the output after each output operation uppercase replace certain lowercase letters with their uppercase equivalents in certain output output operations

Return value

the formatting flags before the call to the function

See also

flags	manages format flags (public member function)
unsetf	clears specific format flag (public member function)