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std::setiosflags(3) C++ Standard Libary std::setiosflags(3) NAME std::setiosflags - std::setiosflags Synopsis Defined in header <iomanip> /*unspecified*/ setiosflags( std::ios_base::fmtflags mask ); When used in an expression out << setiosflags(mask) or in >> setios- flags(mask), sets all format flags of the stream out or in as specified by the mask. Parameters mask - bitmask of the flags to set Return value An object of unspecified type such that * if out is an object of type std::basic_ostream<CharT, Traits>, the expression out << setiosflags(mask) * has type std::basic_ostream<CharT, Traits>& * has value out * behaves as if it called f(out, mask) * if in is an object of type std::basic_istream<CharT, Traits>, the expression in >> setiosflags(mask) * has type std::basic_istream<CharT, Traits>& * has value in * behaves as if it called f(in, mask) where the function f is defined as: void f(std::ios_base& str, std::ios_base::fmtflags mask) { // set specified flags str.setf(mask); } Example // Run this code #include <iomanip> #include <iostream> int main() { std::cout << std::resetiosflags(std::ios_base::dec) << std::setiosflags( std::ios_base::hex | std::ios_base::uppercase | std::ios_base::showbase) << 42 << '\n'; } Output: 0X2A Defect reports The following behavior-changing defect reports were applied retroac- tively to previously published C++ standards. DR Applied to Behavior as published Cor- rect behavior LWG 183 C++98 setiosflags could only be used with streams us- able with any of type std::ostream or std::istream char- acter stream See also setf sets specific format flag (public member function of std::ios_base) resetiosflags clears the specified ios_base flags (function) http://cppreference.com 2024.06.10 std::setiosflags(3)
NAME | Synopsis | Parameters | Return value | Example | Output: | See also
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