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std::resetiosflags(3) C++ Standard Libary std::resetiosflags(3) NAME std::resetiosflags - std::resetiosflags Synopsis Defined in header <iomanip> /*unspecified*/ resetiosflags( std::ios_base::fmtflags mask ); When used in an expression out << resetiosflags(mask) or in >> rese- tiosflags(mask), clears all format flags of the stream out or in as specified by the mask. Parameters mask - bitmask of the flags to clear Return value An object of unspecified type such that * if out is an object of type std::basic_ostream<CharT, Traits>, the expression out << resetiosflags(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 >> resetiosflags(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) { // reset specified flags str.setf(ios_base::fmtflags(0), mask); } Example // Run this code #include <iomanip> #include <iostream> #include <sstream> int main() { std::istringstream in("10 010 10 010 10 010"); int n1, n2; in >> std::oct >> n1 >> n2; std::cout << "Parsing \"10 010\" with std::oct gives: " << n1 << ' ' << n2 << '\n'; in >> std::dec >> n1 >> n2; std::cout << "Parsing \"10 010\" with std::dec gives: " << n1 << ' ' << n2 << '\n'; in >> std::resetiosflags(std::ios_base::basefield) >> n1 >> n2; std::cout << "Parsing \"10 010\" with autodetect gives: " << n1 << ' ' << n2 << '\n'; } Output: Parsing "10 010" with std::oct gives: 8 8 Parsing "10 010" with std::dec gives: 10 10 Parsing "10 010" with autodetect gives: 10 8 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 resetiosflags could only be used with us- able with any streams of type std::ostream or std::istream character stream See also setf sets specific format flag (public member function of std::ios_base) setiosflags sets the specified ios_base flags (function) http://cppreference.com 2024.06.10 std::resetiosflags(3)
NAME | Synopsis | Parameters | Return value | Example | Output: | See also
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