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std::setfill(3) C++ Standard Libary std::setfill(3) NAME std::setfill - std::setfill Synopsis Defined in header <iomanip> template< class CharT > /*unspecified*/ setfill( CharT c ); When used in an expression out << setfill(c) sets the fill character of the stream out to c. Parameters c - new value for the fill character Return value An object of unspecified type such that * if out is an object of type std::basic_ostream<CharT, Traits>, the expression out << setfill(c) * has type std::basic_ostream<CharT, Traits>& * has value out * behaves as if it called f(out, c) where the function f is defined as: template<class CharT, class Traits> void f(std::basic_ios<CharT, Traits>& str, CharT c) { // set fill character str.fill(c); } Notes The current fill character may be obtained with std::ostream::fill. Example // Run this code #include <iomanip> #include <iostream> int main() { std::cout << "default fill: [" << std::setw(10) << 42 << "]\n" << "setfill('*'): [" << std::setfill('*') << std::setw(10) << 42 << "]\n"; } Output: default fill: [ 42] setfill('*'): [********42] Defect reports The following behavior-changing defect reports were applied retroac- tively to previously published C++ standards. DR Applied to Behavior as published Correct behav- ior LWG 183 C++98 setbase could only be used with usable with any output streams of type std::ostream character stream See also fill manages the fill character (public member function of std::basic_ios<CharT,Traits>) internal sets the placement of fill characters left (function) right setw changes the width of the next input/output field (function) http://cppreference.com 2024.06.10 std::setfill(3)
NAME | Synopsis | Parameters | Return value | Notes | Example | Output: | See also
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