std::setiosflags

From cppreference.com

Compiler support
Freestanding and hosted
Language
Standard library
Standard library headers
Named requirements
Feature test macros(C++20)
Language support library
Concepts library(C++20)
Diagnostics library
Memory management library
Metaprogramming library(C++11)
General utilities library
Containers library
Iterators library
Ranges library(C++20)
Algorithms library
Strings library
Text processing library
Numerics library
Date and time library
Input/output library
Filesystem library(C++17)
Concurrency support library(C++11)
Execution control library(C++26)
Technical specifications
Symbols index
External libraries

[edit]

Input/output library

I/O manipulators
Print functions(C++23)
C-style I/O
Buffers
basic_streambuf
basic_filebuf
basic_stringbuf
basic_spanbuf (C++23)
strstreambuf (C++98/26*)
basic_syncbuf (C++20)
Streams
Abstractions
ios_base
basic_ios
basic_istream
basic_ostream
basic_iostream
File I/O
basic_ifstream
basic_ofstream
basic_fstream
String I/O
basic_istringstream
basic_ostringstream
basic_stringstream
Array I/O
basic_ispanstream (C++23)
basic_ospanstream (C++23)
basic_spanstream (C++23)
istrstream (C++98/26*)
ostrstream (C++98/26*)
strstream (C++98/26*)
Synchronized Output
basic_osyncstream (C++20)
Types
streamoff
streamsize
fpos
Error category interface
iostream_category (C++11)
io_errc (C++11)

[edit]

Input/output manipulators

Floating-point formatting

showpointnoshowpoint
setprecision

fixedscientifichexfloatdefaultfloat

(C++11)(C++11)

Integer formatting

setbase
showbasenoshowbase

dechexoct

Boolean formatting

boolalphanoboolalpha

Field width and fill control

setfill
setw

internalleftright

Other formatting

showposnoshowpos

uppercasenouppercase

Whitespace processing

ws
ends

skipwsnoskipws

Output flushing

flush
endl
flush_emit (C++20)

unitbufnounitbuf
emit_on_flushnoemit_on_flush (C++20)(C++20)

Status flags manipulation

resetiosflags

setiosflags

Time and money I/O

get_money (C++11)
get_time (C++11)

put_money (C++11)
put_time (C++11)

Quoted manipulator

quoted

(C++14)

[edit]

Defined in header`<iomanip>`
/unspecified/ setiosflags(std::ios_base::fmtflags mask);

When used in an expressionout<< setiosflags(mask) orin>> setiosflags(mask), sets all format flags of the streamout orin as specified by themask.

[edit]Parameters

mask

bitmask of the flags to set

[edit]Return value

An object of unspecified type such that

ifout is an object of typestd::basic_ostream<CharT, Traits>, the expressionout<< setiosflags(mask)
- has typestd::basic_ostream<CharT, Traits>&
- has valueout
- behaves as if it calledf(out, mask)
ifin is an object of typestd::basic_istream<CharT, Traits>, the expressionin>> setiosflags(mask)
- has typestd::basic_istream<CharT, Traits>&
- has valuein
- behaves as if it calledf(in, mask)

where the functionf is defined as:

void f(std::ios_base& str,std::ios_base::fmtflags mask){// set specified flags    str.setf(mask);}

[edit]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';}