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std::setiosflags

From cppreference.com
< cpp‎ | io‎ | manip
Defined in header <iomanip>
/*unspecified*/ setiosflags( std::ios_base::fmt_flags mask );

When used in an expression out << setiosflags(mask) or in >> setiosflags(mask), sets all format flags of the stream out or in as specified by the mask.

Contents

[edit] Parameters

mask - bitmask of the flags to set

[edit] Return value

Returns an object of unspecified type such that if str is the name of an output stream of type std::basic_ostream<CharT, Traits> or std::basic_istream<CharT, Traits>, then the expression str << setiosflags(mask) or str >> setiosflags(mask) behaves as if the following code was executed:

str.setf(mask);

[edit] Example

#include <iostream>
#include <iomanip>
 
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

[edit] See also

sets specific format flag
(public member function of std::ios_base) [edit]
clears the specified ios_base flags
(function) [edit]