std::boolalpha,std::noboolalpha(3)

NAME
std::boolalpha,std::noboolalpha - std::boolalpha,std::noboolalpha

Synopsis
   Defined in header <ios>
   std::ios_base& boolalpha( std::ios_base& str ); (1)
   std::ios_base& noboolalpha( std::ios_base& str ); (2)
   1) Enables the boolalpha flag in the stream str as if by calling
   str.setf(std::ios_base::boolalpha).
   2) Disables the boolalpha flag in the stream str as if by calling
   str.unsetf(std::ios_base::boolalpha).
   std::boolalpha is an I/O manipulator, so it may be called with an expression such as
   out << std::boolalpha for any out of type std::basic_ostream or with an expression
   such as in >> std::boolalpha for any in of type std::basic_istream.

Parameters
   str - reference to I/O stream

Return value
   str (reference to the stream after manipulation).

Example
// Run this code
 #include <iostream>
 #include <sstream>
 int main()
 {
     // boolalpha output
     std::cout << "default true: " << true << '\n'
               << "default false: " << false << '\n'
               << std::boolalpha
               << "boolalpha true: " << true << '\n'
               << "boolalpha false: " << false << '\n'
               << std::noboolalpha
               << "noboolalpha true: " << true << '\n'
               << "noboolalpha false: " << false << '\n';
     // boolalpha parse
     bool b1, b2;
     std::istringstream is("true false");
     is >> std::boolalpha >> b1 >> b2;
     std::cout << '"' << is.str() << "\" parsed as: "
               << std::boolalpha << b1 << ' ' << b2 << '\n';
 }

Output:
 default true: 1
 default false: 0
 boolalpha true: true
 boolalpha false: false
 noboolalpha true: 1
 noboolalpha false: 0
 "true false" parsed as: true false

See also
   resetiosflags clears the specified ios_base flags
                 (function)
   setiosflags sets the specified ios_base flags
                 (function)
   do_truename provides the string to use as the name of the boolean true and false
   do_falsename (virtual protected member function of std::numpunct<CharT>)
   [virtual]