<ostream>

Library:  Input/output

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The header <ostream> is part of the Input/output library of the Standard C++ library. It defines the class template basic_ostream and a number of inserters, and overloads of the function template operator<<() specialized for basic_ostream.

namespace std {
  template <class charT, class traits = char_traits<charT> >
  class basic_ostream;
  typedef basic_ostream<char> ostream;
  typedef basic_ostream<wchar_t> wostream;

  template <class charT, class traits>
  basic_ostream<charT, traits>&
  endl(basic_ostream<charT,traits>&);

  template <class charT, class traits>
  basic_ostream<charT, traits>&
  ends(basic_ostream<charT, traits>&);

  template <class charT, class traits>
  basic_ostream<charT, traits>&
  flush(basic_ostream<charT, traits>&);
}

basic_ostream

ISO/IEC 14882:1998 -- International Standard for Information Systems --Programming Language C++, Section 27.6