Dec 26, 2018  In the C programming language, input/output library refers to a family of class templates and supporting functions in the C Standard Library that implement stream-based input/output capabilities. The iostream file contains code that allows a C program to display output on the screen and read input from the keyboard. Jun 15, 2011. This Library is free software: you can redistribute it and/or modify. it under the terms of the GNU General Public License as published by. the Free Software Foundation, either version 3 of the License,.

• Iostream Functions
• Iostream Header File

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Iostream Functions

// Standard iostream objects -*- C++ -*-

// Copyright (C) 1997-2020 Free Software Foundation, Inc.

//

// This file is part of the GNU ISO C++ Library. This library is free

// software; you can redistribute it and/or modify it under the

// terms of the GNU General Public License as published by the

// Free Software Foundation; either version 3, or (at your option)

// any later version.

// This library is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

// GNU General Public License for more details.

// Under Section 7 of GPL version 3, you are granted additional

// permissions described in the GCC Runtime Library Exception, version

// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and

// a copy of the GCC Runtime Library Exception along with this program;

// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see

// <http://www.gnu.org/licenses/>.

/** @file include/iostream

* This is a Standard C++ Library header.

*/

//

// ISO C++ 14882: 27.3 Standard iostream objects

//

#ifndef _GLIBCXX_IOSTREAM

#define_GLIBCXX_IOSTREAM1

#pragma GCC system_header

#include<bits/c++config.h>

#include<ostream>

#include<istream>

namespacestd_GLIBCXX_VISIBILITY(default)

{

_GLIBCXX_BEGIN_NAMESPACE_VERSION

/**

* @name Standard Stream Objects

*

* The &lt;iostream&gt; header declares the eight <em>standard stream

* objects</em>. For other declarations, see

* http://gcc.gnu.org/onlinedocs/libstdc++/manual/io.html

* and the @link iosfwd I/O forward declarations @endlink

*

* They are required by default to cooperate with the global C

* library's @c FILE streams, and to be available during program

* startup and termination. For more information, see the section of the

* manual linked to above.

*/

//@{

extern istream cin; /// Linked to standard input

extern ostream cout; /// Linked to standard output

extern ostream cerr; /// Linked to standard error (unbuffered)

extern ostream clog; /// Linked to standard error (buffered)

#ifdef _GLIBCXX_USE_WCHAR_T

extern wistream wcin; /// Linked to standard input

extern wostream wcout; /// Linked to standard output

extern wostream wcerr; /// Linked to standard error (unbuffered)

extern wostream wclog; /// Linked to standard error (buffered)

#endif

//@}

// For construction of filebuffers for cout, cin, cerr, clog et. al.

static ios_base::Init __ioinit;

_GLIBCXX_END_NAMESPACE_VERSION

} // namespace

#endif/* _GLIBCXX_IOSTREAM */

Iostream Header File

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