<html lang="en">
<head>
<title>C_F_POINTER - The GNU Fortran Compiler</title>
<meta http-equiv="Content-Type" content="text/html">
<meta name="description" content="The GNU Fortran Compiler">
<meta name="generator" content="makeinfo 4.13">
<link title="Top" rel="start" href="index.html#Top">
<link rel="up" href="Intrinsic-Procedures.html#Intrinsic-Procedures" title="Intrinsic Procedures">
<link rel="prev" href="C_005fASSOCIATED.html#C_005fASSOCIATED" title="C_ASSOCIATED">
<link rel="next" href="C_005fF_005fPROCPOINTER.html#C_005fF_005fPROCPOINTER" title="C_F_PROCPOINTER">
<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
<!--
Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3 or
any later version published by the Free Software Foundation; with the
Invariant Sections being ``Funding Free Software'', the Front-Cover
Texts being (a) (see below), and with the Back-Cover Texts being (b)
(see below). A copy of the license is included in the section entitled
``GNU Free Documentation License''.
(a) The FSF's Front-Cover Text is:
A GNU Manual
(b) The FSF's Back-Cover Text is:
You have freedom to copy and modify this GNU Manual, like GNU
software. Copies published by the Free Software Foundation raise
funds for GNU development.-->
<meta http-equiv="Content-Style-Type" content="text/css">
<style type="text/css"><!--
pre.display { font-family:inherit }
pre.format { font-family:inherit }
pre.smalldisplay { font-family:inherit; font-size:smaller }
pre.smallformat { font-family:inherit; font-size:smaller }
pre.smallexample { font-size:smaller }
pre.smalllisp { font-size:smaller }
span.sc { font-variant:small-caps }
span.roman { font-family:serif; font-weight:normal; }
span.sansserif { font-family:sans-serif; font-weight:normal; }
--></style>
</head>
<body>
<div class="node">
<a name="C_F_POINTER"></a>
<a name="C_005fF_005fPOINTER"></a>
<p>
Next: <a rel="next" accesskey="n" href="C_005fF_005fPROCPOINTER.html#C_005fF_005fPROCPOINTER">C_F_PROCPOINTER</a>,
Previous: <a rel="previous" accesskey="p" href="C_005fASSOCIATED.html#C_005fASSOCIATED">C_ASSOCIATED</a>,
Up: <a rel="up" accesskey="u" href="Intrinsic-Procedures.html#Intrinsic-Procedures">Intrinsic Procedures</a>
<hr>
</div>
<h3 class="section">8.39 <code>C_F_POINTER</code> — Convert C into Fortran pointer</h3>
<p><a name="index-C_005fF_005fPOINTER-475"></a><a name="index-pointer_002c-convert-C-to-Fortran-476"></a>
<dl>
<dt><em>Description</em>:<dd><code>C_F_POINTER(CPTR, FPTR[, SHAPE])</code> Assign the target the C pointer
<var>CPTR</var> to the Fortran pointer <var>FPTR</var> and specify its
shape.
<br><dt><em>Standard</em>:<dd>Fortran 2003 and later
<br><dt><em>Class</em>:<dd>Subroutine
<br><dt><em>Syntax</em>:<dd><code>CALL C_F_POINTER(CPTR, FPTR[, SHAPE])</code>
<br><dt><em>Arguments</em>:<dd>
<p><table summary=""><tr align="left"><td valign="top" width="15%"><var>CPTR</var> </td><td valign="top" width="70%">scalar of the type <code>C_PTR</code>. It is
<code>INTENT(IN)</code>.
<br></td></tr><tr align="left"><td valign="top" width="15%"><var>FPTR</var> </td><td valign="top" width="70%">pointer interoperable with <var>cptr</var>. It is
<code>INTENT(OUT)</code>.
<br></td></tr><tr align="left"><td valign="top" width="15%"><var>SHAPE</var> </td><td valign="top" width="70%">(Optional) Rank-one array of type <code>INTEGER</code>
with <code>INTENT(IN)</code>. It shall be present
if and only if <var>fptr</var> is an array. The size
must be equal to the rank of <var>fptr</var>.
<br></td></tr></table>
<br><dt><em>Example</em>:<dd>
<pre class="smallexample"> program main
use iso_c_binding
implicit none
interface
subroutine my_routine(p) bind(c,name='myC_func')
import :: c_ptr
type(c_ptr), intent(out) :: p
end subroutine
end interface
type(c_ptr) :: cptr
real,pointer :: a(:)
call my_routine(cptr)
call c_f_pointer(cptr, a, [12])
end program main
</pre>
<br><dt><em>See also</em>:<dd><a href="C_005fLOC.html#C_005fLOC">C_LOC</a>, <a href="C_005fF_005fPROCPOINTER.html#C_005fF_005fPROCPOINTER">C_F_PROCPOINTER</a>
</dl>
</body></html>
