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<title>The GNU Fortran Compiler: C_F_POINTER</title>
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Next: <a href="C_005fF_005fPROCPOINTER.html#C_005fF_005fPROCPOINTER" accesskey="n" rel="next">C_F_PROCPOINTER</a>, Previous: <a href="C_005fASSOCIATED.html#C_005fASSOCIATED" accesskey="p" rel="prev">C_ASSOCIATED</a>, Up: <a href="Intrinsic-Procedures.html#Intrinsic-Procedures" accesskey="u" rel="up">Intrinsic Procedures</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
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<a name="C_005fF_005fPOINTER-_002d_002d_002d-Convert-C-into-Fortran-pointer"></a>
<h3 class="section">9.49 <code>C_F_POINTER</code> &mdash; Convert C into Fortran pointer</h3>
<a name="index-C_005fF_005fPOINTER"></a>
<a name="index-pointer_002c-convert-C-to-Fortran"></a>
<dl compact="compact">
<dt><em>Description</em>:</dt>
<dd><p><code>C_F_POINTER(CPTR, FPTR[, SHAPE])</code> assigns the target of the C pointer
<var>CPTR</var> to the Fortran pointer <var>FPTR</var> and specifies its shape.
</p>
</dd>
<dt><em>Standard</em>:</dt>
<dd><p>Fortran 2003 and later
</p>
</dd>
<dt><em>Class</em>:</dt>
<dd><p>Subroutine
</p>
</dd>
<dt><em>Syntax</em>:</dt>
<dd><p><code>CALL C_F_POINTER(CPTR, FPTR[, SHAPE])</code>
</p>
</dd>
<dt><em>Arguments</em>:</dt>
<dd><table>
<tr><td width="15%"><var>CPTR</var></td><td width="70%">scalar of the type <code>C_PTR</code>. It is
<code>INTENT(IN)</code>.</td></tr>
<tr><td width="15%"><var>FPTR</var></td><td width="70%">pointer interoperable with <var>cptr</var>. It is
<code>INTENT(OUT)</code>.</td></tr>
<tr><td width="15%"><var>SHAPE</var></td><td 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>.</td></tr>
</table>
</dd>
<dt><em>Example</em>:</dt>
<dd><div class="smallexample">
<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></div>
</dd>
<dt><em>See also</em>:</dt>
<dd><p><a href="C_005fLOC.html#C_005fLOC">C_LOC</a>, <a href="C_005fF_005fPROCPOINTER.html#C_005fF_005fPROCPOINTER">C_F_PROCPOINTER</a>
</p></dd>
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