140 lines
4.9 KiB
HTML
140 lines
4.9 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
|
<html>
|
|
<!-- Copyright (C) 1999-2016 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. -->
|
|
<!-- Created by GNU Texinfo 5.2, http://www.gnu.org/software/texinfo/ -->
|
|
<head>
|
|
<title>The GNU Fortran Compiler: FTELL</title>
|
|
|
|
<meta name="description" content="The GNU Fortran Compiler: FTELL">
|
|
<meta name="keywords" content="The GNU Fortran Compiler: FTELL">
|
|
<meta name="resource-type" content="document">
|
|
<meta name="distribution" content="global">
|
|
<meta name="Generator" content="makeinfo">
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
|
|
<link href="index.html#Top" rel="start" title="Top">
|
|
<link href="Option-Index.html#Option-Index" rel="index" title="Option Index">
|
|
<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
|
|
<link href="Intrinsic-Procedures.html#Intrinsic-Procedures" rel="up" title="Intrinsic Procedures">
|
|
<link href="GAMMA.html#GAMMA" rel="next" title="GAMMA">
|
|
<link href="FSTAT.html#FSTAT" rel="prev" title="FSTAT">
|
|
<style type="text/css">
|
|
<!--
|
|
a.summary-letter {text-decoration: none}
|
|
blockquote.smallquotation {font-size: smaller}
|
|
div.display {margin-left: 3.2em}
|
|
div.example {margin-left: 3.2em}
|
|
div.indentedblock {margin-left: 3.2em}
|
|
div.lisp {margin-left: 3.2em}
|
|
div.smalldisplay {margin-left: 3.2em}
|
|
div.smallexample {margin-left: 3.2em}
|
|
div.smallindentedblock {margin-left: 3.2em; font-size: smaller}
|
|
div.smalllisp {margin-left: 3.2em}
|
|
kbd {font-style:oblique}
|
|
pre.display {font-family: inherit}
|
|
pre.format {font-family: inherit}
|
|
pre.menu-comment {font-family: serif}
|
|
pre.menu-preformatted {font-family: serif}
|
|
pre.smalldisplay {font-family: inherit; font-size: smaller}
|
|
pre.smallexample {font-size: smaller}
|
|
pre.smallformat {font-family: inherit; font-size: smaller}
|
|
pre.smalllisp {font-size: smaller}
|
|
span.nocodebreak {white-space:nowrap}
|
|
span.nolinebreak {white-space:nowrap}
|
|
span.roman {font-family:serif; font-weight:normal}
|
|
span.sansserif {font-family:sans-serif; font-weight:normal}
|
|
ul.no-bullet {list-style: none}
|
|
-->
|
|
</style>
|
|
|
|
|
|
</head>
|
|
|
|
<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
|
|
<a name="FTELL"></a>
|
|
<div class="header">
|
|
<p>
|
|
Next: <a href="GAMMA.html#GAMMA" accesskey="n" rel="next">GAMMA</a>, Previous: <a href="FSTAT.html#FSTAT" accesskey="p" rel="prev">FSTAT</a>, Up: <a href="Intrinsic-Procedures.html#Intrinsic-Procedures" accesskey="u" rel="up">Intrinsic Procedures</a> [<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>
|
|
</div>
|
|
<hr>
|
|
<a name="FTELL-_002d_002d_002d-Current-stream-position"></a>
|
|
<h3 class="section">9.110 <code>FTELL</code> — Current stream position</h3>
|
|
<a name="index-FTELL"></a>
|
|
<a name="index-file-operation_002c-position-1"></a>
|
|
|
|
<dl compact="compact">
|
|
<dt><em>Description</em>:</dt>
|
|
<dd><p>Retrieves the current position within an open file.
|
|
</p>
|
|
<p>This intrinsic is provided in both subroutine and function forms; however,
|
|
only one form can be used in any given program unit.
|
|
</p>
|
|
</dd>
|
|
<dt><em>Standard</em>:</dt>
|
|
<dd><p>GNU extension
|
|
</p>
|
|
</dd>
|
|
<dt><em>Class</em>:</dt>
|
|
<dd><p>Subroutine, function
|
|
</p>
|
|
</dd>
|
|
<dt><em>Syntax</em>:</dt>
|
|
<dd><table>
|
|
<tr><td width="80%"><code>CALL FTELL(UNIT, OFFSET)</code></td></tr>
|
|
<tr><td width="80%"><code>OFFSET = FTELL(UNIT)</code></td></tr>
|
|
</table>
|
|
|
|
</dd>
|
|
<dt><em>Arguments</em>:</dt>
|
|
<dd><table>
|
|
<tr><td width="15%"><var>OFFSET</var></td><td width="70%">Shall of type <code>INTEGER</code>.</td></tr>
|
|
<tr><td width="15%"><var>UNIT</var></td><td width="70%">Shall of type <code>INTEGER</code>.</td></tr>
|
|
</table>
|
|
|
|
</dd>
|
|
<dt><em>Return value</em>:</dt>
|
|
<dd><p>In either syntax, <var>OFFSET</var> is set to the current offset of unit
|
|
number <var>UNIT</var>, or to <em>-1</em> if the unit is not currently open.
|
|
</p>
|
|
</dd>
|
|
<dt><em>Example</em>:</dt>
|
|
<dd><div class="smallexample">
|
|
<pre class="smallexample">PROGRAM test_ftell
|
|
INTEGER :: i
|
|
OPEN(10, FILE="temp.dat")
|
|
CALL ftell(10,i)
|
|
WRITE(*,*) i
|
|
END PROGRAM
|
|
</pre></div>
|
|
|
|
</dd>
|
|
<dt><em>See also</em>:</dt>
|
|
<dd><p><a href="FSEEK.html#FSEEK">FSEEK</a>
|
|
</p></dd>
|
|
</dl>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
</body>
|
|
</html>
|