154 lines
5.8 KiB
HTML
154 lines
5.8 KiB
HTML
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- Copyright (C) 1999-2016 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3 or
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any later version published by the Free Software Foundation; with the
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Invariant Sections being "Funding Free Software", the Front-Cover
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Texts being (a) (see below), and with the Back-Cover Texts being (b)
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(see below). A copy of the license is included in the section entitled
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"GNU Free Documentation License".
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(a) The FSF's Front-Cover Text is:
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A GNU Manual
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(b) The FSF's Back-Cover Text is:
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You have freedom to copy and modify this GNU Manual, like GNU
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software. Copies published by the Free Software Foundation raise
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funds for GNU development. -->
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<!-- Created by GNU Texinfo 5.2, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>The GNU Fortran Compiler: FGETC</title>
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<meta name="description" content="The GNU Fortran Compiler: FGETC">
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<meta name="keywords" content="The GNU Fortran Compiler: FGETC">
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<meta name="distribution" content="global">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Option-Index.html#Option-Index" rel="index" title="Option Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Intrinsic-Procedures.html#Intrinsic-Procedures" rel="up" title="Intrinsic Procedures">
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<link href="FLOOR.html#FLOOR" rel="next" title="FLOOR">
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<link href="FGET.html#FGET" rel="prev" title="FGET">
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<style type="text/css">
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-->
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</style>
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</head>
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<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
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<a name="FGETC"></a>
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<div class="header">
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<p>
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Next: <a href="FLOOR.html#FLOOR" accesskey="n" rel="next">FLOOR</a>, Previous: <a href="FGET.html#FGET" accesskey="p" rel="prev">FGET</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>
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</div>
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<hr>
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<a name="FGETC-_002d_002d_002d-Read-a-single-character-in-stream-mode"></a>
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<h3 class="section">9.100 <code>FGETC</code> — Read a single character in stream mode</h3>
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<a name="index-FGETC"></a>
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<a name="index-read-character_002c-stream-mode-1"></a>
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<a name="index-stream-mode_002c-read-character-1"></a>
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<a name="index-file-operation_002c-read-character-1"></a>
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<dl compact="compact">
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<dt><em>Description</em>:</dt>
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<dd><p>Read a single character in stream mode by bypassing normal formatted output.
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Stream I/O should not be mixed with normal record-oriented (formatted or
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unformatted) I/O on the same unit; the results are unpredictable.
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</p>
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<p>This intrinsic is provided in both subroutine and function forms; however,
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only one form can be used in any given program unit.
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</p>
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<p>Note that the <code>FGET</code> intrinsic is provided for backwards compatibility
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with <code>g77</code>. GNU Fortran provides the Fortran 2003 Stream facility.
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Programmers should consider the use of new stream IO feature in new code
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for future portability. See also <a href="Fortran-2003-status.html#Fortran-2003-status">Fortran 2003 status</a>.
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</p>
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</dd>
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<dt><em>Standard</em>:</dt>
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<dd><p>GNU extension
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</p>
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</dd>
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<dt><em>Class</em>:</dt>
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<dd><p>Subroutine, function
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</p>
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</dd>
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<dt><em>Syntax</em>:</dt>
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<dd><table>
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<tr><td width="80%"><code>CALL FGETC(UNIT, C [, STATUS])</code></td></tr>
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<tr><td width="80%"><code>STATUS = FGETC(UNIT, C)</code></td></tr>
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</table>
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</dd>
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<dt><em>Arguments</em>:</dt>
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<dd><table>
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<tr><td width="15%"><var>UNIT</var></td><td width="70%">The type shall be <code>INTEGER</code>.</td></tr>
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<tr><td width="15%"><var>C</var></td><td width="70%">The type shall be <code>CHARACTER</code> and of default
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kind.</td></tr>
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<tr><td width="15%"><var>STATUS</var></td><td width="70%">(Optional) status flag of type <code>INTEGER</code>.
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Returns 0 on success, -1 on end-of-file and a system specific positive
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error code otherwise.</td></tr>
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</table>
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</dd>
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<dt><em>Example</em>:</dt>
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<dd><div class="smallexample">
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<pre class="smallexample">PROGRAM test_fgetc
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INTEGER :: fd = 42, status
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CHARACTER :: c
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OPEN(UNIT=fd, FILE="/etc/passwd", ACTION="READ", STATUS = "OLD")
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DO
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CALL fgetc(fd, c, status)
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IF (status /= 0) EXIT
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call fput(c)
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END DO
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CLOSE(UNIT=fd)
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END PROGRAM
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</pre></div>
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</dd>
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<dt><em>See also</em>:</dt>
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<dd><p><a href="FGET.html#FGET">FGET</a>, <a href="FPUT.html#FPUT">FPUT</a>, <a href="FPUTC.html#FPUTC">FPUTC</a>
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</p></dd>
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</dl>
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</body>
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</html>
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