154 lines
6.0 KiB
HTML
154 lines
6.0 KiB
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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Invariant Sections being "Funding Free Software", the Front-Cover
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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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<!-- 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: GETARG</title>
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<meta name="description" content="The GNU Fortran Compiler: GETARG">
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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="GET_005fCOMMAND.html#GET_005fCOMMAND" rel="next" title="GET_COMMAND">
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<link href="GERROR.html#GERROR" rel="prev" title="GERROR">
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<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
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<a name="GETARG"></a>
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<div class="header">
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<p>
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Next: <a href="GET_005fCOMMAND.html#GET_005fCOMMAND" accesskey="n" rel="next">GET_COMMAND</a>, Previous: <a href="GERROR.html#GERROR" accesskey="p" rel="prev">GERROR</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="GETARG-_002d_002d_002d-Get-command-line-arguments"></a>
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<h3 class="section">9.113 <code>GETARG</code> — Get command line arguments</h3>
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<a name="index-GETARG"></a>
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<a name="index-command_002dline-arguments-1"></a>
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<a name="index-arguments_002c-to-program-1"></a>
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<dl compact="compact">
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<dt><em>Description</em>:</dt>
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<dd><p>Retrieve the <var>POS</var>-th argument that was passed on the
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command line when the containing program was invoked.
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</p>
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<p>This intrinsic routine is provided for backwards compatibility with
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GNU Fortran 77. In new code, programmers should consider the use of
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the <a href="GET_005fCOMMAND_005fARGUMENT.html#GET_005fCOMMAND_005fARGUMENT">GET_COMMAND_ARGUMENT</a> intrinsic defined by the Fortran 2003
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standard.
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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
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</p>
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</dd>
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<dt><em>Syntax</em>:</dt>
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<dd><p><code>CALL GETARG(POS, VALUE)</code>
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</p>
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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>POS</var></td><td width="70%">Shall be of type <code>INTEGER</code> and not wider than
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the default integer kind; <em><var>POS</var> \geq 0</em></td></tr>
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<tr><td width="15%"><var>VALUE</var></td><td width="70%">Shall be of type <code>CHARACTER</code> and of default
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kind.</td></tr>
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<tr><td width="15%"><var>VALUE</var></td><td width="70%">Shall be of type <code>CHARACTER</code>.</td></tr>
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</table>
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</dd>
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<dt><em>Return value</em>:</dt>
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<dd><p>After <code>GETARG</code> returns, the <var>VALUE</var> argument holds the
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<var>POS</var>th command line argument. If <var>VALUE</var> can not hold the
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argument, it is truncated to fit the length of <var>VALUE</var>. If there are
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less than <var>POS</var> arguments specified at the command line, <var>VALUE</var>
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will be filled with blanks. If <em><var>POS</var> = 0</em>, <var>VALUE</var> is set
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to the name of the program (on systems that support this feature).
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</p>
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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_getarg
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INTEGER :: i
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CHARACTER(len=32) :: arg
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DO i = 1, iargc()
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CALL getarg(i, arg)
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WRITE (*,*) arg
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END DO
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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>GNU Fortran 77 compatibility function: <a href="IARGC.html#IARGC">IARGC</a>
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</p>
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<p>Fortran 2003 functions and subroutines: <a href="GET_005fCOMMAND.html#GET_005fCOMMAND">GET_COMMAND</a>,
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<a href="GET_005fCOMMAND_005fARGUMENT.html#GET_005fCOMMAND_005fARGUMENT">GET_COMMAND_ARGUMENT</a>, <a href="COMMAND_005fARGUMENT_005fCOUNT.html#COMMAND_005fARGUMENT_005fCOUNT">COMMAND_ARGUMENT_COUNT</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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