130 lines
4.4 KiB
HTML
130 lines
4.4 KiB
HTML
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<title>The GNU Fortran Compiler: FNUM</title>
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<a name="FNUM"></a>
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<div class="header">
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<p>
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Next: <a href="FPUT.html#FPUT" accesskey="n" rel="next">FPUT</a>, Previous: <a href="FLUSH.html#FLUSH" accesskey="p" rel="prev">FLUSH</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="FNUM-_002d_002d_002d-File-number-function"></a>
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<h3 class="section">9.103 <code>FNUM</code> — File number function</h3>
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<a name="index-FNUM"></a>
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<a name="index-file-operation_002c-file-number"></a>
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<dl compact="compact">
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<dt><em>Description</em>:</dt>
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<dd><p><code>FNUM(UNIT)</code> returns the POSIX file descriptor number corresponding to the
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open Fortran I/O unit <code>UNIT</code>.
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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>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><p><code>RESULT = FNUM(UNIT)</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>UNIT</var></td><td width="70%">The type shall be <code>INTEGER</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>The return value is of type <code>INTEGER</code>
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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_fnum
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integer :: i
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open (unit=10, status = "scratch")
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i = fnum(10)
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print *, i
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close (10)
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end program test_fnum
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</pre></div>
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</dd>
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</dl>
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