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| <h3 class="section">8.88 <code>FNUM</code> — File number function</h3> |
| |
| <p><a name="index-FNUM-646"></a><a name="index-file-operation_002c-file-number-647"></a> |
| <dl> |
| <dt><em>Description</em>:<dd><code>FNUM(UNIT)</code> returns the POSIX file descriptor number corresponding to the |
| open Fortran I/O unit <code>UNIT</code>. |
| |
| <br><dt><em>Standard</em>:<dd>GNU extension |
| |
| <br><dt><em>Class</em>:<dd>Function |
| |
| <br><dt><em>Syntax</em>:<dd><code>RESULT = FNUM(UNIT)</code> |
| |
| <br><dt><em>Arguments</em>:<dd> |
| <p><table summary=""><tr align="left"><td valign="top" width="15%"><var>UNIT</var> </td><td valign="top" width="70%">The type shall be <code>INTEGER</code>. |
| <br></td></tr></table> |
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| <br><dt><em>Return value</em>:<dd>The return value is of type <code>INTEGER</code> |
| |
| <br><dt><em>Example</em>:<dd> |
| <pre class="smallexample"> program test_fnum |
| integer :: i |
| open (unit=10, status = "scratch") |
| i = fnum(10) |
| print *, i |
| close (10) |
| end program test_fnum |
| </pre> |
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