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| <a name="GET_005fCOMMAND_005fARGUMENT-_002d_002d_002d-Get-command-line-arguments"></a> |
| <h3 class="section">8.100 <code>GET_COMMAND_ARGUMENT</code> — Get command line arguments</h3> |
| <a name="index-GET_005fCOMMAND_005fARGUMENT"></a> |
| <a name="index-command_002dline-arguments-3"></a> |
| <a name="index-arguments_002c-to-program-3"></a> |
| |
| <dl compact="compact"> |
| <dt><em>Description</em>:</dt> |
| <dd><p>Retrieve the <var>NUMBER</var>-th argument that was passed on the |
| command line when the containing program was invoked. |
| </p> |
| </dd> |
| <dt><em>Standard</em>:</dt> |
| <dd><p>Fortran 2003 and later |
| </p> |
| </dd> |
| <dt><em>Class</em>:</dt> |
| <dd><p>Subroutine |
| </p> |
| </dd> |
| <dt><em>Syntax</em>:</dt> |
| <dd><p><code>CALL GET_COMMAND_ARGUMENT(NUMBER [, VALUE, LENGTH, STATUS])</code> |
| </p> |
| </dd> |
| <dt><em>Arguments</em>:</dt> |
| <dd><table> |
| <tr><td width="15%"><var>NUMBER</var></td><td width="70%">Shall be a scalar of type <code>INTEGER</code> and of |
| default kind, <em><var>NUMBER</var> \geq 0</em></td></tr> |
| <tr><td width="15%"><var>VALUE</var></td><td width="70%">(Optional) Shall be a scalar of type <code>CHARACTER</code> |
| and of default kind.</td></tr> |
| <tr><td width="15%"><var>LENGTH</var></td><td width="70%">(Optional) Shall be a scalar of type <code>INTEGER</code> |
| and of default kind.</td></tr> |
| <tr><td width="15%"><var>STATUS</var></td><td width="70%">(Optional) Shall be a scalar of type <code>INTEGER</code> |
| and of default kind.</td></tr> |
| </table> |
| |
| </dd> |
| <dt><em>Return value</em>:</dt> |
| <dd><p>After <code>GET_COMMAND_ARGUMENT</code> returns, the <var>VALUE</var> argument holds the |
| <var>NUMBER</var>-th command line argument. If <var>VALUE</var> can not hold the argument, it is |
| truncated to fit the length of <var>VALUE</var>. If there are less than <var>NUMBER</var> |
| arguments specified at the command line, <var>VALUE</var> will be filled with blanks. |
| If <em><var>NUMBER</var> = 0</em>, <var>VALUE</var> is set to the name of the program (on |
| systems that support this feature). The <var>LENGTH</var> argument contains the |
| length of the <var>NUMBER</var>-th command line argument. If the argument retrieval |
| fails, <var>STATUS</var> is a positive number; if <var>VALUE</var> contains a truncated |
| command line argument, <var>STATUS</var> is -1; and otherwise the <var>STATUS</var> is |
| zero. |
| </p> |
| </dd> |
| <dt><em>Example</em>:</dt> |
| <dd><div class="smallexample"> |
| <pre class="smallexample">PROGRAM test_get_command_argument |
| INTEGER :: i |
| CHARACTER(len=32) :: arg |
| |
| i = 0 |
| DO |
| CALL get_command_argument(i, arg) |
| IF (LEN_TRIM(arg) == 0) EXIT |
| |
| WRITE (*,*) TRIM(arg) |
| i = i+1 |
| END DO |
| END PROGRAM |
| </pre></div> |
| |
| </dd> |
| <dt><em>See also</em>:</dt> |
| <dd><p><a href="GET_005fCOMMAND.html#GET_005fCOMMAND">GET_COMMAND</a>, <a href="COMMAND_005fARGUMENT_005fCOUNT.html#COMMAND_005fARGUMENT_005fCOUNT">COMMAND_ARGUMENT_COUNT</a> |
| </p></dd> |
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