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| <title>The GNU Fortran Compiler: GETARG</title> |
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| <a name="GETARG-_002d_002d_002d-Get-command-line-arguments"></a> |
| <h3 class="section">9.112 <code>GETARG</code> — Get command line arguments</h3> |
| <a name="index-GETARG"></a> |
| <a name="index-command_002dline-arguments-1"></a> |
| <a name="index-arguments_002c-to-program-1"></a> |
| |
| <dl compact="compact"> |
| <dt><em>Description</em>:</dt> |
| <dd><p>Retrieve the <var>POS</var>-th argument that was passed on the |
| command line when the containing program was invoked. |
| </p> |
| <p>This intrinsic routine is provided for backwards compatibility with |
| GNU Fortran 77. In new code, programmers should consider the use of |
| the <a href="GET_005fCOMMAND_005fARGUMENT.html#GET_005fCOMMAND_005fARGUMENT">GET_COMMAND_ARGUMENT</a> intrinsic defined by the Fortran 2003 |
| standard. |
| </p> |
| </dd> |
| <dt><em>Standard</em>:</dt> |
| <dd><p>GNU extension |
| </p> |
| </dd> |
| <dt><em>Class</em>:</dt> |
| <dd><p>Subroutine |
| </p> |
| </dd> |
| <dt><em>Syntax</em>:</dt> |
| <dd><p><code>CALL GETARG(POS, VALUE)</code> |
| </p> |
| </dd> |
| <dt><em>Arguments</em>:</dt> |
| <dd><table> |
| <tr><td width="15%"><var>POS</var></td><td width="70%">Shall be of type <code>INTEGER</code> and not wider than |
| the default integer kind; <em><var>POS</var> \geq 0</em></td></tr> |
| <tr><td width="15%"><var>VALUE</var></td><td width="70%">Shall be of type <code>CHARACTER</code> and of default |
| kind.</td></tr> |
| <tr><td width="15%"><var>VALUE</var></td><td width="70%">Shall be of type <code>CHARACTER</code>.</td></tr> |
| </table> |
| |
| </dd> |
| <dt><em>Return value</em>:</dt> |
| <dd><p>After <code>GETARG</code> returns, the <var>VALUE</var> argument holds the |
| <var>POS</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>POS</var> arguments specified at the command line, <var>VALUE</var> |
| will be filled with blanks. If <em><var>POS</var> = 0</em>, <var>VALUE</var> is set |
| to the name of the program (on systems that support this feature). |
| </p> |
| </dd> |
| <dt><em>Example</em>:</dt> |
| <dd><div class="smallexample"> |
| <pre class="smallexample">PROGRAM test_getarg |
| INTEGER :: i |
| CHARACTER(len=32) :: arg |
| |
| DO i = 1, iargc() |
| CALL getarg(i, arg) |
| WRITE (*,*) arg |
| END DO |
| END PROGRAM |
| </pre></div> |
| |
| </dd> |
| <dt><em>See also</em>:</dt> |
| <dd><p>GNU Fortran 77 compatibility function: <a href="IARGC.html#IARGC">IARGC</a> |
| </p> |
| <p>Fortran 2003 functions and subroutines: <a href="GET_005fCOMMAND.html#GET_005fCOMMAND">GET_COMMAND</a>, |
| <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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