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| <title>The GNU Fortran Compiler: FGET</title> |
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| <a name="FGET-_002d_002d_002d-Read-a-single-character-in-stream-mode-from-stdin"></a> |
| <h3 class="section">8.84 <code>FGET</code> — Read a single character in stream mode from stdin</h3> |
| <a name="index-FGET"></a> |
| <a name="index-read-character_002c-stream-mode"></a> |
| <a name="index-stream-mode_002c-read-character"></a> |
| <a name="index-file-operation_002c-read-character"></a> |
| |
| <dl compact="compact"> |
| <dt><em>Description</em>:</dt> |
| <dd><p>Read a single character in stream mode from stdin by bypassing normal |
| formatted output. Stream I/O should not be mixed with normal record-oriented |
| (formatted or unformatted) I/O on the same unit; the results are unpredictable. |
| </p> |
| <p>This intrinsic is provided in both subroutine and function forms; however, |
| only one form can be used in any given program unit. |
| </p> |
| <p>Note that the <code>FGET</code> intrinsic is provided for backwards compatibility with |
| <code>g77</code>. GNU Fortran provides the Fortran 2003 Stream facility. |
| Programmers should consider the use of new stream IO feature in new code |
| for future portability. See also <a href="Fortran-2003-status.html#Fortran-2003-status">Fortran 2003 status</a>. |
| </p> |
| </dd> |
| <dt><em>Standard</em>:</dt> |
| <dd><p>GNU extension |
| </p> |
| </dd> |
| <dt><em>Class</em>:</dt> |
| <dd><p>Subroutine, function |
| </p> |
| </dd> |
| <dt><em>Syntax</em>:</dt> |
| <dd><table> |
| <tr><td width="80%"><code>CALL FGET(C [, STATUS])</code></td></tr> |
| <tr><td width="80%"><code>STATUS = FGET(C)</code></td></tr> |
| </table> |
| |
| </dd> |
| <dt><em>Arguments</em>:</dt> |
| <dd><table> |
| <tr><td width="15%"><var>C</var></td><td width="70%">The type shall be <code>CHARACTER</code> and of default |
| kind.</td></tr> |
| <tr><td width="15%"><var>STATUS</var></td><td width="70%">(Optional) status flag of type <code>INTEGER</code>. |
| Returns 0 on success, -1 on end-of-file, and a system specific positive |
| error code otherwise.</td></tr> |
| </table> |
| |
| </dd> |
| <dt><em>Example</em>:</dt> |
| <dd><div class="smallexample"> |
| <pre class="smallexample">PROGRAM test_fget |
| INTEGER, PARAMETER :: strlen = 100 |
| INTEGER :: status, i = 1 |
| CHARACTER(len=strlen) :: str = "" |
| |
| WRITE (*,*) 'Enter text:' |
| DO |
| CALL fget(str(i:i), status) |
| if (status /= 0 .OR. i > strlen) exit |
| i = i + 1 |
| END DO |
| WRITE (*,*) TRIM(str) |
| END PROGRAM |
| </pre></div> |
| |
| </dd> |
| <dt><em>See also</em>:</dt> |
| <dd><p><a href="FGETC.html#FGETC">FGETC</a>, <a href="FPUT.html#FPUT">FPUT</a>, <a href="FPUTC.html#FPUTC">FPUTC</a> |
| </p></dd> |
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