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| <h3 class="section">8.90 <code>FPUTC</code> — Write a single character in stream mode</h3> |
| |
| <p><a name="index-FPUTC-652"></a><a name="index-write-character_002c-stream-mode-653"></a><a name="index-stream-mode_002c-write-character-654"></a><a name="index-file-operation_002c-write-character-655"></a> |
| <dl> |
| <dt><em>Description</em>:<dd>Write a single character in stream mode 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>This intrinsic is provided in both subroutine and function forms; however, |
| only one form can be used in any given program unit. |
| |
| <p>Note that the <code>FGET</code> intrinsic is provided for backwards compatibility with |
| <samp><span class="command">g77</span></samp>. 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>. |
| |
| <br><dt><em>Standard</em>:<dd>GNU extension |
| |
| <br><dt><em>Class</em>:<dd>Subroutine, function |
| |
| <br><dt><em>Syntax</em>:<dd> |
| <p><table summary=""><tr align="left"><td valign="top" width="80%"><code>CALL FPUTC(UNIT, C [, STATUS])</code> |
| <br></td></tr><tr align="left"><td valign="top" width="80%"><code>STATUS = FPUTC(UNIT, C)</code> |
| <br></td></tr></table> |
| |
| <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><tr align="left"><td valign="top" width="15%"><var>C</var> </td><td valign="top" width="70%">The type shall be <code>CHARACTER</code> and of default |
| kind. |
| <br></td></tr><tr align="left"><td valign="top" width="15%"><var>STATUS</var> </td><td valign="top" 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. |
| <br></td></tr></table> |
| |
| <br><dt><em>Example</em>:<dd> |
| <pre class="smallexample"> PROGRAM test_fputc |
| CHARACTER(len=10) :: str = "gfortran" |
| INTEGER :: fd = 42, i |
| |
| OPEN(UNIT = fd, FILE = "out", ACTION = "WRITE", STATUS="NEW") |
| DO i = 1, len_trim(str) |
| CALL fputc(fd, str(i:i)) |
| END DO |
| CLOSE(fd) |
| END PROGRAM |
| </pre> |
| <br><dt><em>See also</em>:<dd><a href="FPUT.html#FPUT">FPUT</a>, <a href="FGET.html#FGET">FGET</a>, <a href="FGETC.html#FGETC">FGETC</a> |
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