FPUTC.html 5.8 KB

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  19. <title>The GNU Fortran Compiler: FPUTC</title>
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  65. Next: <a href="FRACTION.html#FRACTION" accesskey="n" rel="next">FRACTION</a>, Previous: <a href="FPUT.html#FPUT" accesskey="p" rel="prev">FPUT</a>, Up: <a href="Intrinsic-Procedures.html#Intrinsic-Procedures" accesskey="u" rel="up">Intrinsic Procedures</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
  66. </div>
  67. <hr>
  68. <a name="FPUTC-_002d_002d_002d-Write-a-single-character-in-stream-mode"></a>
  69. <h3 class="section">9.112 <code>FPUTC</code> &mdash; Write a single character in stream mode</h3>
  70. <a name="index-FPUTC"></a>
  71. <a name="index-write-character_002c-stream-mode-1"></a>
  72. <a name="index-stream-mode_002c-write-character-1"></a>
  73. <a name="index-file-operation_002c-write-character-1"></a>
  74. <dl compact="compact">
  75. <dt><em>Description</em>:</dt>
  76. <dd><p>Write a single character in stream mode by bypassing normal formatted
  77. output. Stream I/O should not be mixed with normal record-oriented
  78. (formatted or unformatted) I/O on the same unit; the results are unpredictable.
  79. </p>
  80. <p>This intrinsic is provided in both subroutine and function forms; however,
  81. only one form can be used in any given program unit.
  82. </p>
  83. <p>Note that the <code>FGET</code> intrinsic is provided for backwards compatibility with
  84. <code>g77</code>. GNU Fortran provides the Fortran 2003 Stream facility.
  85. Programmers should consider the use of new stream IO feature in new code
  86. for future portability. See also <a href="Fortran-2003-status.html#Fortran-2003-status">Fortran 2003 status</a>.
  87. </p>
  88. </dd>
  89. <dt><em>Standard</em>:</dt>
  90. <dd><p>GNU extension
  91. </p>
  92. </dd>
  93. <dt><em>Class</em>:</dt>
  94. <dd><p>Subroutine, function
  95. </p>
  96. </dd>
  97. <dt><em>Syntax</em>:</dt>
  98. <dd><table>
  99. <tr><td width="80%"><code>CALL FPUTC(UNIT, C [, STATUS])</code></td></tr>
  100. <tr><td width="80%"><code>STATUS = FPUTC(UNIT, C)</code></td></tr>
  101. </table>
  102. </dd>
  103. <dt><em>Arguments</em>:</dt>
  104. <dd><table>
  105. <tr><td width="15%"><var>UNIT</var></td><td width="70%">The type shall be <code>INTEGER</code>.</td></tr>
  106. <tr><td width="15%"><var>C</var></td><td width="70%">The type shall be <code>CHARACTER</code> and of default
  107. kind.</td></tr>
  108. <tr><td width="15%"><var>STATUS</var></td><td width="70%">(Optional) status flag of type <code>INTEGER</code>.
  109. Returns 0 on success, -1 on end-of-file and a system specific positive
  110. error code otherwise.</td></tr>
  111. </table>
  112. </dd>
  113. <dt><em>Example</em>:</dt>
  114. <dd><div class="smallexample">
  115. <pre class="smallexample">PROGRAM test_fputc
  116. CHARACTER(len=10) :: str = &quot;gfortran&quot;
  117. INTEGER :: fd = 42, i
  118. OPEN(UNIT = fd, FILE = &quot;out&quot;, ACTION = &quot;WRITE&quot;, STATUS=&quot;NEW&quot;)
  119. DO i = 1, len_trim(str)
  120. CALL fputc(fd, str(i:i))
  121. END DO
  122. CLOSE(fd)
  123. END PROGRAM
  124. </pre></div>
  125. </dd>
  126. <dt><em>See also</em>:</dt>
  127. <dd><p><a href="FPUT.html#FPUT">FPUT</a>, <a href="FGET.html#FGET">FGET</a>, <a href="FGETC.html#FGETC">FGETC</a>
  128. </p></dd>
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