You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
98 lines
4.0 KiB
HTML
98 lines
4.0 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
|
<html>
|
|
<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
|
|
<head>
|
|
<title>putchar (The Red Hat newlib C Library)</title>
|
|
|
|
<meta name="description" content="putchar (The Red Hat newlib C Library)">
|
|
<meta name="keywords" content="putchar (The Red Hat newlib C Library)">
|
|
<meta name="resource-type" content="document">
|
|
<meta name="distribution" content="global">
|
|
<meta name="Generator" content="makeinfo">
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
|
|
<link href="index.html#Top" rel="start" title="Top">
|
|
<link href="Document-Index.html#Document-Index" rel="index" title="Document Index">
|
|
<link href="Document-Index.html#SEC_Contents" rel="contents" title="Table of Contents">
|
|
<link href="Stdio.html#Stdio" rel="up" title="Stdio">
|
|
<link href="putchar_005funlocked.html#putchar_005funlocked" rel="next" title="putchar_unlocked">
|
|
<link href="putc_005funlocked.html#putc_005funlocked" rel="prev" title="putc_unlocked">
|
|
<style type="text/css">
|
|
<!--
|
|
a.summary-letter {text-decoration: none}
|
|
blockquote.indentedblock {margin-right: 0em}
|
|
blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
|
|
blockquote.smallquotation {font-size: smaller}
|
|
div.display {margin-left: 3.2em}
|
|
div.example {margin-left: 3.2em}
|
|
div.lisp {margin-left: 3.2em}
|
|
div.smalldisplay {margin-left: 3.2em}
|
|
div.smallexample {margin-left: 3.2em}
|
|
div.smalllisp {margin-left: 3.2em}
|
|
kbd {font-style: oblique}
|
|
pre.display {font-family: inherit}
|
|
pre.format {font-family: inherit}
|
|
pre.menu-comment {font-family: serif}
|
|
pre.menu-preformatted {font-family: serif}
|
|
pre.smalldisplay {font-family: inherit; font-size: smaller}
|
|
pre.smallexample {font-size: smaller}
|
|
pre.smallformat {font-family: inherit; font-size: smaller}
|
|
pre.smalllisp {font-size: smaller}
|
|
span.nolinebreak {white-space: nowrap}
|
|
span.roman {font-family: initial; font-weight: normal}
|
|
span.sansserif {font-family: sans-serif; font-weight: normal}
|
|
ul.no-bullet {list-style: none}
|
|
-->
|
|
</style>
|
|
|
|
|
|
</head>
|
|
|
|
<body lang="en">
|
|
<a name="putchar"></a>
|
|
<div class="header">
|
|
<p>
|
|
Next: <a href="putchar_005funlocked.html#putchar_005funlocked" accesskey="n" rel="next">putchar_unlocked</a>, Previous: <a href="putc_005funlocked.html#putc_005funlocked" accesskey="p" rel="prev">putc_unlocked</a>, Up: <a href="Stdio.html#Stdio" accesskey="u" rel="up">Stdio</a> [<a href="Document-Index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Document-Index.html#Document-Index" title="Index" rel="index">Index</a>]</p>
|
|
</div>
|
|
<hr>
|
|
<a name="putchar_002d_002d_002dwrite-a-character-_0028macro_0029"></a>
|
|
<h3 class="section">4.47 <code>putchar</code>—write a character (macro)</h3>
|
|
<a name="index-putchar"></a>
|
|
<a name="index-_005fputchar_005fr"></a>
|
|
<p><strong>Synopsis</strong>
|
|
</p><div class="example">
|
|
<pre class="example">#include <stdio.h>
|
|
int putchar(int <var>ch</var>);
|
|
|
|
int _putchar_r(struct _reent *<var>reent</var>, int <var>ch</var>);
|
|
|
|
</pre></div>
|
|
<p><strong>Description</strong><br>
|
|
<code>putchar</code> is a macro, defined in <code>stdio.h</code>. <code>putchar</code>
|
|
writes its argument to the standard output stream,
|
|
after converting it from an <code>int</code> to an <code>unsigned char</code>.
|
|
</p>
|
|
<p>The alternate function <code>_putchar_r</code> is a reentrant version. The
|
|
extra argument <var>reent</var> is a pointer to a reentrancy structure.
|
|
</p>
|
|
<br>
|
|
<p><strong>Returns</strong><br>
|
|
If successful, <code>putchar</code> returns its argument <var>ch</var>. If an error
|
|
intervenes, the result is <code>EOF</code>. You can use ‘<code>ferror(stdin)</code>’ to
|
|
query for errors.
|
|
</p>
|
|
<br>
|
|
<p><strong>Portability</strong><br>
|
|
ANSI C requires <code>putchar</code>; it suggests, but does not require, that
|
|
<code>putchar</code> be implemented as a macro.
|
|
</p>
|
|
<p>Supporting OS subroutines required: <code>close</code>, <code>fstat</code>, <code>isatty</code>,
|
|
<code>lseek</code>, <code>read</code>, <code>sbrk</code>, <code>write</code>.
|
|
</p>
|
|
<br>
|
|
|
|
|
|
|
|
|
|
</body>
|
|
</html>
|