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 Next:&nbsp;<a rel="next" accesskey="n" href="Integers-implementation.html#Integers-implementation">Integers implementation</a>,
 Previous:&nbsp;<a rel="previous" accesskey="p" href="Identifiers-implementation.html#Identifiers-implementation">Identifiers implementation</a>,
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 <h3 class="section">4.4 Characters</h3>

      <ul>
 <li><cite>The number of bits in a byte (C90 3.4, C99 3.6).</cite>

      <p>Determined by ABI.

      <li><cite>The values of the members of the execution character set (C90
 and C99 5.2.1).</cite>

      <p>Determined by ABI.

      <li><cite>The unique value of the member of the execution character set produced
 for each of the standard alphabetic escape sequences (C90 and C99 5.2.2).</cite>

      <p>Determined by ABI.

      <li><cite>The value of a </cite><code>char</code><cite> object into which has been stored any
 character other than a member of the basic execution character set
 (C90 6.1.2.5, C99 6.2.5).</cite>

      <p>Determined by ABI.

      <li><cite>Which of </cite><code>signed char</code><cite> or </cite><code>unsigned char</code><cite> has the same
 range, representation, and behavior as &ldquo;plain&rdquo; </cite><code>char</code><cite> (C90
 6.1.2.5, C90 6.2.1.1, C99 6.2.5, C99 6.3.1.1).</cite>

      <p><a name="index-fsigned_002dchar-2393"></a><a name="index-funsigned_002dchar-2394"></a>Determined by ABI.  The options <samp><span class="option">-funsigned-char</span></samp> and
 <samp><span class="option">-fsigned-char</span></samp> change the default.  See <a href="C-Dialect-Options.html#C-Dialect-Options">Options Controlling C Dialect</a>.

      <li><cite>The mapping of members of the source character set (in character
 constants and string literals) to members of the execution character
 set (C90 6.1.3.4, C99 6.4.4.4, C90 and C99 5.1.1.2).</cite>

      <p>Determined by ABI.

      <li><cite>The value of an integer character constant containing more than one
 character or containing a character or escape sequence that does not map
 to a single-byte execution character (C90 6.1.3.4, C99 6.4.4.4).</cite>

      <p>See <a href="../cpp/Implementation_002ddefined-behavior.html#Implementation_002ddefined-behavior">Implementation-defined behavior</a>.

      <li><cite>The value of a wide character constant containing more than one
 multibyte character, or containing a multibyte character or escape
 sequence not represented in the extended execution character set (C90
 6.1.3.4, C99 6.4.4.4).</cite>

      <p>See <a href="../cpp/Implementation_002ddefined-behavior.html#Implementation_002ddefined-behavior">Implementation-defined behavior</a>.

      <li><cite>The current locale used to convert a wide character constant consisting
 of a single multibyte character that maps to a member of the extended
 execution character set into a corresponding wide character code (C90
 6.1.3.4, C99 6.4.4.4).</cite>

      <p>See <a href="../cpp/Implementation_002ddefined-behavior.html#Implementation_002ddefined-behavior">Implementation-defined behavior</a>.

      <li><cite>The current locale used to convert a wide string literal into
 corresponding wide character codes (C90 6.1.4, C99 6.4.5).</cite>

      <p>See <a href="../cpp/Implementation_002ddefined-behavior.html#Implementation_002ddefined-behavior">Implementation-defined behavior</a>.

      <li><cite>The value of a string literal containing a multibyte character or escape
 sequence not represented in the execution character set (C90 6.1.4, C99 6.4.5).</cite>

      <p>See <a href="../cpp/Implementation_002ddefined-behavior.html#Implementation_002ddefined-behavior">Implementation-defined behavior</a>.
 </ul>

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	<h3 class="section">4.4 Characters</h3>

	<ul>
	<li><cite>The number of bits in a byte (C90 3.4, C99 3.6).</cite>

	<p>Determined by ABI.

	<li><cite>The values of the members of the execution character set (C90
	and C99 5.2.1).</cite>

	<p>Determined by ABI.

	<li><cite>The unique value of the member of the execution character set produced
	for each of the standard alphabetic escape sequences (C90 and C99 5.2.2).</cite>

	<p>Determined by ABI.

	<li><cite>The value of a </cite><code>char</code><cite> object into which has been stored any
	character other than a member of the basic execution character set
	(C90 6.1.2.5, C99 6.2.5).</cite>

	<p>Determined by ABI.

	<li><cite>Which of </cite><code>signed char</code><cite> or </cite><code>unsigned char</code><cite> has the same
	range, representation, and behavior as “plain” </cite><code>char</code><cite> (C90
	6.1.2.5, C90 6.2.1.1, C99 6.2.5, C99 6.3.1.1).</cite>

	<p><a name="index-fsigned_002dchar-2393"></a><a name="index-funsigned_002dchar-2394"></a>Determined by ABI. The options <samp><span class="option">-funsigned-char</span></samp> and
	<samp><span class="option">-fsigned-char</span></samp> change the default. See <a href="C-Dialect-Options.html#C-Dialect-Options">Options Controlling C Dialect</a>.

	<li><cite>The mapping of members of the source character set (in character
	constants and string literals) to members of the execution character
	set (C90 6.1.3.4, C99 6.4.4.4, C90 and C99 5.1.1.2).</cite>

	<p>Determined by ABI.

	<li><cite>The value of an integer character constant containing more than one
	character or containing a character or escape sequence that does not map
	to a single-byte execution character (C90 6.1.3.4, C99 6.4.4.4).</cite>

	<p>See <a href="../cpp/Implementation_002ddefined-behavior.html#Implementation_002ddefined-behavior">Implementation-defined behavior</a>.

	<li><cite>The value of a wide character constant containing more than one
	multibyte character, or containing a multibyte character or escape
	sequence not represented in the extended execution character set (C90
	6.1.3.4, C99 6.4.4.4).</cite>

	<p>See <a href="../cpp/Implementation_002ddefined-behavior.html#Implementation_002ddefined-behavior">Implementation-defined behavior</a>.

	<li><cite>The current locale used to convert a wide character constant consisting
	of a single multibyte character that maps to a member of the extended
	execution character set into a corresponding wide character code (C90
	6.1.3.4, C99 6.4.4.4).</cite>

	<p>See <a href="../cpp/Implementation_002ddefined-behavior.html#Implementation_002ddefined-behavior">Implementation-defined behavior</a>.

	<li><cite>The current locale used to convert a wide string literal into
	corresponding wide character codes (C90 6.1.4, C99 6.4.5).</cite>

	<p>See <a href="../cpp/Implementation_002ddefined-behavior.html#Implementation_002ddefined-behavior">Implementation-defined behavior</a>.

	<li><cite>The value of a string literal containing a multibyte character or escape
	sequence not represented in the execution character set (C90 6.1.4, C99 6.4.5).</cite>

	<p>See <a href="../cpp/Implementation_002ddefined-behavior.html#Implementation_002ddefined-behavior">Implementation-defined behavior</a>.
	</ul>

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