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<!DOCTYPE html>
<html lang="zh" dir="ltr" class="client-nojs" xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh">
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<title>&#25972;&#25968;&#24120;&#37327;</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-c_language_integer_constant skin-cppreference2 action-view cpp-navbar">
<div id="cpp-content-base">
<div id="content"><a id="top"></a>
<h1 id="firstHeading" class="firstHeading">&#25972;&#25968;&#24120;&#37327;</h1>
<div id="bodyContent">
<div id="contentSub"><span class="subpages">&lt; <a href="c.html">c</a>&lrm; | <a href="c-language.html">language</a></span></div>
<div id="mw-content-text" lang="zh" dir="ltr" class="mw-content-ltr" xml:lang="zh">
<p>&#20801;&#35768;&#25972;&#25968;&#31867;&#22411;&#30340;&#20540;&#30452;&#25509;&#29992;&#20110;&#34920;&#36798;&#24335;&#12290;</p>
<h3><span class="mw-headline" id=".E8.AF.AD.E6.B3.95">&#35821;&#27861;</span></h3>
<p>&#25972;&#25968;&#24120;&#37327;&#26159;&#25317;&#26377;&#19979;&#21015;&#31867;&#22411;&#30340;<a href="c-language-value_category.html">&#38750;&#24038;&#20540;</a>&#34920;&#36798;&#24335;</p>
<table class="t-sdsc-begin">
<tr>
<td colspan="10" class="t-sdsc-sep"></td>
</tr>
<tr class="t-sdsc">
<td><span class="t-spar">&#21313;&#36827;&#21046;&#24120;&#37327;</span> <span class="t-spar">&#25972;&#25968;&#21518;&#32512;</span><span class="t-mark">(&#21487;&#36873;)</span></td>
<td>(1)</td>
<td class="t-sdsc-nopad"></td>
</tr>
<tr>
<td colspan="10" class="t-sdsc-sep"></td>
</tr>
<tr class="t-sdsc">
<td><span class="t-spar">&#20843;&#36827;&#21046;&#24120;&#37327;</span> <span class="t-spar">&#25972;&#25968;&#21518;&#32512;</span><span class="t-mark">(&#21487;&#36873;)</span></td>
<td>(2)</td>
<td class="t-sdsc-nopad"></td>
</tr>
<tr>
<td colspan="10" class="t-sdsc-sep"></td>
</tr>
<tr class="t-sdsc">
<td><span class="t-spar">&#21313;&#20845;&#36827;&#21046;&#24120;&#37327;</span> <span class="t-spar">&#25972;&#25968;&#21518;&#32512;</span><span class="t-mark">(&#21487;&#36873;)</span></td>
<td>(3)</td>
<td class="t-sdsc-nopad"></td>
</tr>
<tr>
<td colspan="10" class="t-sdsc-sep"></td>
</tr>
<tr class="t-sdsc">
<td><span class="t-spar">&#20108;&#36827;&#21046;&#24120;&#37327;</span> <span class="t-spar">&#25972;&#25968;&#21518;&#32512;</span><span class="t-mark">(&#21487;&#36873;)</span></td>
<td>(4)</td>
<td><span class="t-mark-rev t-since-c23">(C23 &#36215;)</span></td>
</tr>
<tr>
<td colspan="10" class="t-sdsc-sep"></td>
</tr>
</table>
<p>&#20854;&#20013;</p>
<ul>
<li><span class="t-spar">&#21313;&#36827;&#21046;&#24120;&#37327;</span> &#26159;&#38750;&#38646;&#21313;&#36827;&#21046;&#25968;&#20301;&#65288; <code>1</code> &#12289; <code>2</code> &#12289; <code>3</code> &#12289; <code>4</code> &#12289; <code>5</code> &#12289; <code>6</code> &#12289; <code>7</code> &#12289; <code>8</code> &#12289; <code>9</code> &#65289;&#65292;&#36319;&#38543;&#38646;&#20010;&#25110;&#26356;&#22810;&#21313;&#36827;&#21046;&#25968;&#23383;&#65288; <code>0</code> &#12289; <code>1</code> &#12289; <code>2</code> &#12289; <code>3</code> &#12289; <code>4</code> &#12289; <code>5</code> &#12289; <code>6</code> &#12289; <code>7</code> &#12289; <code>8</code> &#12289; <code>9</code>&#65289;</li>
<li><span class="t-spar">&#20843;&#36827;&#21046;&#24120;&#37327;</span> &#26159;&#25968;&#23383;&#38646;&#65288; <code>0</code> &#65289;&#36319;&#38543;&#38646;&#20010;&#25110;&#26356;&#22810;&#20843;&#36827;&#21046;&#25968;&#20301;&#65288; <code>0</code> &#12289; <code>1</code> &#12289; <code>2</code> &#12289; <code>3</code> &#12289; <code>4</code> &#12289; <code>5</code> &#12289; <code>6</code> &#12289; <code>7</code> &#65289;</li>
<li><span class="t-spar">&#21313;&#20845;&#36827;&#21046;&#24120;&#37327;</span> &#26159;&#23383;&#31526;&#24207;&#21015; <code>0x</code> &#25110;&#23383;&#31526;&#24207;&#21015; <code>0X</code> &#36319;&#38543;&#19968;&#20010;&#25110;&#26356;&#22810;&#21313;&#20845;&#36827;&#21046;&#25968;&#20301;&#65288; <code>0</code> &#12289; <code>1</code> &#12289; <code>2</code> &#12289; <code>3</code>&#12289; <code>4</code>&#12289; <code>5</code> &#12289; <code>6</code> &#12289; <code>7</code> &#12289; <code>8</code> &#12289; <code>9</code> &#12289; <code>a</code> &#12289; <code>A</code> &#12289; <code>b</code> &#12289; <code>B</code> &#12289; <code>c</code> &#12289; <code>C</code> &#12289; <code>d</code> &#12289; <code>D</code>&#12289; <code>e</code> &#12289; <code>E</code> &#12289; <code>f</code> &#12289; <code>F</code> &#65289;</li>
<li><span class="t-spar">&#20108;&#36827;&#21046;&#24120;&#37327;</span> &#26159;&#23383;&#31526;&#24207;&#21015; <code>0b</code> &#25110;&#23383;&#31526;&#24207;&#21015; <code>0B</code> &#36319;&#38543;&#19968;&#20010;&#25110;&#26356;&#22810;&#20108;&#36827;&#21046;&#25968;&#20301;&#65288; <code>0</code> &#12289; <code>1</code> &#65289;</li>
<li><span class="t-spar">&#25972;&#25968;&#21518;&#32512;</span> &#65292;&#33509;&#25552;&#20379;&#21017;&#21487;&#21253;&#21547;&#19979;&#38754;&#19968;&#25110;&#20004;&#32773;&#65292;&#21487;&#20197;&#20219;&#20309;&#39034;&#24207;&#20986;&#29616;&#65306;</li>
</ul>
<dl>
<dd>
<ul>
<li><span class="t-spar">&#26080;&#31526;&#21495;&#21518;&#32512;</span> &#65288;&#23383;&#31526; <code>u</code> &#25110;&#23383;&#31526; <code>U</code> &#65289;</li>
<li><span class="t-spar">&#38271;&#21518;&#32512;</span> &#65288;&#23383;&#31526; <code>l</code> &#25110;&#23383;&#31526; <code>L</code> &#65289;<span class="t-rev-inl t-since-c99"><span>&#25110; <span class="t-spar">&#38271;&#38271;&#21518;&#32512;</span> &#65288;&#23383;&#31526;&#24207;&#21015; <code>ll</code> &#25110; <code>LL</code> &#65289;</span> <span><span class="t-mark-rev t-since-c99">(C99 &#36215;)</span></span></span></li>
</ul>
</dd>
</dl>
<table class="t-rev-begin">
<tr class="t-rev t-since-c23">
<td>
<p>&#25968;&#20301;&#38388;&#21487;&#25554;&#20837;&#20316;&#20026;&#20998;&#38548;&#31526;&#30340;&#21487;&#36873;&#30340;&#21333;&#24341;&#21495;&#65288;<code>&#39;</code>&#65289;&#12290;&#32534;&#35793;&#22120;&#20250;&#24573;&#30053;&#23427;&#20204;&#12290;</p>
</td>
<td><span class="t-mark-rev t-since-c23">(C23 &#36215;)</span></td>
</tr>
</table>
<h3><span class="mw-headline" id=".E8.A7.A3.E9.87.8A">&#35299;&#37322;</span></h3>
<div class="t-li1"><span class="t-li">1)</span> &#21313;&#36827;&#21046;&#25972;&#25968;&#24120;&#37327;&#65288;&#24213; 10 &#65292;&#39318;&#20301;&#20026;&#26368;&#39640;&#20301;&#65289;&#12290;</div>
<div class="t-li1"><span class="t-li">2)</span> &#20843;&#36827;&#21046;&#25972;&#25968;&#24120;&#37327;&#65288;&#24213; 8 &#65292;&#39318;&#20301;&#20026;&#26368;&#39640;&#20301;&#65289;&#12290;</div>
<div class="t-li1"><span class="t-li">3)</span> &#21313;&#20845;&#36827;&#21046;&#25972;&#25968;&#24120;&#37327;&#65288;&#24213; 16 &#65292;&#39318;&#20301;&#20026;&#26368;&#39640;&#20301;&#65292;&#23383;&#27597; &#39;a&#39; &#21040; &#39;f&#39; &#34920;&#31034;&#21313;&#36827;&#21046;&#20540; 10 &#21040; 15 &#65289;&#12290;</div>
<div class="t-li1"><span class="t-li">4)</span> &#20108;&#36827;&#21046;&#25972;&#25968;&#24120;&#37327;&#65288;&#24213; 2 &#65292;&#39318;&#20301;&#20026;&#26368;&#39640;&#20301;&#65289;&#12290;</div>
<p>&#19979;&#21015;&#23545;&#35937;&#34987;&#21021;&#22987;&#21270;&#20026;&#30456;&#21516;&#20540;&#65306;</p>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="c source-c">
<pre class="de1"><span class="kw4">int</span> d <span class="sy1">=</span> <span class="nu0">42</span><span class="sy4">;</span>
<span class="kw4">int</span> o <span class="sy1">=</span> <span class="nu8">052</span><span class="sy4">;</span>
<span class="kw4">int</span> x <span class="sy1">=</span> <span class="nu12">0x2a</span><span class="sy4">;</span>
<span class="kw4">int</span> X <span class="sy1">=</span> <span class="nu12">0X2A</span><span class="sy4">;</span>
<span class="kw4">int</span> b <span class="sy1">=</span> <span class="nu6">0b101010</span><span class="sy4">;</span> <span class="co1">// C23</span></pre></div>
</div>
<p>&#19979;&#21015;&#23545;&#35937;&#20063;&#34987;&#21021;&#22987;&#21270;&#20026;&#30456;&#21516;&#20540;&#65306;</p>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="c source-c">
<pre class="de1"><span class="kw4">unsigned</span> <span class="kw4">long</span> <span class="kw4">long</span> l1 <span class="sy1">=</span> 18446744073709550592ull<span class="sy4">;</span> <span class="co1">// C99</span>
<span class="kw4">unsigned</span> <span class="kw4">long</span> <span class="kw4">long</span> l2 <span class="sy1">=</span> <span class="nu0">18</span><span class="st0">&#39;446&#39;</span><span class="nu0">744</span><span class="st0">&#39;073&#39;</span><span class="nu0">709</span><span class="st0">&#39;550&#39;</span>592llu<span class="sy4">;</span> <span class="co1">// C23</span>
<span class="kw4">unsigned</span> <span class="kw4">long</span> <span class="kw4">long</span> l3 <span class="sy1">=</span> <span class="nu0">1844</span><span class="st0">&#39;6744&#39;</span><span class="nu8">0737</span><span class="st0">&#39;0955&#39;</span>0592uLL<span class="sy4">;</span> <span class="co1">// C23</span>
<span class="kw4">unsigned</span> <span class="kw4">long</span> <span class="kw4">long</span> l4 <span class="sy1">=</span> <span class="nu0">184467</span><span class="st0">&#39;440737&#39;</span><span class="nu0">0</span><span class="st0">&#39;95505&#39;</span>92LLU<span class="sy4">;</span> <span class="co1">// C23</span></pre></div>
</div>
<h3><span class="mw-headline" id=".E6.95.B4.E6.95.B0.E5.B8.B8.E9.87.8F.E7.9A.84.E7.B1.BB.E5.9E.8B">&#25972;&#25968;&#24120;&#37327;&#30340;&#31867;&#22411;</span></h3>
<p>&#25972;&#25968;&#24120;&#37327;&#31867;&#22411;&#26159;&#20174;&#20381;&#36182;&#25968;&#23383;&#24213;&#21644;&#25152;&#29992; <span class="t-spar">&#25972;&#25968;&#21518;&#32512;</span> &#30340;&#31867;&#22411;&#21015;&#34920;&#20013;&#65292;&#20540;&#25152;&#33021;&#21563;&#21512;&#30340;&#39318;&#20010;&#31867;&#22411;&#12290;</p>
<table class="wikitable">
<tr style="text-align:center">
<th colspan="3">&#20801;&#35768;&#30340;&#25972;&#25968;&#24120;&#37327;&#31867;&#22411;</th>
</tr>
<tr style="text-align:center">
<td>&#21518;&#32512;</td>
<td>&#21313;&#36827;&#21046;&#24213;</td>
<td>&#20854;&#20182;&#24213;</td>
</tr>
<tr style="text-align:left">
<td>&#26080;&#21518;&#32512;</td>
<td><span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">int</span></span></span>
<p><span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">long</span> <span class="kw4">int</span></span></span><br />
<span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">unsigned</span> <span class="kw4">long</span> <span class="kw4">int</span></span></span> <span class="t-mark-rev t-until-c99">(C99 &#21069;)</span><br />
<span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">long</span> <span class="kw4">long</span> <span class="kw4">int</span></span></span> <span class="t-mark-rev t-since-c99">(C99 &#36215;)</span></p>
</td>
<td><span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">int</span></span></span>
<p><span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">unsigned</span> <span class="kw4">int</span></span></span><br />
<span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">long</span> <span class="kw4">int</span></span></span><br />
<span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">unsigned</span> <span class="kw4">long</span> <span class="kw4">int</span></span></span><br />
<span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">long</span> <span class="kw4">long</span> <span class="kw4">int</span></span></span><span class="t-mark-rev t-since-c99">(C99 &#36215;)</span><br />
<span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">unsigned</span> <span class="kw4">long</span> <span class="kw4">long</span> <span class="kw4">int</span></span></span><span class="t-mark-rev t-since-c99">(C99 &#36215;)</span></p>
</td>
</tr>
<tr>
<td><code>u</code> &#25110; <code>U</code></td>
<td><span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">unsigned</span> <span class="kw4">int</span></span></span>
<p><span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">unsigned</span> <span class="kw4">long</span> <span class="kw4">int</span></span></span><br />
<span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">unsigned</span> <span class="kw4">long</span> <span class="kw4">long</span> <span class="kw4">int</span></span></span><span class="t-mark-rev t-since-c99">(C99 &#36215;)</span></p>
</td>
<td><span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">unsigned</span> <span class="kw4">int</span></span></span>
<p><span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">unsigned</span> <span class="kw4">long</span> <span class="kw4">int</span></span></span><br />
<span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">unsigned</span> <span class="kw4">long</span> <span class="kw4">long</span> <span class="kw4">int</span></span></span><span class="t-mark-rev t-since-c99">(C99 &#36215;)</span></p>
</td>
</tr>
<tr>
<td><code>l</code> &#25110; <code>L</code></td>
<td><span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">long</span> <span class="kw4">int</span></span></span>
<p><span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">unsigned</span> <span class="kw4">long</span> <span class="kw4">int</span></span></span><span class="t-mark-rev t-until-c99">(C99 &#21069;)</span><br />
<span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">long</span> <span class="kw4">long</span> <span class="kw4">int</span></span></span><span class="t-mark-rev t-since-c99">(C99 &#36215;)</span></p>
</td>
<td><span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">long</span> <span class="kw4">int</span></span></span>
<p><span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">unsigned</span> <span class="kw4">long</span> <span class="kw4">int</span></span></span><br />
<span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">long</span> <span class="kw4">long</span> <span class="kw4">int</span></span></span><span class="t-mark-rev t-since-c99">(C99 &#36215;)</span><br />
<span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">unsigned</span> <span class="kw4">long</span> <span class="kw4">long</span> <span class="kw4">int</span></span></span><span class="t-mark-rev t-since-c99">(C99 &#36215;)</span></p>
</td>
</tr>
<tr>
<td><code>l</code>/<code>L</code> &#19982; <code>u</code>/<code>U</code></td>
<td><span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">unsigned</span> <span class="kw4">long</span> <span class="kw4">int</span></span></span>
<p><span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">unsigned</span> <span class="kw4">long</span> <span class="kw4">long</span> <span class="kw4">int</span></span></span><span class="t-mark-rev t-since-c99">(C99 &#36215;)</span></p>
</td>
<td><span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">unsigned</span> <span class="kw4">long</span> <span class="kw4">int</span></span></span>
<p><span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">unsigned</span> <span class="kw4">long</span> <span class="kw4">long</span> <span class="kw4">int</span></span></span><span class="t-mark-rev t-since-c99">(C99 &#36215;)</span></p>
</td>
</tr>
<tr>
<td><code>ll</code> &#25110; <code>LL</code></td>
<td><span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">long</span> <span class="kw4">long</span> <span class="kw4">int</span></span></span><span class="t-mark-rev t-since-c99">(C99 &#36215;)</span></td>
<td><span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">long</span> <span class="kw4">long</span> <span class="kw4">int</span></span></span><span class="t-mark-rev t-since-c99">(C99 &#36215;)</span>
<p><span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">unsigned</span> <span class="kw4">long</span> <span class="kw4">long</span> <span class="kw4">int</span></span></span><span class="t-mark-rev t-since-c99">(C99 &#36215;)</span></p>
</td>
</tr>
<tr>
<td><code>ll</code>/<code>LL</code> &#19982; <code>u</code>/<code>U</code></td>
<td><span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">unsigned</span> <span class="kw4">long</span> <span class="kw4">long</span> <span class="kw4">int</span></span></span><span class="t-mark-rev t-since-c99">(C99 &#36215;)</span></td>
<td><span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">unsigned</span> <span class="kw4">long</span> <span class="kw4">long</span> <span class="kw4">int</span></span></span><span class="t-mark-rev t-since-c99">(C99 &#36215;)</span></td>
</tr>
</table>
<p>&#33509;&#25972;&#25968;&#24120;&#37327;&#36807;&#22823;&#20174;&#32780;&#26080;&#27861;&#31526;&#21512;&#21518;&#32512;/&#24213;&#32467;&#21512;&#25152;&#20801;&#35768;&#30340;&#20219;&#20309;&#31867;&#22411;&#65292;&#19988;&#32534;&#35793;&#22120;&#25903;&#25345;&#25193;&#23637;&#25972;&#25968;&#31867;&#22411;&#65288;&#35692;&#22914; <span class="t-c"><span class="mw-geshi c source-c">__int128</span></span> &#65289;&#65292;&#21017;&#24120;&#37327;&#21487;&#33021;&#20197;&#25193;&#23637;&#25972;&#25968;&#31867;&#22411;&#32473;&#20986;&#65307;&#21542;&#21017;&#31243;&#24207;&#20026;&#35884;&#26500;&#12290;</p>
<h3><span class="mw-headline" id=".E6.B3.A8.E8.A7.A3">&#27880;&#35299;</span></h3>
<p>&#25972;&#25968;&#24120;&#37327;&#20013;&#30340;&#23383;&#27597;&#26080;&#20851;&#22823;&#23567;&#20889;&#65306; <code>0xDeAdBaBeU</code> &#21644; <code>0XdeadBABEu</code> &#34920;&#31034;&#21516;&#19968;&#20010;&#25968;<span class="t-rev-inl t-since-c99"><span>&#65288;&#19968;&#20010;&#20363;&#22806;&#26159; <span class="t-spar">long-long-suffix</span> &#65292;&#24517;&#39035;&#26159; <code>ll</code> &#25110; <code>LL</code> &#65292;&#19981;&#33021;&#26159; <code>lL</code> &#25110; <code>Ll</code> &#65289;</span> <span><span class="t-mark-rev t-since-c99">(C99 &#36215;)</span></span></span>&#12290;</p>
<p>&#27809;&#26377;&#36127;&#25972;&#25968;&#24120;&#37327;&#12290;&#22914; <span class="t-c"><span class="mw-geshi c source-c"><span class="sy2">-</span><span class="nu0">1</span></span></span> &#30340;&#34920;&#36798;&#24335;&#26159;&#23558;<a href="c-language-operator_arithmetic.html">&#19968;&#20803;&#36127;&#36816;&#31639;&#31526;</a>&#24212;&#29992;&#21040;&#24120;&#37327;&#25152;&#34920;&#31034;&#30340;&#20540;&#65292;&#21487;&#33021;&#20250;&#24341;&#36215;&#38544;&#24335;<a href="c-language-conversion.html">&#31867;&#22411;&#36716;&#25442;</a>&#12290;</p>
<table class="t-rev-begin">
<tr class="t-rev t-since-c99">
<td>
<p>&#24403;&#29992;&#20110; <a href="c-preprocessor-conditional.html"><tt>#if</tt></a> &#25110; <a href="c-preprocessor-conditional.html"><tt>#elif</tt></a> &#30340;&#25511;&#21046;&#34920;&#36798;&#24335;&#26102;&#65292;&#25152;&#26377;&#26377;&#31526;&#21495;&#25972;&#25968;&#24120;&#37327;&#37117;&#34920;&#29616;&#20026;&#22914;&#21516;&#25317;&#26377; <span class="t-lc"><a href="c-types-integer.html">intmax_t</a></span> &#31867;&#22411;&#65292;&#19988;&#25152;&#26377;&#26080;&#31526;&#21495;&#25972;&#25968;&#24120;&#37327;&#37117;&#34920;&#29616;&#20026;&#22914;&#21516;&#26377; <span class="t-lc"><a href="c-types-integer.html">uintmax_t</a></span> &#31867;&#22411;&#12290;</p>
</td>
<td><span class="t-mark-rev t-since-c99">(C99 &#36215;)</span></td>
</tr>
</table>
<p>&#25972;&#25968;&#24120;&#37327;&#21487;&#29992;&#20110;<a href="c-language-constant_expression.html">&#25972;&#25968;&#24120;&#37327;&#34920;&#36798;&#24335;</a>&#12290;</p>
<p>&#30001;&#20110;<a href="c-language-translation_phases.html#.E6.9C.80.E5.A4.A7.E5.90.9E.E5.99.AC">&#26368;&#22823;&#21534;&#22124;</a>&#35268;&#21017;&#65292;&#20197; <code>e</code> &#21644; <code>E</code> &#32467;&#26463;&#30340;&#21313;&#20845;&#36827;&#21046;&#25972;&#25968;&#24120;&#37327;&#22312;&#21518;&#38543;&#36816;&#31639;&#31526; <code>+</code> &#25110; <code>-</code> &#26102;&#65292;&#28304;&#30721;&#20013;&#24517;&#39035;&#20197;&#31354;&#30333;&#31526;&#25110;&#25324;&#21495;&#23558;&#23427;&#20204;&#19982;&#36816;&#31639;&#31526;&#20998;&#38548;&#65306;</p>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="c source-c">
<pre class="de1"><span class="kw4">int</span> x <span class="sy1">=</span> <span class="nu12">0xE</span><span class="sy2">+</span><span class="nu0">2</span><span class="sy4">;</span> <span class="co1">// &#38169;&#35823;</span>
<span class="kw4">int</span> y <span class="sy1">=</span> <span class="nu12">0xa</span><span class="sy2">+</span><span class="nu0">2</span><span class="sy4">;</span> <span class="co1">// OK</span>
<span class="kw4">int</span> z <span class="sy1">=</span> <span class="nu12">0xE</span> <span class="sy2">+</span><span class="nu0">2</span><span class="sy4">;</span> <span class="co1">// OK</span>
<span class="kw4">int</span> q <span class="sy1">=</span> <span class="br0">(</span><span class="nu12">0xE</span><span class="br0">)</span><span class="sy2">+</span><span class="nu0">2</span><span class="sy4">;</span> <span class="co1">// OK</span></pre></div>
</div>
<p>&#21542;&#21017;&#24418;&#25104;&#19968;&#20010;&#38750;&#27861;&#30340;&#39044;&#22788;&#29702;&#25968;&#23383;&#35760;&#21495;&#65292;&#36825;&#20250;&#36827;&#19968;&#27493;&#23548;&#33268;&#20998;&#26512;&#22833;&#36133;&#12290;</p>
<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">&#31034;&#20363;</span></h3>
<div class="t-example">
<div class="t-example-live-link"></div>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="c source-c">
<pre class="de1"><span class="co2">#include &lt;stdio.h&gt;</span>
<span class="co2">#include &lt;inttypes.h&gt;</span>
<span class="kw4">int</span> main<span class="br0">(</span><span class="kw4">void</span><span class="br0">)</span>
<span class="br0">{</span>
<a href="c-io-fprintf.html"><span class="kw851">printf</span></a><span class="br0">(</span><span class="st0">&quot;123 = %d<span class="es1">\n</span>&quot;</span>, <span class="nu0">123</span><span class="br0">)</span><span class="sy4">;</span>
<a href="c-io-fprintf.html"><span class="kw851">printf</span></a><span class="br0">(</span><span class="st0">&quot;0123 = %d<span class="es1">\n</span>&quot;</span>, <span class="nu8">0123</span><span class="br0">)</span><span class="sy4">;</span>
<a href="c-io-fprintf.html"><span class="kw851">printf</span></a><span class="br0">(</span><span class="st0">&quot;0x123 = %d<span class="es1">\n</span>&quot;</span>, <span class="nu12">0x123</span><span class="br0">)</span><span class="sy4">;</span>
<a href="c-io-fprintf.html"><span class="kw851">printf</span></a><span class="br0">(</span><span class="st0">&quot;12345678901234567890ull = %llu<span class="es1">\n</span>&quot;</span>, 12345678901234567890ull<span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#31867;&#22411;&#20026; 64 &#20301;&#31867;&#22411;&#65288; unsigned long long &#25110;&#21487;&#33021;&#30340; unsigned long &#65289;</span>
<span class="co1">// &#21363;&#20351;&#26080; long &#21518;&#32512;</span>
<a href="c-io-fprintf.html"><span class="kw851">printf</span></a><span class="br0">(</span><span class="st0">&quot;12345678901234567890u = %&quot;</span><a href="c-types-integer.html"><span class="kw207">PRIu64</span></a><span class="st0">&quot;<span class="es1">\n</span>&quot;</span>, 12345678901234567890u <span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// printf(&quot;%lld\n&quot;, -9223372036854775808); // &#38169;&#35823;</span>
<span class="co1">// &#20540; 9223372036854775808 &#19981;&#33021;&#36866;&#21512; signed long long &#65292;</span>
<span class="co1">// &#23427;&#26159;&#26080;&#21518;&#32512;&#21313;&#36827;&#21046;&#25972;&#25968;&#24120;&#37327;&#25152;&#20801;&#35768;&#30340;&#26368;&#22823;&#20540;</span>
<a href="c-io-fprintf.html"><span class="kw851">printf</span></a><span class="br0">(</span><span class="st0">&quot;%llu<span class="es1">\n</span>&quot;</span>, <span class="sy2">-</span>9223372036854775808ull <span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#24212;&#29992;&#21040;&#26080;&#31526;&#21495;&#20540;&#30340;&#19968;&#20803;&#20943;&#23558;&#23427;&#20174; 2^64 &#20943;&#21435;</span>
<span class="co1">// &#36825;&#32473;&#20986;&#26080;&#31526;&#21495; 9223372036854775808 </span>
<a href="c-io-fprintf.html"><span class="kw851">printf</span></a><span class="br0">(</span><span class="st0">&quot;%lld<span class="es1">\n</span>&quot;</span>, <span class="sy2">-</span>9223372036854775807ull <span class="sy2">-</span> <span class="nu0">1</span><span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#32452;&#25104;&#26377;&#31526;&#21495;&#20540; -9223372036854775808 &#30340;&#27491;&#30830;&#26041;&#24335;</span>
<span class="br0">}</span></pre></div>
</div>
<p>&#36755;&#20986;&#65306;</p>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="text source-text">
<pre class="de1">123 = 123
0123 = 83
0x123 = 291
12345678901234567890ull = 12345678901234567890
12345678901234567890u = 12345678901234567890
9223372036854775808
-9223372036854775808</pre></div>
</div>
</div>
<h3><span class="mw-headline" id=".E5.BC.95.E7.94.A8">&#24341;&#29992;</span></h3>
<div class="t-ref-std-17">
<ul>
<li>C17 &#26631;&#20934;&#65288;ISO/IEC 9899:2018&#65289;&#65306;</li>
</ul>
<dl>
<dd>
<ul>
<li>6.4.4.1 Integer constants (p: 45-46)</li>
</ul>
</dd>
</dl>
</div>
<div class="t-ref-std-11">
<ul>
<li>C11 &#26631;&#20934;&#65288;ISO/IEC 9899:2011&#65289;&#65306;</li>
</ul>
<dl>
<dd>
<ul>
<li>6.4.4.1 Integer constants (p: 62-64)</li>
</ul>
</dd>
</dl>
</div>
<div class="t-ref-std-c99">
<ul>
<li>C99 &#26631;&#20934;&#65288;ISO/IEC 9899:1999&#65289;&#65306;</li>
</ul>
<dl>
<dd>
<ul>
<li>6.4.4.1 Integer constants (p: 54-56)</li>
</ul>
</dd>
</dl>
</div>
<div class="t-ref-std-c89">
<ul>
<li>C89/C90 &#26631;&#20934;&#65288;ISO/IEC 9899:1990&#65289;&#65306;</li>
</ul>
<dl>
<dd>
<ul>
<li>3.1.3.2 Integer constants</li>
</ul>
</dd>
</dl>
</div>
<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">&#21442;&#38405;</span></h3>
<table class="t-dsc-begin"></table>
</div>
<div class="visualClear"></div>
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