107 lines
8.3 KiB
HTML
107 lines
8.3 KiB
HTML
<!DOCTYPE html>
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<html lang="zh" dir="ltr" class="client-nojs" xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh">
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<head><meta http-equiv="x-ua-compatible" content="ie=edge">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<title>continue 语句</title>
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<link rel="stylesheet" href="ext.css" />
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<link rel="stylesheet" href="site_modules.css" />
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</head>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_language_continue skin-cppreference2 action-view cpp-navbar">
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<div id="cpp-content-base">
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<div id="content"><a id="top"></a>
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<h1 id="firstHeading" class="firstHeading">continue 语句</h1>
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<div id="bodyContent">
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-language.html">language</a></span></div>
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<div id="mw-content-text" lang="zh" dir="ltr" class="mw-content-ltr" xml:lang="zh">
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<p>导致外围 <a href="cpp-language-for.html">for</a>、<a href="cpp-language-range-for.html">范围 for</a>、<a href="cpp-language-while.html">while</a> 或 <a href="cpp-language-do.html">do-while</a> 循环体的剩余部分被跳过。</p>
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<p>可以在不用它而用条件语句忽略循环的剩余部分显得笨拙时使用。</p>
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<h3><span class="mw-headline" id=".E8.AF.AD.E6.B3.95">语法</span></h3>
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<table class="t-sdsc-begin">
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<tr>
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<td colspan="10" class="t-sdsc-sep"></td>
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</tr>
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<tr class="t-sdsc">
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<td class="t-sdsc-nopad"><span class="t-spar">属性</span><span class="t-mark">(可选)</span> <code><b>continue</b></code> <code><b>;</b></code></td>
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<td class="t-sdsc-nopad"></td>
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<td class="t-sdsc-nopad"></td>
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</tr>
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<tr>
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<td colspan="10" class="t-sdsc-sep"></td>
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</tr>
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</table>
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<h3><span class="mw-headline" id=".E8.A7.A3.E9.87.8A">解释</span></h3>
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<p><code>continue</code> 语句导致跳转，如同用 <a href="cpp-language-goto.html">goto</a> 跳转到循环体末尾一样（它只能出现在 <a href="cpp-language-for.html">for</a>、<a href="cpp-language-range-for.html">范围 for</a>、<a href="cpp-language-while.html">while</a> 及 <a href="cpp-language-do.html">do-while</a> 循环的循环体内）。</p>
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<p>更确切地说，</p>
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<p>对于 <a href="cpp-language-while.html">while</a> 循环，它表现为：</p>
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<div dir="ltr" class="mw-geshi" style="text-align: left;">
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<div class="cpp source-cpp">
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<pre class="de1"><span class="kw1">while</span> <span class="br0">(</span><span class="coMULTI">/* ... */</span><span class="br0">)</span> <span class="br0">{</span>
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<span class="co1">// ... </span>
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<span class="kw1">continue</span><span class="sy4">;</span> <span class="co1">// 作用如同 goto contin;</span>
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<span class="co1">// ...</span>
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contin<span class="sy4">:;</span>
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<span class="br0">}</span></pre></div>
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</div>
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<p>对于 <a href="cpp-language-do.html">do-while</a> 循环，它表现为：</p>
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<div dir="ltr" class="mw-geshi" style="text-align: left;">
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<div class="cpp source-cpp">
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<pre class="de1"><span class="kw1">do</span> <span class="br0">{</span>
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<span class="co1">// ...</span>
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<span class="kw1">continue</span><span class="sy4">;</span> <span class="co1">// 作用如同 goto contin;</span>
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<span class="co1">// ...</span>
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contin<span class="sy4">:;</span>
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<span class="br0">}</span> <span class="kw1">while</span> <span class="br0">(</span><span class="coMULTI">/* ... */</span><span class="br0">)</span><span class="sy4">;</span></pre></div>
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</div>
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<p>对于 <a href="cpp-language-for.html">for</a> 和<a href="cpp-language-range-for.html">范围 for</a> 循环，它表现为：</p>
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<div dir="ltr" class="mw-geshi" style="text-align: left;">
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<div class="cpp source-cpp">
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<pre class="de1"><span class="kw1">for</span> <span class="br0">(</span><span class="coMULTI">/* ... */</span><span class="br0">)</span> <span class="br0">{</span>
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<span class="co1">// ...</span>
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<span class="kw1">continue</span><span class="sy4">;</span> <span class="co1">// 作用如同 goto contin;</span>
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<span class="co1">// ...</span>
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contin<span class="sy4">:;</span>
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<span class="br0">}</span></pre></div>
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</div>
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<h3><span class="mw-headline" id=".E5.85.B3.E9.94.AE.E8.AF.8D">关键词</span></h3>
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<p><a href="cpp-keyword-continue.html"><tt>continue</tt></a></p>
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<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">示例</span></h3>
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<div class="t-example">
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<div class="t-example-live-link"></div>
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<div dir="ltr" class="mw-geshi" style="text-align: left;">
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<div class="cpp source-cpp">
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<pre class="de1"><span class="co2">#include <iostream></span>
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<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
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<span class="br0">{</span>
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<span class="kw1">for</span> <span class="br0">(</span><span class="kw4">int</span> i <span class="sy1">=</span> <span class="nu0">0</span><span class="sy4">;</span> i <span class="sy1"><</span> <span class="nu0">10</span><span class="sy4">;</span> i<span class="sy2">++</span><span class="br0">)</span> <span class="br0">{</span>
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<span class="kw1">if</span> <span class="br0">(</span>i <span class="sy3">!</span><span class="sy1">=</span> <span class="nu0">5</span><span class="br0">)</span> <span class="kw1">continue</span><span class="sy4">;</span>
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<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1"><<</span> i <span class="sy1"><<</span> <span class="st0">" "</span><span class="sy4">;</span> <span class="co1">// 每次 i!=5 时跳过此语句</span>
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<span class="br0">}</span>
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<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1"><<</span> <span class="st0">'<span class="es1">\n</span>'</span><span class="sy4">;</span>
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<span class="kw1">for</span> <span class="br0">(</span><span class="kw4">int</span> j <span class="sy1">=</span> <span class="nu0">0</span><span class="sy4">;</span> j <span class="sy1"><</span> <span class="nu0">2</span><span class="sy4">;</span> j<span class="sy2">++</span><span class="br0">)</span> <span class="br0">{</span>
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<span class="kw1">for</span> <span class="br0">(</span><span class="kw4">int</span> k <span class="sy1">=</span> <span class="nu0">0</span><span class="sy4">;</span> k <span class="sy1"><</span> <span class="nu0">5</span><span class="sy4">;</span> k<span class="sy2">++</span><span class="br0">)</span> <span class="br0">{</span> <span class="co1">// continue 只会影响此循环</span>
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<span class="kw1">if</span> <span class="br0">(</span>k <span class="sy1">==</span> <span class="nu0">3</span><span class="br0">)</span> <span class="kw1">continue</span><span class="sy4">;</span>
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<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1"><<</span> j <span class="sy1"><<</span> k <span class="sy1"><<</span> <span class="st0">" "</span><span class="sy4">;</span> <span class="co1">// 每次 k==3 时跳过此语句</span>
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<span class="br0">}</span>
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<span class="br0">}</span>
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<span class="br0">}</span></pre></div>
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</div>
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<p>输出：</p>
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<div dir="ltr" class="mw-geshi" style="text-align: left;">
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<div class="text source-text">
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<pre class="de1">5
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00 01 02 04 10 11 12 14</pre></div>
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</div>
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</div>
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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">参阅</span></h3>
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<table class="t-dsc-begin"></table>
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</div>
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<div class="visualClear"></div>
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</div>
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</div>
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</div>
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</body>
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</html>
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