31 lines
4.9 KiB
HTML
31 lines
4.9 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>基本概念</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-c_language_basic_concepts 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">基本概念</h1>
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<div id="bodyContent">
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<div id="contentSub"><span class="subpages">< <a href="c.html">c</a>‎ | <a href="c-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>本节提供描述 C 程序语言时指定用词的定义和所用概念。</p>
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<p>C 程序是包含<a href="c-language-declarations.html">声明</a>的一系列文本文件（通常是头文件和源文件）。它们会经过<a href="c-language-translation_phases.html">翻译</a>变成可执行程序，在操作系统调用其<a href="c-language-main_function.html">主函数</a>时被执行（除非它自己就是 OS 程序或其他<i>独立</i>程序，这种情况下入口点是编译器决定的）。</p>
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<p>某些词在 C 程序中拥有特别含义，它们是<a href="c-keyword.html">关键词</a>。其他词可用做<a href="c-language-identifier.html">标识符</a>，可用于标识<a href="c-language-object.html">对象</a>、<a href="c-language-functions.html">函数</a>、<a href="c-language-struct.html">结构体</a>、<a href="c-language-union.html">联合体</a>、或<a href="c-language-enum.html">枚举</a>标签、枚举成员、 <a href="c-language-typedef.html">typedef</a> 类型别名、<a href="c-language-statements.html#.E6.A0.87.E5.8F.B7">标号</a>或<a href="c-preprocessor-replace.html">宏</a>。</p>
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<p>每个标识符（除了宏）仅在程序的一部分中合法，这部分被称为<a href="c-language-scope.html">作用域</a>，而它们属于四种<a href="c-language-name_space.html">命名空间</a>之一。一些标识符拥有<a href="c-language-storage_duration.html">链接</a>，这会令它们出现于不同作用域或翻译单元时，指代同一实体。</p>
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<p>函数的定义包含一系列<a href="c-language-statements.html">语句</a>和<a href="c-language-declarations.html">声明</a>，其中有的包含<a href="c-language-expressions.html">表达式</a>，它指定程序要进行的计算。</p>
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<p><a href="c-language-declarations.html">声明</a>和<a href="c-language-expressions.html">表达式</a>创建、销毁、访问并操作<a href="c-language-object.html">对象</a>。C中每个<a href="c-language-object.html">对象</a>、<a href="c-language-functions.html">函数</a>及<a href="c-language-expressions.html">表达式</a>关联到一种<a href="c-language-types.html">类型</a>。</p>
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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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