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class="VPLink link link" href="/c/notes/01_c-basic/02_xdx/" data-v-b8d55f3b><!--[--><p class="text" data-v-b8d55f3b>变量和进制</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-b8d55f3b data-v-b8d55f3b><div class="item" data-v-b8d55f3b><div class="indicator" data-v-b8d55f3b></div><a class="VPLink link link" href="/c/notes/01_c-basic/03_xdx/" data-v-b8d55f3b><!--[--><p class="text" data-v-b8d55f3b>数据类型和运算符</p><!--]--></a><!----></div><!----></div><!--]--></div></section></div><div class="group" data-v-575e6a36><div class="VPSidebarItem level-0 collapsible collapsed" data-v-575e6a36 data-v-b8d55f3b><div class="item" role="button" tabindex="0" data-v-b8d55f3b><div class="indicator" data-v-b8d55f3b></div><p class="text" data-v-b8d55f3b>C 语言高级</p><!----></div><!----></div></div><div class="group" data-v-575e6a36><div class="VPSidebarItem level-0 collapsible collapsed" data-v-575e6a36 data-v-b8d55f3b><div class="item" role="button" tabindex="0" 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class="spacer" data-v-3f215769></div><!--[--><!--]--><!----><!--[--><!--]--><!--[--><!--]--></div></div></div></div><div class="content" data-v-39a288b8><div class="content-container" data-v-39a288b8><!--[--><!--]--><main class="main" data-v-39a288b8><div style="position:relative;" class="vp-doc _c_notes_01_c-basic_03_xdx_" data-v-39a288b8><div><h1 id="第一章-数据类型-⭐" tabindex="-1">第一章：数据类型（⭐） <a class="header-anchor" href="#第一章-数据类型-⭐" aria-label="Permalink to "第一章：数据类型（⭐）""></a></h1><h2 id="_1-1-概述" tabindex="-1">1.1 概述 <a class="header-anchor" href="#_1-1-概述" aria-label="Permalink to "1.1 概述""></a></h2><ul><li><p>根据<code>变量</code>中<code>存储</code>的<code>值</code>的<code>不同</code>，我们可以将<code>变量</code>分为两类：</p><ul><li><code>普通变量</code>：变量所对应的内存中存储的是<code>普通值</code>。</li><li><code>指针变量</code>：变量所对应的内存中存储的是<code>另一个变量的地址</code>。</li></ul></li><li><p>如下图所示：</p></li></ul><p><img src="/c/assets/1.L8V3GBrc.png" alt=""></p><div class="note custom-block github-alert"><p class="custom-block-title">NOTE</p><p></p><p>普通变量和指针变量的相同点：</p><ul><li>普通变量有内存空间，指针变量也有内存空间。</li><li>普通变量有内存地址，指针变量也有内存地址。</li><li>普通变量所对应的内存空间中有值，指针变量所对应的内存空间中也有值。</li></ul><p>普通变量和指针变量的不同点：</p><ul><li>普通变量所对应的内存空间存储的是普通的值，如：整数、小数、字符等；指针变量所对应的内存空间存储的是另外一个变量的地址。</li><li>普通变量有普通变量的运算方式，而指针变量有指针变量的运算方式（后续讲解）。</li></ul></div><ul><li>那么，在 C 语言中变量的数据类型就可以这么划分，如下所示：</li></ul><p><img src="/c/assets/2.BkF1yWLn.png" alt=""></p><div class="note custom-block github-alert"><p class="custom-block-title">NOTE</p><p></p><ul><li>根据<code>普通变量</code>中存储的<code>值</code>的类型不同，可以将<code>普通变量类型</code>划分为<code>基本数据类型</code>（整型、字符类型、浮点类型、布尔类型）和<code>复合数据类型</code>（数组类型、结构体类型、共用体类型、枚举类型）。</li><li>根据<code>指针变量</code>所<code>指向空间</code>存储<code>值</code>的类型不同，可以将<code>指针类型</code>分为<code>基本数据类型指针</code>、<code>复合数据类型指针</code>、<code>函数指针</code>、<code>数组指针</code>等，例如：如果指针所指向的空间保存的是 int 类型，那么该指针就是 int 类型的指针。</li></ul></div><h2 id="_1-2-整数类型" tabindex="-1">1.2 整数类型 <a class="header-anchor" href="#_1-2-整数类型" 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