https://loveav.cn/tags/%E6%8C%87%E9%92%88/ Recent content in 指针 on 伊特瑞特 https://loveav.cn/%3Clink%20or%20path%20of%20image%20for%20opengraph,%20twitter-cards%3E https://loveav.cn/%3Clink%20or%20path%20of%20image%20for%20opengraph,%20twitter-cards%3E Hugo -- 0.134.3 zh-cn Thu, 14 Nov 2024 17:07:00 +0800 https://loveav.cn/posts/tech/c-pointer/ Thu, 14 Nov 2024 17:07:00 +0800 https://loveav.cn/posts/tech/c-pointer/ <h3 id="指针的基本概念">指针的基本概念</h3> <p>指针是一个变量，其值为另一个变量的地址。在 C 语言中，通过使用取地址运算符&amp;可以获取一个变量的地址，而通过指针变量可以存储和操作这些地址。例如：</p> <div class="highlight"><div class="chroma"> <table class="lntable"><tr><td class="lntd"> <pre tabindex="0" class="chroma"><code><span class="lnt">1 </span><span class="lnt">2 </span></code></pre></td> <td class="lntd"> <pre tabindex="0" class="chroma"><code class="language-c" data-lang="c"><span class="line"><span class="cl"><span class="kt">int</span> <span class="n">num</span> <span class="o">=</span> <span class="mi">10</span><span class="p">;</span> </span></span><span class="line"><span class="cl"><span class="kt">int</span> <span class="o">*</span><span class="n">ptr</span> <span class="o">=</span> <span class="o">&amp;</span><span class="n">num</span><span class="p">;</span> </span></span></code></pre></td></tr></table> </div> </div><p>在上述代码中，<code>num</code>是一个整型变量，<code>&amp;num</code>表示获取<code>num</code>的地址，<code>ptr</code>是一个指向整型的指针变量，它存储了<code>num</code>的地址。</p>