https://blue-sky.tech/series/c%E8%AF%AD%E8%A8%80%E7%A8%8B%E5%BA%8F%E8%AE%BE%E8%AE%A1%E7%AC%94%E8%AE%B0/Recent content in C语言程序设计笔记 on Blue_Sky蓝天计划Hugo -- gohugo.iozh-cn3465179943@qq.com (Li)3465179943@qq.com (Li)© 2025 嵌入式开发者博客. 保留所有权利.Thu, 20 Nov 2025 00:00:00 +0000https://blue-sky.tech/notes/c-cpp/c/c%E8%AF%AD%E8%A8%80%E7%A8%8B%E5%BA%8F%E8%AE%BE%E8%AE%A1/p12-%E6%8C%87%E9%92%88%E5%92%8C%E6%95%B0%E7%BB%84/Thu, 20 Nov 2025 00:00:00 +00003465179943@qq.com (Li)https://blue-sky.tech/notes/c-cpp/c/c%E8%AF%AD%E8%A8%80%E7%A8%8B%E5%BA%8F%E8%AE%BE%E8%AE%A1/p12-%E6%8C%87%E9%92%88%E5%92%8C%E6%95%B0%E7%BB%84/<h2 class="relative group">(这里开始写正文&hellip;) <div id="这里开始写正文" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#%e8%bf%99%e9%87%8c%e5%bc%80%e5%a7%8b%e5%86%99%e6%ad%a3%e6%96%87" aria-label="锚点">#</a> </span> </h2> <h2 class="relative group">created: 2025-11-04T18:16 updated: 2025-11-04T19:16 <div id="updated-2025-11-04t1916" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#updated-2025-11-04t1916" aria-label="锚点">#</a> </span> </h2> <h1 class="relative group">指针的算数运算 <div id="指针的算数运算" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#%e6%8c%87%e9%92%88%e7%9a%84%e7%ae%97%e6%95%b0%e8%bf%90%e7%ae%97" aria-label="锚点">#</a> </span> </h1> <ul> <li>@ 指针的算术运算 <ul> <li>指针加上整数</li> <li>指针减去整数</li> <li>两个指针相减</li> </ul> </li> <li>! 在一个不指向任何数组元素的指针上执行算术运算会导致未定义的行为</li> <li>! <strong>只有在两个指针指向同一个数组时，把他们相减才有意义</strong></li> </ul> <h2 class="relative group">指针加上整数 &amp; 指针减去整数 <div id="指针加上整数--指针减去整数" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#%e6%8c%87%e9%92%88%e5%8a%a0%e4%b8%8a%e6%95%b4%e6%95%b0--%e6%8c%87%e9%92%88%e5%87%8f%e5%8e%bb%e6%95%b4%e6%95%b0" aria-label="锚点">#</a> </span> </h2> <div class="highlight"><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">a</span><span class="p">[</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">p</span> <span class="o">=</span> <span class="o">&amp;</span><span class="n">a</span><span class="p">[</span><span class="mi">0</span><span class="p">];</span> </span></span><span class="line"><span class="cl"><span class="n">p</span> <span class="o">=</span> <span class="n">p</span> <span class="o">+</span> <span class="mi">2</span><span class="p">;</span> <span class="c1">//指针向右移动两个位置 </span></span></span><span class="line"><span class="cl"><span class="c1"></span><span class="n">p</span> <span class="o">=</span> <span class="n">p</span> <span class="o">-</span> <span class="mi">2</span><span class="p">;</span> <span class="c1">//指针向左移动两个位置 </span></span></span></code></pre></div><p>![[Pasted image 20251104182339.png]]</p>