https://111qqz.com/tags/c%E8%AF%AD%E8%A8%80/Recent content in C语言 on 111qqzHugo -- gohugo.iozh-cn© 2015-2026 111qqzFri, 01 Feb 2019 11:19:29 +0000https://111qqz.com/2019/02/variadic-function-of-c/Fri, 01 Feb 2019 11:19:29 +0000https://111qqz.com/2019/02/variadic-function-of-c/<p>说起C语言的变长参数，可能听起来比较陌生，因为很少会需要自己实现。不过想一下scanf和printf，参数个数的确是不固定的。</p>https://111qqz.com/2016/01/cstatic/Mon, 11 Jan 2016 06:55:04 +0000https://111qqz.com/2016/01/cstatic/<p>一般有两个</p> <div class="highlight-wrapper"><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-cpp" data-lang="cpp"><span class="line"><span class="ln">1</span><span class="cl"><span class="k">static</span> <span class="kt">int</span> <span class="n">a</span><span class="p">;</span> </span></span><span class="line"><span class="ln">2</span><span class="cl"><span class="kt">int</span> <span class="n">b</span><span class="p">;</span> </span></span><span class="line"><span class="ln">3</span><span class="cl"><span class="kt">void</span> <span class="nf">func</span><span class="p">(</span><span class="kt">void</span><span class="p">)</span> </span></span><span class="line"><span class="ln">4</span><span class="cl"><span class="p">{</span> </span></span><span class="line"><span class="ln">5</span><span class="cl"> <span class="k">static</span> <span class="kt">int</span> <span class="n">c</span><span class="o">=</span><span class="mi">0</span><span class="p">;</span> </span></span><span class="line"><span class="ln">6</span><span class="cl"> <span class="kt">int</span> <span class="n">d</span><span class="p">;</span> </span></span><span class="line"><span class="ln">7</span><span class="cl"><span class="p">}</span></span></span></code></pre></div></div> <p><strong>在这里，a与b都是全局变量，二者的区别是，b可以被别的文件使用，a只能在本文件中使用，这是static对全局变量的作用。</strong> ** c和d的区别是，d是一个自动变量，func函数执行完后，d会自动被释放。但c却不会被释放，下一次调用func函数时，c的值会保留上次的值继续使用(而不是初始值0，初始化只会在函数第一次被调用的时候执行)**</p>