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class="post-meta-separator"></span><span class="post-meta-position" title="作者IP属地为北京"><i class="anzhiyufont anzhiyu-icon-location-dot"></i>北京</span></div></div></div><section class="main-hero-waves-area waves-area"><svg class="waves-svg" xmlns="http://www.w3.org/2000/svg" xlink="http://www.w3.org/1999/xlink" viewBox="0 24 150 28" preserveAspectRatio="none" shape-rendering="auto"><defs><path id="gentle-wave" d="M -160 44 c 30 0 58 -18 88 -18 s 58 18 88 18 s 58 -18 88 -18 s 58 18 88 18 v 44 h -352 Z"></path></defs><g class="parallax"><use href="#gentle-wave" x="48" y="0"></use><use href="#gentle-wave" x="48" y="3"></use><use href="#gentle-wave" x="48" y="5"></use><use href="#gentle-wave" x="48" y="7"></use></g></svg></section><div id="post-top-cover"><img class="nolazyload" id="post-top-bg" src="https://cdn.statically.io/gh/AnZhiJJ/Blog_Img@main/博客站点配图/image.3qlx7labk120.png"></div></header><main class="layout" id="content-inner"><div id="post"><article class="post-content" id="article-container"><h2 id="指针基础">指针基础</h2>
<p>指针的主题，我们在初级阶段的《指针》章节已经接触过了，我们知道了指针的概念：</p>
<blockquote>
<p>1.指针就是变量，是用来存地址的，地址是唯一标识一块内存空间<br>
2.指针的大小是固定的4/8个字节（由平台决定，32位/64位）<br>
3.指针是有类型的，通常类型有char、int 、short、long、float、double<br>
4.指针类型决定了指针±整数的步长，指针解引用操作的时候的能够访问空间的大小<br>
5.指针的运算。</p>
<ul class="lvl-1">
<li class="lvl-2"><strong>指针±整数(==>指针指向的是该地址的上一个或下一个地址）</strong></li>
<li class="lvl-2"><strong>指针-指针（指向同一内存空间,可得指针之间的元素个数）</strong></li>
<li class="lvl-2"><strong>指针的关系运算（比较地址大小）</strong></li>
</ul>
</blockquote>
<h2 id="字符指针">字符指针</h2>
<p>指针类型中存在一种字符指针<code>char*</code></p>
<p><b>一般使用：</b></p>
<figure class="highlight c"><table><tr><td class="code"><pre><span class="line"><span class="type">int</span> <span class="title function_">main</span><span class="params">()</span></span><br><span class="line">{</span><br><span class="line"> <span class="type">char</span> ch= <span class="string">'w'</span>;</span><br><span class="line"> <span class="type">char</span> *pc = &ch;</span><br><span class="line"> *pc =<span class="string">'w'</span>;</span><br><span class="line"> <span class="keyword">return</span> <span class="number">0</span>;</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<p><b>另一种使用方式：</b></p>
<figure class="highlight c"><table><tr><td class="code"><pre><span class="line"><span class="type">int</span> <span class="title function_">main</span><span class="params">()</span></span><br><span class="line">{</span><br><span class="line"> <span class="type">const</span> <span class="type">char</span>* pstr = <span class="string">"hello bit."</span>;<span class="comment">//这里是把一个字符串放到pstr指针变量里了吗？</span></span><br><span class="line"> <span class="built_in">printf</span>(<span class="string">"%s\n"</span>, pstr);</span><br><span class="line"> <span class="keyword">return</span> <span class="number">0</span>;</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<p><em><strong>注：</strong></em></p>
<blockquote>
<p><strong><font color=black>(一）常量指针int const* p 和 const int* p</font></strong></p>
<p><b><font color=red>const 放在指针变量的 * 左边时，表示该指针所指向的数据（地址内的内容）是常量，即不能通过该指针修改所指向的数据。但p所指向的地址可以变。</font></b></p>
<figure class="highlight c"><table><tr><td class="code"><pre><span class="line">><span class="type">int</span> num = <span class="number">10</span>;</span><br><span class="line">><span class="type">const</span> <span class="type">int</span> *p = &num; <span class="comment">// 将const放在*的左边，表示所指向的数据是常量</span></span><br><span class="line">>*p = <span class="number">20</span>; <span class="comment">// 编译错误，因为p所指向的数据是常量</span></span><br><span class="line">>p++; <span class="comment">// 合法，p本身不是常量</span></span><br></pre></td></tr></table></figure>
<p>在上面的例子中，p 是一个指向 num的常量指针，即不能通过 p修改 num的值。但是可以通过 p 修改其指向的地址。</p>
<p>注**：int const* p定义了一个指向 const int类型数据的指针变量 p，也就是说，p 所指向的数据是一个常量，不能通过 p修改其所指向的数据**。但是 p本身不是常量，可以指向其他的 const int类型数据。</p>
<p><strong><font color=black>(二）指针常量int* const p</font></strong></p>
<p><b><font color=red>const放在指针变量的*右边时，表示指针本身是常量。它指向的地址是不可改变的，但地址里的内容可以通过指针改变。</font></b></p>
<figure class="highlight c"><table><tr><td class="code"><pre><span class="line">><span class="type">int</span> num = <span class="number">10</span>;</span><br><span class="line">><span class="type">int</span> *<span class="type">const</span> p = &num; <span class="comment">// 将const放在*的左边，并且指针本身也是常量</span></span><br><span class="line">>*p = <span class="number">20</span>; <span class="comment">// 合法，可以通过p来修改所指向的数据</span></span><br><span class="line">>p++; <span class="comment">// 编译错误，因为p本身是常量，不能修改其指向的地址</span></span><br></pre></td></tr></table></figure>
<p>在上面的例子中，int* const p就是一个指针常量，表示定义了一个指向 int 类型的指针变量 p，且这个指针变量是一个常量，其值(地址）不能被改变，但它所指向的 int类型数据（地址内的内容）可以被修改。</p>
<p><b><font color=black>总结:</font></b></p>
<p>一般是根据靠近原则来看，<strong>const修饰p那么就是指针本身值（即指向的地址）不变，const修饰*p那么就是指指针指向的变量值（指向的值）不变</strong></p>
<p><strong><font color=red>加深记忆记住三句话：</font></strong></p>
<ul class="lvl-1">
<li class="lvl-2">
<p>指针和 const 谁在前先读谁 ；</p>
</li>
<li class="lvl-2">
<p>*象征着地址，const象征着内容；</p>
</li>
<li class="lvl-2">
<p>谁在前面<strong>谁就不允许改变。</strong></p>
</li>
</ul>
</blockquote>
<figure class="highlight c"><table><tr><td class="code"><pre><span class="line"><span class="type">int</span> <span class="title function_">main</span><span class="params">()</span></span><br><span class="line">{</span><br><span class="line"> <span class="type">char</span> arr1[] = <span class="string">"abcdefk"</span>;</span><br><span class="line"> <span class="type">char</span> arr2[] = <span class="string">"abcdefk"</span>;</span><br><span class="line"> <span class="type">const</span> <span class="type">char</span>* p1 = <span class="string">"abcdefk"</span>;<span class="comment">//const使变量</span></span><br><span class="line"> <span class="type">const</span> <span class="type">char</span>* p2 = <span class="string">"abcdefk"</span>;<span class="comment">//常量字符串的地址会在内存中单独开辟一个空间，地址固定，</span></span><br><span class="line"> <span class="keyword">if</span> (p1 == p2)</span><br><span class="line"> {</span><br><span class="line"> <span class="built_in">printf</span>(<span class="string">"hehe\n"</span>);</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">else</span></span><br><span class="line"> {</span><br><span class="line"> <span class="built_in">printf</span>(<span class="string">"haha\n "</span>)</span><br><span class="line"> }</span><br><span class="line"> <span class="comment">//if (arr1 = arr2)</span></span><br><span class="line"> <span class="comment">//{</span></span><br><span class="line"> <span class="comment">// printf("hehe\n");</span></span><br><span class="line"> <span class="comment">//}</span></span><br><span class="line"> <span class="comment">//else</span></span><br><span class="line"> <span class="comment">//{</span></span><br><span class="line"> <span class="comment">// printf("haha\n");</span></span><br><span class="line"> <span class="comment">//}</span></span><br><span class="line"> <span class="keyword">return</span> <span class="number">0</span>;</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<p>这里p1和p2指向的是一个<b><font color=red>同一个常量字符串</font></b>。C/C++会把常量字符串存储到单独的一个内存区域，当几个指针。<strong>指向同一个字符串的时候，他们实际会指向同一块内存。但是用相同的常量字符串去初始化</strong><br>
<strong>不同的数组的时候就会开辟出不同的内存块</strong>。所以arr11和arr2不同，p1和p2不同。 <strong>来源《剑指offer》</strong></p>
<h2 id="指针数组">指针数组</h2>
<blockquote>
<p><strong>预备知识：</strong></p>
<ul class="lvl-1">
<li class="lvl-2">
<p>1.&arr-数组名-此时数组名不是首元素的地址–数组名表示整个数组–&数组名 取出的是整个数组的地址。</p>
</li>
<li class="lvl-2">
<p>2.sizeof(arr)-sizeof(数组名）-数组名表示整个数组-sizeof(数组名）计算的是整个数组的大小。</p>
</li>
<li class="lvl-2">
<p>除1、2以外，<strong><font color=blue>数组名表示数组的首元素的地址</font></strong></p>
</li>
</ul>
<figure class="highlight c"><table><tr><td class="code"><pre><span class="line">><span class="type">int</span>* arr1[<span class="number">10</span>]; <span class="comment">//整形指针的数组</span></span><br><span class="line"><span class="type">char</span> *arr2[<span class="number">4</span>]; <span class="comment">//一级字符指针的数组</span></span><br><span class="line"><span class="type">char</span> **arr3[<span class="number">5</span>];<span class="comment">//二级字符指针的数组```</span></span><br><span class="line"></span><br><span class="line">```c</span><br><span class="line"><span class="type">int</span> <span class="title function_">main</span><span class="params">()</span></span><br><span class="line">{</span><br><span class="line"><span class="type">int</span> arr1[] = { <span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>,<span class="number">5</span> };</span><br><span class="line"><span class="type">int</span> arr2[] = { <span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>,<span class="number">5</span>,<span class="number">6</span> };</span><br><span class="line"><span class="type">int</span> arr3[] = { <span class="number">3</span>,<span class="number">4</span>,<span class="number">5</span>,<span class="number">6</span>,<span class="number">7</span> };</span><br><span class="line"><span class="type">int</span>* parr[] = { arr1,arr2,arr3 };</span><br><span class="line"><span class="keyword">return</span> <span class="number">0</span>;</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
</blockquote>
<p><img src= "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" data-lazy-src="https://cdn.statically.io/gh/AnZhiJJ/Blog_Img@C/%E7%AC%AC%E4%B9%9D%E8%8A%82%20%E6%8C%87%E9%92%88%E7%9A%84%E8%BF%9B%E9%98%B6/image-20230422002000521.png" alt="image-20230422002000521"></p>
<p><strong>指针数组用法：</strong></p>
<figure class="highlight c"><table><tr><td class="code"><pre><span class="line"><span class="type">int</span> <span class="title function_">main</span><span class="params">()</span></span><br><span class="line">{</span><br><span class="line"> <span class="type">int</span> arr1[] = { <span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>,<span class="number">5</span> };</span><br><span class="line"> <span class="type">int</span> arr2[] = { <span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>,<span class="number">5</span>,<span class="number">6</span> };</span><br><span class="line"> <span class="type">int</span> arr3[] = { <span class="number">3</span>,<span class="number">4</span>,<span class="number">5</span>,<span class="number">6</span>,<span class="number">7</span> };</span><br><span class="line"></span><br><span class="line"> <span class="type">int</span>* parr[] = { arr1,arr2,arr3 };</span><br><span class="line"> <span class="type">int</span> i = <span class="number">0</span>;</span><br><span class="line"> <span class="keyword">for</span> (i = <span class="number">0</span>;i < <span class="number">3</span>;i++)</span><br><span class="line"> {</span><br><span class="line"> <span class="type">int</span> j = <span class="number">0</span>;</span><br><span class="line"> <span class="keyword">for</span> (j = <span class="number">0</span>;j < <span class="number">5</span>;j++)</span><br><span class="line"> {</span><br><span class="line"> <span class="built_in">printf</span>(<span class="string">"%d "</span>, *(parr[i] + j));</span><br><span class="line"> }</span><br><span class="line"> <span class="built_in">printf</span>(<span class="string">"\n"</span>);</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">return</span> <span class="number">0</span>;</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<h2 id="数组指针">数组指针</h2>
<h3 id="数组指针的定义">数组指针的定义</h3>
<p><strong>数组指针是指针</strong></p>
<blockquote>
<p>整形指针：int * pint; 能够指向整形数据的指针。浮点型指针：float * pf; 能够指向浮点型数据的指针。数组指针：能够指向数组的指针</p>
</blockquote>
<figure class="highlight c"><table><tr><td class="code"><pre><span class="line"><span class="type">int</span> *p1[<span class="number">10</span>];<span class="comment">//==int* p1[10] 指针数组</span></span><br><span class="line"><span class="type">int</span> (*p2)[<span class="number">10</span>];<span class="comment">//数组指针</span></span><br><span class="line"><span class="comment">//p1, p2分别是什么？</span></span><br></pre></td></tr></table></figure>
<p><strong>指针数组</strong>，对于语句“int* p1[10]”，因为“[]”的优先级要比“*”要高，所以 p1 先与“[]”结合，构成一个数组的定义，数组名为 p1，而“int*”修饰的是数组的内容，即数组的每个元素。也就是说，<strong>该数组包含 10个指向 int 类型数据的指针，<strong>如图 1 所示，因此，它是</strong>一个指针数组</strong>。</p>
<p><img src= "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" data-lazy-src="https://cdn.statically.io/gh/AnZhiJJ/Blog_Img@C/%E7%AC%AC%E4%B9%9D%E8%8A%82%20%E6%8C%87%E9%92%88%E7%9A%84%E8%BF%9B%E9%98%B6/22201218-19ddd896ae6a45e1b61c7e3ee59b4662.jpg" alt="Attachment"></p>
<p> 图 1</p>
<p><strong>数组指针</strong>，对于语句“int(*p2)[5]”，“()”的优先级比“[]”高，“*<strong>”号和 p2 构成一个指针的定义</strong>，<strong>指针变量名为 p2</strong>，**而 int 修饰的是数组的内容，即数组的每个元素。**也就是说，<strong>p2 是一个指针，它指向一个包含 10 个 int 类型数据的数组</strong>，如图 2 所示。很显然，它是一个数组指针，<strong>数组在这里并没有名字，是个匿名数组</strong>。</p>
<p><img src= "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" data-lazy-src="https://cdn.statically.io/gh/AnZhiJJ/Blog_Img@C/%E7%AC%AC%E4%B9%9D%E8%8A%82%20%E6%8C%87%E9%92%88%E7%9A%84%E8%BF%9B%E9%98%B6/22201218-19ddd896ae6a45e1b61c7e3ee59b4662(1).jpg" alt="Attachment"></p>
<p> 图 2</p>
<p>由此可见，</p>
<blockquote>
<p>对指针数组来说，首先它是一个数组，数组的元素都是指针，也就是说该数组存储的是指针，数组占多少个字节由数组本身决定；而对数组指针来说，<strong>首先它是一个指针</strong>，**它指向一个数组，**也就是说它是指向数组的指针，>在 32 位系统下永远占 4 字节，至于它指向的数组占多少字节，这个不能够确定，要看具体情况。</p>
</blockquote>
<figure class="highlight c"><table><tr><td class="code"><pre><span class="line"><span class="type">int</span> <span class="title function_">main</span><span class="params">()</span></span><br><span class="line">{</span><br><span class="line"> <span class="comment">//int* p = NULL;//p是整形指针 - 指向整形的指针 - 可以存放整形的地址</span></span><br><span class="line"> <span class="comment">//char* pc = NULL;//pa是字符指针 - 指向字符的指针 - 可以存放字符的地址</span></span><br><span class="line"> <span class="comment">//数组指针 - 指向数组的指针 -可以存放数组的地址</span></span><br><span class="line"> <span class="comment">//int arr[10] = { 0 };</span></span><br><span class="line"> <span class="comment">//arr-首元素地址</span></span><br><span class="line"> <span class="comment">//&arr[0]-首元素的地址</span></span><br><span class="line"> <span class="comment">//&arr-数组的地址(整个数组）</span></span><br><span class="line"></span><br><span class="line"> <span class="type">int</span> arr[<span class="number">10</span>] = { <span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>,<span class="number">5</span>,<span class="number">6</span>,<span class="number">7</span>,<span class="number">8</span>,<span class="number">9</span>,<span class="number">10</span> };</span><br><span class="line"> <span class="type">int</span> (*p)[<span class="number">10</span>] = &arr;<span class="comment">//数组的地址要存起来</span></span><br><span class="line"> <span class="comment">//上面的p就是数组指针</span></span><br><span class="line"> <span class="keyword">return</span> <span class="number">0</span>;</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<p><strong>例：</strong></p>
<figure class="highlight c"><table><tr><td class="code"><pre><span class="line"><span class="type">int</span> <span class="title function_">main</span><span class="params">()</span></span><br><span class="line">{</span><br><span class="line"> <span class="type">char</span>* arr[<span class="number">5</span>];<span class="comment">//指针数组</span></span><br><span class="line"> <span class="type">char</span>* (*pa)[<span class="number">5</span>]=&arr;</span><br><span class="line"> <span class="comment">//*pa指针指向数组5个元素，即(*pa)[5]；而指向的数组元素类型是char*。</span></span><br><span class="line"> <span class="comment">//故取数组的地址&arr写成：char* (*pa)[5]=&arr； </span></span><br><span class="line"></span><br><span class="line"> <span class="keyword">return</span> <span class="number">0</span>;</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<img src= "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" data-lazy-src="https://cdn.statically.io/gh/AnZhiJJ/Blog_Img@C/%E7%AC%AC%E4%B9%9D%E8%8A%82%20%E6%8C%87%E9%92%88%E7%9A%84%E8%BF%9B%E9%98%B6/image-20230422185558143.png" alt="image-20230422185558143" style="zoom:50%;" />
<h3 id="数组名VS数组名">&数组名VS数组名</h3>
<p><strong><font color=red>&arr是取的整个数组的地址</font></strong></p>
<h3 id="数组指针用法">数组指针用法</h3>
<h4 id="用法1：">用法1：</h4>
<figure class="highlight c"><table><tr><td class="code"><pre><span class="line"><span class="type">int</span>(*pa)[<span class="number">10</span>] = &arr;</span><br><span class="line"><span class="type">int</span> i = <span class="number">0</span>;</span><br><span class="line"><span class="keyword">for</span> (i = <span class="number">0</span>;i < <span class="number">10</span>;i++)</span><br><span class="line">{</span><br><span class="line"> <span class="built_in">printf</span>(<span class="string">"%d "</span>, *(*pa+i));<span class="comment">//*pa==arr</span></span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<h4 id="用法2-地址传参">用法2:地址传参</h4>
<p><strong>二维数组看作一维数组，则其数组名就是首元素的地址</strong></p>
<figure class="highlight c"><table><tr><td class="code"><pre><span class="line">arr[i] == *(a+i) == *(p+i) == p[i]</span><br><span class="line"> </span><br><span class="line">*(*(p + i) + j)== *(p[i] + j)==(*(p + i))[j]==p[i][j]</span><br></pre></td></tr></table></figure>
<p><strong>例：</strong></p>
<figure class="highlight c"><table><tr><td class="code"><pre><span class="line">(*(p + i) + j);<span class="comment">//(p + i)找到n维数组第i行的地址，(*(p + i) + j)找到n维数组第i行的第j列元素的地址</span></span><br></pre></td></tr></table></figure>
<figure class="highlight c"><table><tr><td class="code"><pre><span class="line"><span class="comment">// 参数是数组的形式</span></span><br><span class="line"><span class="comment">//void print1(int arr[3][5], int x, int y)</span></span><br><span class="line"><span class="comment">//{</span></span><br><span class="line"><span class="comment">// //int i = 0, j = 0;</span></span><br><span class="line"><span class="comment">// //for (i = 0;i < x;i++)</span></span><br><span class="line"><span class="comment">// //{</span></span><br><span class="line"><span class="comment">// // for (j = 0;j < y;j++)</span></span><br><span class="line"><span class="comment">// // {</span></span><br><span class="line"><span class="comment">// // printf("%d ", arr[i][j]);</span></span><br><span class="line"><span class="comment">// // }</span></span><br><span class="line"><span class="comment">// // printf("\n");</span></span><br><span class="line"><span class="comment">// //}</span></span><br><span class="line"><span class="comment">//</span></span><br><span class="line"><span class="comment">// return 0;</span></span><br><span class="line"><span class="comment">//}</span></span><br><span class="line"></span><br><span class="line"><span class="comment">//参数是指针的形式</span></span><br><span class="line"><span class="type">void</span> <span class="title function_">print2</span><span class="params">(<span class="type">int</span> (*p)[<span class="number">5</span>], <span class="type">int</span> x, <span class="type">int</span> y)</span><span class="comment">//int (*p)[5] - 数组指针p是指向含5个元素为int类型的数组</span></span><br><span class="line">{</span><br><span class="line"> <span class="type">int</span> i = <span class="number">0</span>;</span><br><span class="line"> <span class="keyword">for</span> (i = <span class="number">0</span>;i < x;i++)</span><br><span class="line"> {</span><br><span class="line"> <span class="type">int</span> j = <span class="number">0</span>;</span><br><span class="line"> <span class="keyword">for</span> (j = <span class="number">0</span>;j < y;j++)</span><br><span class="line"> {</span><br><span class="line"> <span class="built_in">printf</span>(<span class="string">"%d "</span>, p[i][j]);</span><br><span class="line"> <span class="comment">// printf("%d ", *(p[i] + j));</span></span><br><span class="line"> <span class="comment">//printf("%d ", * (*(p + i) + j));//(p + i)找到n维数组第i行的地址，(*(p + i) + j)找到n维数组第i行的第j列元素的地址</span></span><br><span class="line"> <span class="comment">//printf("%d ", (*(p + i))[j]);</span></span><br><span class="line"> <span class="built_in">printf</span>(<span class="string">"\n"</span>);</span><br><span class="line"> }</span><br><span class="line">}</span><br><span class="line"><span class="type">int</span> <span class="title function_">main</span><span class="params">()</span></span><br><span class="line">{</span><br><span class="line"> <span class="type">int</span> arr[<span class="number">3</span>][<span class="number">5</span>] = { {<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>,<span class="number">5</span>},{<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>,<span class="number">5</span>,<span class="number">6</span>},{<span class="number">3</span>,<span class="number">4</span>,<span class="number">5</span>,<span class="number">6</span>,<span class="number">7</span>} };</span><br><span class="line"> <span class="comment">//print1(arr, 3, 5);//arr - 数组名 -数组名就是首元素的地址</span></span><br><span class="line"> print2(arr, <span class="number">3</span>, <span class="number">5</span>);</span><br><span class="line"> <span class="comment">//数组名arr，表示首元素的地址</span></span><br><span class="line"> <span class="comment">//但是二维数组的首元素是二维数组的第一行</span></span><br><span class="line"> <span class="comment">//所以这里传递的arr，其实相当于第一行的地址，是一维数组的地址</span></span><br><span class="line"> <span class="comment">//可以数组指针来接收</span></span><br><span class="line"> </span><br><span class="line"> <span class="comment">//int arr[10]={1,2,3,4,5,6,7,8,9,10}</span></span><br><span class="line"> <span class="comment">//int i = 0;</span></span><br><span class="line"> <span class="comment">//int* p = arr;</span></span><br><span class="line"> <span class="comment">//for (i = 0;i < 10;i++)</span></span><br><span class="line"> <span class="comment">//{</span></span><br><span class="line"> <span class="comment">// //printf("%d ", *(p + i));</span></span><br><span class="line"> <span class="comment">// //printf("%d ",p[i]);</span></span><br><span class="line"> <span class="comment">// //printf("%d ", *(arr + i));</span></span><br><span class="line"> <span class="comment">// printf("%d ", arr[i]);//arr[i] == *(a+i) == *(p+i) == p[i]</span></span><br><span class="line"> <span class="comment">//}</span></span><br><span class="line"> <span class="keyword">return</span> <span class="number">0</span>;</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<p>练习：</p>
<figure class="highlight c"><table><tr><td class="code"><pre><span class="line"><span class="type">int</span> arr[<span class="number">5</span>];<span class="comment">//arr是一个含5个元素的整形数组</span></span><br><span class="line"><span class="type">int</span> *parr1[<span class="number">10</span>];<span class="comment">//parr1是一个数组，数组有10个元素，每个元素的类型是int*,故parr1是指针数组</span></span><br><span class="line"><span class="type">int</span> (*parr2)[<span class="number">10</span>];<span class="comment">//parr2是数组指针，它指向一个含10个元素的数组，数组的元素类型是int</span></span><br><span class="line"><span class="type">int</span> (*parr3[<span class="number">10</span>])[<span class="number">5</span>];<span class="comment">//parr3是数组，该数组的有10个元素，每个元素是一个数组指针；该数组指针指向的数组有5个元素，每个元素类型是int</span></span><br></pre></td></tr></table></figure>
<h3 id="数组参数、指针参数">数组参数、指针参数</h3>
<h4 id="一维数组传参">一维数组传参</h4>
<figure class="highlight c"><table><tr><td class="code"><pre><span class="line"><span class="meta">#<span class="keyword">include</span> <span class="string"><stdio.h></span></span></span><br><span class="line"><span class="type">void</span> <span class="title function_">test</span><span class="params">(<span class="type">int</span> arr[])</span><span class="comment">//ok</span></span><br><span class="line">{}</span><br><span class="line"><span class="type">void</span> <span class="title function_">test</span><span class="params">(<span class="type">int</span> arr[<span class="number">10</span>])</span><span class="comment">//ok</span></span><br><span class="line">{}</span><br><span class="line"><span class="type">void</span> <span class="title function_">test</span><span class="params">(<span class="type">int</span> *arr)</span><span class="comment">//ok</span></span><br><span class="line">{}</span><br><span class="line"><span class="type">void</span> <span class="title function_">test2</span><span class="params">(<span class="type">int</span> *arr[<span class="number">20</span>])</span><span class="comment">//ok</span></span><br><span class="line">{}</span><br><span class="line"><span class="type">void</span> <span class="title function_">test2</span><span class="params">(<span class="type">int</span> **arr)</span><span class="comment">//ok//一级指针的地址存放在二级指针里 int **arr</span></span><br><span class="line">{}</span><br><span class="line"><span class="type">int</span> <span class="title function_">main</span><span class="params">()</span></span><br><span class="line">{</span><br><span class="line"> <span class="type">int</span> arr[<span class="number">10</span>] = {<span class="number">0</span>};</span><br><span class="line"> <span class="type">int</span> *arr2[<span class="number">20</span>] = {<span class="number">0</span>};</span><br><span class="line"> test(arr);</span><br><span class="line"> test2(arr2);</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<h4 id="二维数组传参">二维数组传参</h4>
<p><strong>二维数组的数组名是首元素的地址，传参时，传入的是<font color=red>数组第一行地址</font></strong></p>
<figure class="highlight c"><table><tr><td class="code"><pre><span class="line"><span class="type">void</span> <span class="title function_">test</span><span class="params">(<span class="type">int</span> arr[<span class="number">3</span>][<span class="number">5</span>])</span></span><br><span class="line">{}</span><br><span class="line"><span class="type">void</span> <span class="title function_">test1</span><span class="params">(<span class="type">int</span> arr[][<span class="number">5</span>])</span><span class="comment">//数组传参，行可以省略，列不可以省略</span></span><br><span class="line">{}</span><br><span class="line"><span class="type">void</span> <span class="title function_">test2</span><span class="params">(<span class="type">int</span> arr[][])</span><span class="comment">//error</span></span><br><span class="line">{}</span><br><span class="line"><span class="type">void</span> <span class="title function_">test3</span><span class="params">(<span class="type">int</span> *arr)</span><span class="comment">//error,二维数组无法存放整形指针中去</span></span><br><span class="line">{}</span><br><span class="line"><span class="type">void</span> <span class="title function_">test4</span><span class="params">(<span class="type">int</span>** arr)</span><span class="comment">//error,数组名是第一行地址，而二级指针存放是一级变量（指针）的地址</span></span><br><span class="line">{}</span><br><span class="line"><span class="comment">//总结：二维数组传参，函数形参的设计只能省略第一个[]的数字。</span></span><br><span class="line"><span class="comment">//因为对一个二维数组，可以不知道有多少行，但是必须知道一行多少元素。</span></span><br><span class="line"><span class="comment">//这样才方便运算。</span></span><br><span class="line"><span class="type">void</span> <span class="title function_">test5</span><span class="params">(<span class="type">int</span>* arr[<span class="number">5</span>])</span><span class="comment">//ok？//error</span></span><br><span class="line">{}</span><br><span class="line"><span class="type">void</span> <span class="title function_">test6</span><span class="params">(<span class="type">int</span> (*arr)[<span class="number">5</span>])</span><span class="comment">//ok？//ok</span></span><br><span class="line">{}</span><br><span class="line"></span><br><span class="line"><span class="type">int</span> <span class="title function_">main</span><span class="params">()</span></span><br><span class="line">{</span><br><span class="line"> <span class="type">int</span> arr[<span class="number">3</span>][<span class="number">5</span>] = {<span class="number">0</span>};</span><br><span class="line"> test(arr);</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<h4 id="一级指针传参">一级指针传参</h4>
<figure class="highlight c"><table><tr><td class="code"><pre><span class="line"><span class="meta">#<span class="keyword">include</span> <span class="string"><stdio.h></span></span></span><br><span class="line"><span class="type">void</span> <span class="title function_">print</span><span class="params">(<span class="type">int</span> *p, <span class="type">int</span> sz)</span></span><br><span class="line">{</span><br><span class="line"> <span class="type">int</span> i = <span class="number">0</span>;</span><br><span class="line"> <span class="keyword">for</span>(i=<span class="number">0</span>; i<sz; i++)</span><br><span class="line"> {</span><br><span class="line"> <span class="built_in">printf</span>(<span class="string">"%d\n"</span>, *(p+i));</span><br><span class="line"> }</span><br><span class="line">}</span><br><span class="line"><span class="type">int</span> <span class="title function_">main</span><span class="params">()</span></span><br><span class="line">{</span><br><span class="line"> <span class="type">int</span> arr[<span class="number">10</span>] = {<span class="number">1</span>,<span class="number">2</span>,<span class="number">3</span>,<span class="number">4</span>,<span class="number">5</span>,<span class="number">6</span>,<span class="number">7</span>,<span class="number">8</span>,<span class="number">9</span>};</span><br><span class="line"> <span class="type">int</span> *p = arr;</span><br><span class="line"> <span class="type">int</span> sz = <span class="keyword">sizeof</span>(arr)/<span class="keyword">sizeof</span>(arr[<span class="number">0</span>]);</span><br><span class="line"> <span class="comment">//一级指针p，传给函数</span></span><br><span class="line"> print(p, sz);</span><br><span class="line"> <span class="keyword">return</span> <span class="number">0</span>;</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<p><strong>思考：</strong></p>
<blockquote>
<p>当一个函数的参数部分为一级指针的时候，函数能接收什么参数？</p>
<figure class="highlight c"><table><tr><td class="code"><pre><span class="line"><span class="number">1.</span><span class="type">void</span> <span class="title function_">test1</span><span class="params">(<span class="type">int</span> *p)</span></span><br><span class="line"> {}</span><br><span class="line"><span class="comment">//test1函数能接收什么参数？ test1(&a);或test1(p1);</span></span><br><span class="line"><span class="type">int</span> <span class="title function_">main</span><span class="params">()</span></span><br><span class="line">{ <span class="type">int</span> a=<span class="number">10</span>;</span><br><span class="line"> <span class="type">int</span>* p1=&a;</span><br><span class="line"> test1(&a);</span><br><span class="line"> test1(p1);</span><br><span class="line"> <span class="keyword">return</span> <span class="number">0</span>;</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line"><span class="number">2.</span> <span class="type">void</span> <span class="title function_">test2</span><span class="params">(<span class="type">char</span>* p)</span></span><br><span class="line"> {}</span><br><span class="line"><span class="comment">//test2函数能接收什么参数？ test2(&ch);或test2(str);</span></span><br><span class="line"><span class="type">int</span> <span class="title function_">main</span><span class="params">()</span></span><br><span class="line">{ <span class="type">char</span> ch=<span class="string">'w'</span>;</span><br><span class="line"> <span class="type">char</span>* str=&ch;</span><br><span class="line"> test2(&ch);</span><br><span class="line"> test2(str);</span><br><span class="line"> <span class="keyword">return</span> <span class="number">0</span>;</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
</blockquote>
<h4 id="二级指针传参">二级指针传参</h4>
<figure class="highlight c"><table><tr><td class="code"><pre><span class="line"><span class="meta">#<span class="keyword">include</span> <span class="string"><stdio.h></span></span></span><br><span class="line"><span class="type">void</span> <span class="title function_">test</span><span class="params">(<span class="type">int</span>** ptr)</span></span><br><span class="line">{</span><br><span class="line"> <span class="built_in">printf</span>(<span class="string">"num = %d\n"</span>, **ptr); </span><br><span class="line">}</span><br><span class="line"><span class="type">int</span> <span class="title function_">main</span><span class="params">()</span></span><br><span class="line">{</span><br><span class="line"> <span class="type">int</span> n = <span class="number">10</span>;</span><br><span class="line"> <span class="type">int</span> *p = &n;</span><br><span class="line"> <span class="type">int</span> **pp = &p;<span class="comment">//取一级指针p的地址</span></span><br><span class="line"> test(pp);</span><br><span class="line"> test(&p);</span><br><span class="line"> </span><br><span class="line"> <span class="type">int</span>* arr[<span class="number">10</span>];<span class="comment">//指针数组，数组里每个元素都是一级指针</span></span><br><span class="line"> test(arr);<span class="comment">//传过去的是arr数组首元素的地址</span></span><br><span class="line"> <span class="keyword">return</span> <span class="number">0</span>;</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<p>思考：</p>
<blockquote>
<p>当函数的参数为二级指针的时候，可以接收什么参数？</p>
<figure class="highlight c"><table><tr><td class="code"><pre><span class="line">><span class="type">void</span> <span class="title function_">test</span><span class="params">(<span class="type">char</span> **p)</span></span><br><span class="line">>{</span><br><span class="line"> </span><br><span class="line">>}</span><br><span class="line">><span class="type">int</span> <span class="title function_">main</span><span class="params">()</span></span><br><span class="line">>{</span><br><span class="line"> <span class="type">char</span> c = <span class="string">'b'</span>;</span><br><span class="line"> <span class="type">char</span>*pc = &c;</span><br><span class="line"> <span class="type">char</span>**ppc = &pc;</span><br><span class="line"> <span class="type">char</span>* arr[<span class="number">10</span>];<span class="comment">//指针数组，数组里每个元素都是一级指针</span></span><br><span class="line"> test(&pc);</span><br><span class="line"> test(ppc);</span><br><span class="line"> test(arr);<span class="comment">//Ok?//ok//传过去的是arr数组首元素的地址</span></span><br><span class="line"> <span class="keyword">return</span> <span class="number">0</span>;</span><br><span class="line">>}</span><br></pre></td></tr></table></figure>
</blockquote>
<h2 id="函数指针">函数指针</h2>
<p><strong>&函数名 和 函数名 都是函数的地址</strong></p>
<p>函数指针定义示例：</p>
<pre><code>int Add(int x, int y)
{}
int (*pa)(int ,int ) = Add;
printf("%d\n", (*pa)(2, 3));
</code></pre>
<figure class="highlight c"><table><tr><td class="code"><pre><span class="line"><span class="comment">//函数指针 - 是指向函数的指针 -存放函数地址的指针</span></span><br><span class="line"><span class="type">int</span> <span class="title function_">Add</span><span class="params">(<span class="type">int</span> x, <span class="type">int</span> y)</span></span><br><span class="line">{</span><br><span class="line"> <span class="type">int</span> z = <span class="number">0</span>;</span><br><span class="line"> <span class="keyword">return</span> z = x + y;</span><br><span class="line">}</span><br><span class="line"><span class="type">int</span> <span class="title function_">main</span><span class="params">()</span></span><br><span class="line">{</span><br><span class="line"> <span class="type">int</span> a = <span class="number">10</span>;</span><br><span class="line"> <span class="type">int</span> b = <span class="number">20</span>;</span><br><span class="line"> <span class="comment">/*printf("%d ", Add(a, b));*/</span></span><br><span class="line"> <span class="comment">//&函数名 和 函数名 都是函数的地址</span></span><br><span class="line"> <span class="comment">//printf("%p\n", &Add);//打印出函数的地址</span></span><br><span class="line"> <span class="comment">//printf("%p\n", Add);//打印出函数的地址</span></span><br><span class="line"></span><br><span class="line"> <span class="type">int</span> (*pa)(<span class="type">int</span> ,<span class="type">int</span> ) = Add;</span><br><span class="line"> <span class="built_in">printf</span>(<span class="string">"%d\n"</span>, (*pa)(<span class="number">2</span>, <span class="number">3</span>));<span class="comment">//5</span></span><br><span class="line"> <span class="keyword">return</span> <span class="number">0</span>;</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<p><strong>用法：</strong></p>
<figure class="highlight c"><table><tr><td class="code"><pre><span class="line"><span class="type">void</span> <span class="title function_">Print</span><span class="params">(<span class="type">char</span>* str)</span></span><br><span class="line">{</span><br><span class="line"> <span class="built_in">printf</span>(<span class="string">"%s\n"</span>, str);</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line"><span class="type">int</span> <span class="title function_">main</span><span class="params">()</span></span><br><span class="line">{</span><br><span class="line"> <span class="type">void</span> (*p)(<span class="type">char</span>*) = Print;</span><br><span class="line"> (*p)(<span class="string">"hello bit"</span>);</span><br><span class="line"> <span class="keyword">return</span> <span class="number">0</span>;</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<p><strong>课件：</strong></p>
<figure class="highlight c"><table><tr><td class="code"><pre><span class="line"><span class="type">void</span> <span class="title function_">test</span><span class="params">()</span></span><br><span class="line">{</span><br><span class="line"> <span class="built_in">printf</span>(<span class="string">"hehe\n"</span>);</span><br><span class="line">}</span><br><span class="line"><span class="comment">//下面pfun1和pfun2哪个有能力存放test函数的地址？</span></span><br><span class="line"><span class="type">void</span> (*pfun1)();</span><br><span class="line"><span class="comment">//pfun1可以存放。pfun1先和*结合，说明pfun1是指针，指针指向的是一个函数，指向的函数无参数，返回值类型为void。</span></span><br><span class="line"><span class="type">void</span> *<span class="title function_">pfun2</span><span class="params">()</span>;</span><br><span class="line"><span class="comment">//pfun2表明这是一个函数，其返回类型是void*</span></span><br></pre></td></tr></table></figure>
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function getCommentReplies(item) {
if (item.replies) {
let replies = [item];
item.replies.forEach(item => {
replies.push(...getCommentReplies(item));
});
return replies;
} else {
return [];
}
}
function popCommentBarrage(data) {
let barrage = document.createElement("div");
barrage.className = "comment-barrage-item";
barrage.innerHTML = `
<div class="barrageHead">
<a class="barrageTitle ${
data.mailMd5 === "d338f432ad0bf2f61e5fe4ad1642725d" ? "barrageBloggerTitle" : ""
}" href="javascript:anzhiyu.scrollTo('#post-comment')"">
${data.mailMd5 === "d338f432ad0bf2f61e5fe4ad1642725d" ? "博主" : "热评"}
</a>
<div class="barrageNick">${data.nick}</div>
<img class="nolazyload barrageAvatar" src="https://cravatar.cn/avatar/${data.mailMd5}"/>
<a class="comment-barrage-close" href="javascript:anzhiyu.switchCommentBarrage()" rel="external nofollow noreferrer"><i class="anzhiyufont anzhiyu-icon-xmark"></i></a>
</div>
<a class="barrageContent" href="#${data.id}">
<object>${data.comment}</object>
</a>
`;
commentBarrageConfig.barrageTimer.push(barrage);
commentBarrageConfig.dom.append(barrage);
}
function removeCommentBarrage(barrage) {
barrage.className = "comment-barrage-item out";
setTimeout(() => {
if (commentBarrageConfig.dom && commentBarrageConfig.dom.contains(barrage)) {
commentBarrageConfig.dom.removeChild(barrage);
}
}, 1000);
}
// 自动隐藏
const commentEntryCallback = (entries) => {
const commentBarrage = document.querySelector(".comment-barrage");
const postComment = document.getElementById("post-comment");
entries.forEach(entry => {
if (postComment && commentBarrage && document.body.clientWidth > 768) {
commentBarrage.style.bottom = entry.isIntersecting ? "-200px" : "0";
}
});
};
// 创建IntersectionObserver实例
const observer = new IntersectionObserver(commentEntryCallback, {
root: null,
rootMargin: "0px",
threshold: 0
});
// 监视目标元素
const postCommentTarget = document.getElementById("post-comment");
if (postCommentTarget) {
observer.observe(postCommentTarget);
}
initCommentBarrage();
if (localStorage.getItem("commentBarrageSwitch") !== "false") {
document.querySelector(".comment-barrage").style.display = "flex";
document.querySelector(".menu-commentBarrage-text").textContent = "关闭热评";
} else {
document.querySelector(".comment-barrage").style.display = "none";
document.querySelector(".menu-commentBarrage-text").textContent = "显示热评";
}
document.addEventListener("pjax:send", function () {
clearInterval(commentInterval);
});
}</script><script data-pjax src="https://npm.elemecdn.com/[email protected]/catalog-bar/catalog-bar.js"></script><script async data-pjax src="https://npm.elemecdn.com/[email protected]/categoryBar/categoryBar.js"></script><script async data-pjax src="https://npm.elemecdn.com/[email protected]/waterfall/waterfall.js"></script><script src="https://lf3-cdn-tos.bytecdntp.com/cdn/expire-1-M/qrcodejs/1.0.0/qrcode.min.js"></script><script>// 初始化函数
let rm = {};
//禁止图片拖拽
let imgElements = document.getElementsByTagName("img");
for (let i = 0; i < imgElements.length; i++) {
imgElements[i].addEventListener("dragstart", function (event) {
event.preventDefault();
});
}
// 显示菜单
rm.showRightMenu = function (isTrue, x = 0, y = 0) {
console.info(x, y)
let rightMenu = document.getElementById("rightMenu");
rightMenu.style.top = x + "px";
rightMenu.style.left = y + "px";
if (isTrue) {
rightMenu.style.display = "block";
stopMaskScroll();
} else {
rightMenu.style.display = "none";
}
};
// 隐藏菜单
rm.hideRightMenu = function () {
rm.showRightMenu(false);
let rightMenuMask = document.querySelector("#rightmenu-mask");
rightMenuMask.style.display = "none";
};
// 尺寸
let rmWidth = document.getElementById("rightMenu").offsetWidth;
let rmHeight = document.getElementById("rightMenu").offsetHeight;
// 重新定义尺寸
rm.reloadrmSize = function () {
rightMenu.style.visibility = "hidden";
rightMenu.style.display = "block";
// 获取宽度和高度
rmWidth = document.getElementById("rightMenu").offsetWidth;
rmHeight = document.getElementById("rightMenu").offsetHeight;
rightMenu.style.visibility = "visible";
};
// 获取点击的href
let domhref = "";
let domImgSrc = "";
let globalEvent = null;
var oncontextmenuFunction = function (event) {
if (document.body.clientWidth > 768) {
let pageX = event.clientX + 10; //加10是为了防止显示时鼠标遮在菜单上
let pageY = event.clientY;
//其他额外菜单
const $rightMenuOther = document.querySelector(".rightMenuOther");
const $rightMenuPlugin = document.querySelector(".rightMenuPlugin");
const $rightMenuCopyText = document.querySelector("#menu-copytext");
const $rightMenuPasteText = document.querySelector("#menu-pastetext");
const $rightMenuCommentText = document.querySelector("#menu-commenttext");
const $rightMenuNewWindow = document.querySelector("#menu-newwindow");
const $rightMenuNewWindowImg = document.querySelector("#menu-newwindowimg");
const $rightMenuCopyLink = document.querySelector("#menu-copylink");
const $rightMenuCopyImg = document.querySelector("#menu-copyimg");
const $rightMenuDownloadImg = document.querySelector("#menu-downloadimg");
const $rightMenuSearch = document.querySelector("#menu-search");
const $rightMenuSearchBaidu = document.querySelector("#menu-searchBaidu");
const $rightMenuMusicToggle = document.querySelector("#menu-music-toggle");
const $rightMenuMusicBack = document.querySelector("#menu-music-back");
const $rightMenuMusicForward = document.querySelector("#menu-music-forward");
const $rightMenuMusicPlaylist = document.querySelector("#menu-music-playlist");
const $rightMenuMusicCopyMusicName = document.querySelector("#menu-music-copyMusicName");
let href = event.target.href;
let imgsrc = event.target.currentSrc;
// 判断模式 扩展模式为有事件
let pluginMode = false;
$rightMenuOther.style.display = "block";
globalEvent = event;
// 检查是否需要复制 是否有选中文本
if (selectTextNow && window.getSelection()) {
pluginMode = true;
$rightMenuCopyText.style.display = "block";
$rightMenuCommentText.style.display = "block";
$rightMenuSearch.style.display = "block";
$rightMenuSearchBaidu.style.display = "block";
} else {
$rightMenuCopyText.style.display = "none";
$rightMenuCommentText.style.display = "none";
$rightMenuSearchBaidu.style.display = "none";
$rightMenuSearch.style.display = "none";
}
//检查是否右键点击了链接a标签
if (href) {
pluginMode = true;
$rightMenuNewWindow.style.display = "block";
$rightMenuCopyLink.style.display = "block";
domhref = href;
} else {
$rightMenuNewWindow.style.display = "none";
$rightMenuCopyLink.style.display = "none";
}
//检查是否需要复制图片
if (imgsrc) {
pluginMode = true;
$rightMenuCopyImg.style.display = "block";
$rightMenuDownloadImg.style.display = "block";
$rightMenuNewWindowImg.style.display = "block";
document.getElementById("rightMenu").style.width="12rem"
domImgSrc = imgsrc;
} else {
$rightMenuCopyImg.style.display = "none";
$rightMenuDownloadImg.style.display = "none";
$rightMenuNewWindowImg.style.display = "none";
}
// 判断是否为输入框
if (event.target.tagName.toLowerCase() === "input" || event.target.tagName.toLowerCase() === "textarea") {
pluginMode = true;
$rightMenuPasteText.style.display = "block";
} else {
$rightMenuPasteText.style.display = "none";
}
const navMusicEl = document.querySelector("#nav-music");
//判断是否是音乐
if (navMusicEl && navMusicEl.contains(event.target)) {
pluginMode = true;
$rightMenuMusicToggle.style.display = "block";
$rightMenuMusicBack.style.display = "block";
$rightMenuMusicForward.style.display = "block";
$rightMenuMusicPlaylist.style.display = "block";
$rightMenuMusicCopyMusicName.style.display = "block";
} else {
$rightMenuMusicToggle.style.display = "none";
$rightMenuMusicBack.style.display = "none";
$rightMenuMusicForward.style.display = "none";
$rightMenuMusicPlaylist.style.display = "none";
$rightMenuMusicCopyMusicName.style.display = "none";
}
// 如果不是扩展模式则隐藏扩展模块
if (pluginMode) {
$rightMenuOther.style.display = "none";
$rightMenuPlugin.style.display = "block";
} else {
$rightMenuPlugin.style.display = "none";
}
rm.reloadrmSize();
// 鼠标默认显示在鼠标右下方，当鼠标靠右或靠下时，将菜单显示在鼠标左方\上方
if (pageX + rmWidth > window.innerWidth) {
pageX -= rmWidth + 10;
}
if (pageY + rmHeight > window.innerHeight) {
pageY -= pageY + rmHeight - window.innerHeight;
}
rm.showRightMenu(true, pageY, pageX);
document.getElementById("rightmenu-mask").style.display = "flex";
return false;
}
};
// 监听右键初始化
window.oncontextmenu = oncontextmenuFunction
// 下载图片状态
rm.downloadimging = false;
// 复制图片到剪贴板
rm.writeClipImg = function (imgsrc) {
console.log("按下复制");
rm.hideRightMenu();
anzhiyu.snackbarShow("正在下载中，请稍后", false, 10000);
if (rm.downloadimging == false) {
rm.downloadimging = true;
setTimeout(function () {
copyImage(imgsrc);
anzhiyu.snackbarShow("复制成功！图片已添加盲水印，请遵守版权协议");
rm.downloadimging = false;
}, "10000");
}
};
function imageToBlob(imageURL) {
const img = new Image();