论坛站务软件水平考试华为认证计算机等级PMP认证思科认证Photoshop3DMAX编程语言移动开发系统运维产品运营淘宝营销办公软件Ps修图云计算大数据摄影就业

<h2 style="border: 0px; margin: 0px 0px 20px; padding: 0px; font-size: 24px; font-stretch: normal; line-height: 36px; font-family: &quot;Microsoft YaHei&quot;, &quot;Myriad Pro&quot;, Lato, &quot;Helvetica Neue&quot;, Helvetica, Arial, sans-serif; color: rgb(46, 46, 46); white-space: normal; background-color: rgb(255, 255, 255);">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Switch语句</h2><h3 style="border: 0px; margin: 0px 0px 20px; padding: 0px; font-size: 20px; font-stretch: normal; line-height: 30px; font-family: &quot;Microsoft YaHei&quot;, &quot;Myriad Pro&quot;, Lato, &quot;Helvetica Neue&quot;, Helvetica, Arial, sans-serif; color: rgb(46, 46, 46); white-space: normal; background-color: rgb(255, 255, 255);">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;①、每个分支都必须用大括号括起来</h3><p style="border: 0px; margin-top: 0px; margin-bottom: 20px; padding: 0px; font-size: 15px; color: rgb(46, 46, 46); font-family: &quot;Microsoft YaHei&quot;, 宋体, &quot;Myriad Pro&quot;, Lato, &quot;Helvetica Neue&quot;, Helvetica, Arial, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;推荐这样写：</p><p><img src="/Public/forum/ueditor/image/20171017/1508203337787059.png" title="1508203337787059.png" alt="image.png"/></p><h3 style="border: 0px; margin: 0px 0px 20px; padding: 0px; font-size: 20px; font-stretch: normal; line-height: 30px; font-family: &quot;Microsoft YaHei&quot;, &quot;Myriad Pro&quot;, Lato, &quot;Helvetica Neue&quot;, Helvetica, Arial, sans-serif; color: rgb(46, 46, 46); white-space: normal; background-color: rgb(255, 255, 255);">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;②、使用枚举类型时，不能有<code style="border: 0px; margin: 0px; padding: 0px; font-family: Monaco, Consolas, &quot;Andale Mono&quot;, &quot;DejaVu Sans Mono&quot;, monospace;">default</code>分支， 除了使用枚举类型以外，都必须有<code style="border: 0px; margin: 0px; padding: 0px; font-family: Monaco, Consolas, &quot;Andale Mono&quot;, &quot;DejaVu Sans Mono&quot;, monospace;">default</code>分支</h3><p><img src="/Public/forum/ueditor/image/20171017/1508203412103821.png" title="1508203412103821.png" alt="image.png"/></p><p><span style="color: rgb(46, 46, 46); font-family: &quot;Microsoft YaHei&quot;, 宋体, &quot;Myriad Pro&quot;, Lato, &quot;Helvetica Neue&quot;, Helvetica, Arial, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;在</span><code style="border: 0px; margin: 0px; padding: 0px; font-size: 15px; font-family: Monaco, Consolas, &quot;Andale Mono&quot;, &quot;DejaVu Sans Mono&quot;, monospace; color: rgb(46, 46, 46); white-space: normal; background-color: rgb(255, 255, 255);">Switch</code><span style="color: rgb(46, 46, 46); font-family: &quot;Microsoft YaHei&quot;, 宋体, &quot;Myriad Pro&quot;, Lato, &quot;Helvetica Neue&quot;, Helvetica, Arial, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);">语句使用枚举类型的时候，如果使用了</span><code style="border: 0px; margin: 0px; padding: 0px; font-size: 15px; font-family: Monaco, Consolas, &quot;Andale Mono&quot;, &quot;DejaVu Sans Mono&quot;, monospace; color: rgb(46, 46, 46); white-space: normal; background-color: rgb(255, 255, 255);">default</code><span style="color: rgb(46, 46, 46); font-family: &quot;Microsoft YaHei&quot;, 宋体, &quot;Myriad Pro&quot;, Lato, &quot;Helvetica Neue&quot;, Helvetica, Arial, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);">分支，在将来就无法通过编译器来检查新增的枚举类型了。</span><br/></p>

论坛站务软件水平考试华为认证计算机等级PMP认证思科认证Photoshop3DMAX编程语言移动开发系统运维产品运营淘宝营销办公软件Ps修图云计算大数据摄影就业