{"id":1427,"date":"2024-08-08T14:37:24","date_gmt":"2024-08-08T06:37:24","guid":{"rendered":"https:\/\/swordofmorning.com\/?p=1427"},"modified":"2025-10-09T13:54:44","modified_gmt":"2025-10-09T05:54:44","slug":"tricks-03","status":"publish","type":"post","link":"https:\/\/swordofmorning.com\/index.php\/2024\/08\/08\/tricks-03\/","title":{"rendered":"C\/C++ \u679a\u4e3e\u4e2d\u7684 if else"},"content":{"rendered":"<p>&emsp;&emsp;\u672c\u6587\u65e8\u5728\u89e3\u51b3C\/C++\u4e2d\u5904\u7406\u679a\u4e3e\u7684<code>if else<\/code>\u5d4c\u5957\u95ee\u9898\u3002\u5047\u8bbe\u6211\u4eec\u6709\u5982\u4e0b\u7684<code>enum<\/code>\u5b9a\u4e49\uff1a<\/p>\n<pre><code class=\"language-c\">enum {\n    PSEUDO_COLOR_IRON_BOW = 0,\n    PSEUDO_COLOR_WHITE_HOT,\n    PSEUDO_COLOR_BLACK_HOT,\n    PSEUDO_COLOR_RAINBOW,\n    PSEUDO_COLOR_RAINBOW_HC,\n    PSEUDO_COLOR_IRON_BOW_F8,\n    PSEUDO_COLOR_IRON_BOW_F10,\n    PSEUDO_COLOR_NUMS,\n};<\/code><\/pre>\n<p>\u5982\u679c\u6211\u4eec\u60f3\u8981\u5b9e\u73b0\u5982\u4e0b\u7684\u5224\u65ad\uff1a<\/p>\n<pre><code class=\"language-c\">\nif (param in PSEUDO_COLOR_NUMS)\n<\/code><\/pre>\n<p>\u90a3\u6211\u4eec\u4f7f\u7528\u7684\u65b9\u6cd5\u65e0\u6cd5\u662f\uff1a<code>if else<\/code>\u7684\u5d4c\u5957\u3001\u4e00\u4e2a<code>if<\/code>\u4e2d\u591a\u4e2a<code>or<\/code>\u3001<code>switch<\/code>\u548c<code>\u6620\u5c04<\/code>\u3002\u4f46\u5bf9\u4e8e\u8fd9\u79cd<strong>\u8fde\u7eed\u7684<\/strong>enum\u6765\u8bf4\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4f4d\u79fb\u6765\u8fdb\u884c\u4e00\u4e2a\u7b80\u5355\u7684\u5224\u65ad\u3002<\/p>\n<p>&emsp;&emsp;\u5047\u8bbe\u6211\u4eec\u6700\u5927\u679a\u4e3e\u5230\u4e86<code>6<\/code>\uff0c\u9700\u8981\u5224\u65ad\u7684\u6570\u662f<code>data<\/code>\u3002\u6211\u4eec\u53ef\u4ee5\u8bbe\u7f6e\u4e00\u4e2a<code>0b 0111 1111<\/code>\uff0c\u4f7f<code>1 &lt; data<\/code>\uff0c\u7136\u540e\u5c06\u5176\u8fdb\u884c\u4e0e\u64cd\u4f5c\uff0c\u4ee5\u5224\u65ad<code>1<\/code>\u662f\u5426\u88ab\u5de6\u79fb\u51fa\u533a\u95f4\u3002\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<pre><code class=\"language-cpp\">const uint8_t VALID_PSEUDO_COLORS = 0b01111111;\n\nif (VALID_PSEUDO_COLORS &amp; (1 &lt;&lt; data))\n{\n    \/\/ pseudo_color = data;\n}\nelse\n{\n    return error;\n}<\/code><\/pre>\n<p>&emsp;&emsp;\u8fdb\u4e00\u6b65\u7684\uff0c\u5982\u679c\u6211\u4eec<code>PSEUDO_COLOR_NUMS = 10<\/code>\uff0c\u90a3\u4e48\u6211\u4eec\u9700\u8981\u8ba9<code>VALID_PSEUDO_COLORS<\/code>\u7684\u4f4e<code>10+1<\/code>\u4f4d\u90fd\u4e3a1\uff0c\u9ad8\u4f4d\u90fd\u4e3a0\uff0c\u5373\u53ef\u6bd4\u8f83\u3002\u6211\u4eec\u8fdb\u4e00\u6b65\u5730\u53ef\u4ee5\u5c06\u7a0b\u5e8f\u5199\u4e3a\uff1a<\/p>\n<pre><code class=\"language-cpp\">const uint16_t VALID_PSEUDO_COLORS = (1 &lt;&lt; PSEUDO_COLOR_NUMS) - 1;<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>&emsp;&emsp;\u672c\u6587\u65e8\u5728\u89e3\u51b3C\/C++\u4e2d\u5904\u7406\u679a\u4e3e\u7684if else\u5d4c\u5957\u95ee\u9898\u3002\u5047\u8bbe\u6211\u4eec\u6709\u5982\u4e0b\u7684enum\u5b9a\u4e49\uff1a enum { P &#8230;<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[43],"tags":[],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/swordofmorning.com\/index.php\/wp-json\/wp\/v2\/posts\/1427"}],"collection":[{"href":"https:\/\/swordofmorning.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/swordofmorning.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/swordofmorning.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/swordofmorning.com\/index.php\/wp-json\/wp\/v2\/comments?post=1427"}],"version-history":[{"count":1,"href":"https:\/\/swordofmorning.com\/index.php\/wp-json\/wp\/v2\/posts\/1427\/revisions"}],"predecessor-version":[{"id":1428,"href":"https:\/\/swordofmorning.com\/index.php\/wp-json\/wp\/v2\/posts\/1427\/revisions\/1428"}],"wp:attachment":[{"href":"https:\/\/swordofmorning.com\/index.php\/wp-json\/wp\/v2\/media?parent=1427"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/swordofmorning.com\/index.php\/wp-json\/wp\/v2\/categories?post=1427"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/swordofmorning.com\/index.php\/wp-json\/wp\/v2\/tags?post=1427"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}