{"id":44636,"date":"2024-10-06T17:04:13","date_gmt":"2024-10-06T09:04:13","guid":{"rendered":"https:\/\/server.hk\/cnblog\/44636\/"},"modified":"2024-10-06T17:04:13","modified_gmt":"2024-10-06T09:04:13","slug":"linux-%e5%91%bd%e4%bb%a4%ef%bc%9abc-%e4%bb%bb%e6%84%8f%e7%b2%be%e5%ba%a6%e8%a8%88%e7%ae%97%e5%99%a8%e8%aa%9e%e8%a8%80","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/44636\/","title":{"rendered":"Linux \u547d\u4ee4\uff1abc &#8211; \u4efb\u610f\u7cbe\u5ea6\u8a08\u7b97\u5668\u8a9e\u8a00"},"content":{"rendered":"<h1 id=\"linux-%e5%91%bd%e4%bb%a4%ef%bc%9abc-%e4%bb%bb%e6%84%8f%e7%b2%be%e5%ba%a6%e8%a8%88%e7%ae%97%e5%99%a8%e8%aa%9e%e8%a8%80-OyicfxETWO\">Linux \u547d\u4ee4\uff1abc &#8211; \u4efb\u610f\u7cbe\u5ea6\u8a08\u7b97\u5668\u8a9e\u8a00<\/h1>\n<p>\u5728 Linux \u74b0\u5883\u4e2d\uff0c\u8a08\u7b97\u5668\u7684\u9700\u6c42\u4e0d\u50c5\u9650\u65bc\u57fa\u672c\u7684\u7b97\u8853\u904b\u7b97\uff0c\u8a31\u591a\u4f7f\u7528\u8005\u9700\u8981\u9032\u884c\u66f4\u8907\u96dc\u7684\u8a08\u7b97\uff0c\u5c24\u5176\u662f\u5728\u79d1\u5b78\u8a08\u7b97\u548c\u5de5\u7a0b\u61c9\u7528\u4e2d\u3002\u9019\u6642\uff0c<code>bc<\/code>\uff08Basic Calculator\uff09\u9019\u500b\u547d\u4ee4\u884c\u5de5\u5177\u4fbf\u6210\u70ba\u4e86\u4e00\u500b\u975e\u5e38\u6709\u7528\u7684\u9078\u64c7\u3002\u5b83\u662f\u4e00\u7a2e\u4efb\u610f\u7cbe\u5ea6\u7684\u8a08\u7b97\u5668\u8a9e\u8a00\uff0c\u80fd\u5920\u8655\u7406\u6d6e\u9ede\u6578\u548c\u6574\u6578\u7684\u8a08\u7b97\uff0c\u4e26\u4e14\u652f\u6301\u8b8a\u91cf\u3001\u51fd\u6578\u548c\u63a7\u5236\u7d50\u69cb\u3002<\/p>\n<h2 id=\"bc-%e7%9a%84%e5%9f%ba%e6%9c%ac%e7%89%b9%e6%80%a7-OyicfxETWO\">bc \u7684\u57fa\u672c\u7279\u6027<\/h2>\n<ul>\n<li><strong>\u4efb\u610f\u7cbe\u5ea6\uff1a<\/strong>bc \u53ef\u4ee5\u9032\u884c\u4efb\u610f\u7cbe\u5ea6\u7684\u8a08\u7b97\uff0c\u9019\u610f\u5473\u8457\u7528\u6236\u53ef\u4ee5\u6839\u64da\u9700\u8981\u8a2d\u7f6e\u8a08\u7b97\u7684\u7cbe\u5ea6\u3002<\/li>\n<li><strong>\u652f\u6301\u6d6e\u9ede\u6578\uff1a<\/strong>bc \u80fd\u5920\u8655\u7406\u6d6e\u9ede\u6578\u904b\u7b97\uff0c\u9019\u5c0d\u65bc\u9700\u8981\u9ad8\u7cbe\u5ea6\u7684\u8a08\u7b97\u975e\u5e38\u91cd\u8981\u3002<\/li>\n<li><strong>\u5167\u5efa\u51fd\u6578\uff1a<\/strong>bc \u63d0\u4f9b\u4e86\u4e00\u4e9b\u5167\u5efa\u7684\u6578\u5b78\u51fd\u6578\uff0c\u5982\u5e73\u65b9\u6839\u3001\u5c0d\u6578\u7b49\uff0c\u65b9\u4fbf\u7528\u6236\u9032\u884c\u8907\u96dc\u7684\u8a08\u7b97\u3002<\/li>\n<li><strong>\u8173\u672c\u652f\u6301\uff1a<\/strong>bc \u53ef\u4ee5\u7528\u4f86\u7de8\u5beb\u8173\u672c\uff0c\u9019\u4f7f\u5f97\u5b83\u5728\u81ea\u52d5\u5316\u8a08\u7b97\u65b9\u9762\u975e\u5e38\u6709\u7528\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%ae%89%e8%a3%9d-bc-OyicfxETWO\">\u5b89\u88dd bc<\/h2>\n<p>\u5728\u5927\u591a\u6578 Linux \u767c\u884c\u7248\u4e2d\uff0c<code>bc<\/code> \u901a\u5e38\u662f\u9810\u88dd\u7684\u3002\u5982\u679c\u672a\u5b89\u88dd\uff0c\u53ef\u4ee5\u901a\u904e\u4ee5\u4e0b\u547d\u4ee4\u9032\u884c\u5b89\u88dd\uff1a<\/p>\n<pre><code>sudo apt-get install bc  # Ubuntu\/Debian \u7cfb\u7d71\nsudo yum install bc        # CentOS\/RHEL \u7cfb\u7d71\n<\/code><\/pre>\n<h2 id=\"%e4%bd%bf%e7%94%a8-bc-%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%96%b9%e6%b3%95-OyicfxETWO\">\u4f7f\u7528 bc \u7684\u57fa\u672c\u65b9\u6cd5<\/h2>\n<p>\u555f\u52d5 <code>bc<\/code> \u975e\u5e38\u7c21\u55ae\uff0c\u53ea\u9700\u5728\u7d42\u7aef\u4e2d\u8f38\u5165 <code>bc<\/code>\uff0c\u7136\u5f8c\u6309\u4e0b Enter \u9375\u3002\u9019\u5c07\u9032\u5165 bc \u7684\u4ea4\u4e92\u6a21\u5f0f\u3002\u5728\u9019\u88e1\uff0c\u4f60\u53ef\u4ee5\u76f4\u63a5\u8f38\u5165\u8a08\u7b97\u8868\u9054\u5f0f\u3002<\/p>\n<h3 id=\"%e5%9f%ba%e6%9c%ac%e9%81%8b%e7%ae%97-OyicfxETWO\">\u57fa\u672c\u904b\u7b97<\/h3>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u57fa\u672c\u7684\u904b\u7b97\u793a\u4f8b\uff1a<\/p>\n<pre><code>5 + 3\n10 - 2\n4 * 2\n8 \/ 4\n<\/code><\/pre>\n<p>\u9019\u4e9b\u904b\u7b97\u5c07\u8fd4\u56de\u76f8\u61c9\u7684\u7d50\u679c\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0cbc \u9ed8\u8a8d\u4f7f\u7528\u6574\u6578\u904b\u7b97\uff0c\u82e5\u8981\u9032\u884c\u6d6e\u9ede\u6578\u904b\u7b97\uff0c\u9700\u8a2d\u7f6e\u5c0f\u6578\u4f4d\u6578\u3002<\/p>\n<h3 id=\"%e8%a8%ad%e7%bd%ae%e5%b0%8f%e6%95%b8%e4%bd%8d%e6%95%b8-OyicfxETWO\">\u8a2d\u7f6e\u5c0f\u6578\u4f4d\u6578<\/h3>\n<p>\u53ef\u4ee5\u4f7f\u7528 <code>scale<\/code> \u8b8a\u91cf\u4f86\u8a2d\u7f6e\u5c0f\u6578\u4f4d\u6578\u3002\u4f8b\u5982\uff0c\u82e5\u8981\u8a2d\u7f6e\u5c0f\u6578\u4f4d\u6578\u70ba 2\uff0c\u53ef\u4ee5\u9019\u6a23\u505a\uff1a<\/p>\n<pre><code>scale=2\n5 \/ 3\n<\/code><\/pre>\n<p>\u9019\u5c07\u8fd4\u56de <code>1.66<\/code>\uff0c\u800c\u4e0d\u662f <code>1<\/code>\u3002<\/p>\n<h3 id=\"%e4%bd%bf%e7%94%a8%e8%ae%8a%e9%87%8f%e5%92%8c%e5%87%bd%e6%95%b8-OyicfxETWO\">\u4f7f\u7528\u8b8a\u91cf\u548c\u51fd\u6578<\/h3>\n<p>bc \u4e5f\u652f\u6301\u8b8a\u91cf\u548c\u51fd\u6578\u7684\u4f7f\u7528\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u793a\u4f8b\uff1a<\/p>\n<pre><code>x=5\ny=3\nz=x + y\nz\n<\/code><\/pre>\n<p>\u9019\u5c07\u8fd4\u56de <code>8<\/code>\u3002\u6b64\u5916\uff0c\u4f60\u9084\u53ef\u4ee5\u5b9a\u7fa9\u51fd\u6578\uff1a<\/p>\n<pre><code>define square(x) { x * x }\nsquare(4)\n<\/code><\/pre>\n<p>\u9019\u5c07\u8fd4\u56de <code>16<\/code>\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-OyicfxETWO\">\u7d50\u8ad6<\/h2>\n<p>bc \u662f\u4e00\u500b\u529f\u80fd\u5f37\u5927\u7684\u4efb\u610f\u7cbe\u5ea6\u8a08\u7b97\u5668\u8a9e\u8a00\uff0c\u9069\u5408\u9700\u8981\u9ad8\u7cbe\u5ea6\u8a08\u7b97\u7684\u7528\u6236\u3002\u7121\u8ad6\u662f\u9032\u884c\u7c21\u55ae\u7684\u7b97\u8853\u904b\u7b97\uff0c\u9084\u662f\u7de8\u5beb\u8907\u96dc\u7684\u8a08\u7b97\u8173\u672c\uff0cbc \u90fd\u80fd\u63d0\u4f9b\u9748\u6d3b\u7684\u89e3\u6c7a\u65b9\u6848\u3002\u5c0d\u65bc Linux \u4f7f\u7528\u8005\u4f86\u8aaa\uff0c\u638c\u63e1 bc \u7684\u4f7f\u7528\u5c07\u5927\u5927\u63d0\u9ad8\u8a08\u7b97\u6548\u7387\u3002<\/p>\n<p>\u5982\u679c\u4f60\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u7684\u7528\u6236\u3002\u7121\u8ad6\u662f\u9700\u8981\u9ad8\u6027\u80fd\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u9084\u662f\u7a69\u5b9a\u7684 <a href=\"https:\/\/server.hk\">\u4e91\u4f3a\u670d\u5668<\/a>\uff0c\u6211\u5011\u90fd\u80fd\u63d0\u4f9b\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22 Linux \u547d\u4ee4 bc\uff0c\u9019\u662f\u4e00\u7a2e\u4efb\u610f\u7cbe\u5ea6\u8a08\u7b97\u5668\u8a9e\u8a00\uff0c\u9069\u5408\u9032\u884c\u9ad8\u7cbe\u5ea6\u6578\u5b78\u8a08\u7b97\u548c\u8173\u672c\u7de8\u7a0b\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4924],"tags":[],"class_list":["post-44636","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/44636","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=44636"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/44636\/revisions"}],"predecessor-version":[{"id":44637,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/44636\/revisions\/44637"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=44636"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=44636"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=44636"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}