{"id":198461,"date":"2024-11-14T18:36:24","date_gmt":"2024-11-14T10:36:24","guid":{"rendered":"https:\/\/server.hk\/cnblog\/198461\/"},"modified":"2024-11-14T18:36:24","modified_gmt":"2024-11-14T10:36:24","slug":"%e3%80%8clinux%e4%bd%bf%e7%94%a8bc%e5%91%bd%e4%bb%a4%e9%a1%af%e7%a4%ba%e5%b0%8f%e6%95%b8%e9%bb%9e%e3%80%8d-linux-bc%e9%a1%af%e7%a4%ba%e5%b0%8f%e6%95%b8%e9%bb%9e","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/198461\/","title":{"rendered":"\u300cLinux\u4f7f\u7528bc\u547d\u4ee4\u986f\u793a\u5c0f\u6578\u9ede\u300d (linux bc\u986f\u793a\u5c0f\u6578\u9ede)"},"content":{"rendered":"<h1 id=\"linux%e4%bd%bf%e7%94%a8bc%e5%91%bd%e4%bb%a4%e9%a1%af%e7%a4%ba%e5%b0%8f%e6%95%b8%e9%bb%9e-tkhEGYGGtc\">Linux\u4f7f\u7528bc\u547d\u4ee4\u986f\u793a\u5c0f\u6578\u9ede<\/h1>\n<p>\u5728Linux\u7cfb\u7d71\u4e2d\uff0c\u8a08\u7b97\u548c\u6578\u64da\u8655\u7406\u662f\u65e5\u5e38\u5de5\u4f5c\u4e2d\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\u3002bc\uff08Basic Calculator\uff09\u662f\u4e00\u500b\u5f37\u5927\u7684\u8a08\u7b97\u5de5\u5177\uff0c\u80fd\u5920\u9032\u884c\u7cbe\u78ba\u7684\u6578\u5b78\u8a08\u7b97\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5c0f\u6578\u9ede\u6642\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528bc\u547d\u4ee4\u4f86\u986f\u793a\u5c0f\u6578\u9ede\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u6280\u5de7\u3002<\/p>\n<h2 id=\"bc%e5%91%bd%e4%bb%a4%e7%b0%a1%e4%bb%8b-tkhEGYGGtc\">bc\u547d\u4ee4\u7c21\u4ecb<\/h2>\n<p>bc\u662f\u4e00\u500b\u4efb\u52d9\u5c0e\u5411\u7684\u8a08\u7b97\u5668\uff0c\u652f\u6301\u4efb\u610f\u7cbe\u5ea6\u7684\u6578\u5b78\u904b\u7b97\u3002\u5b83\u7684\u8a9e\u6cd5\u985e\u4f3c\u65bcC\u8a9e\u8a00\uff0c\u4e26\u4e14\u53ef\u4ee5\u5728\u547d\u4ee4\u884c\u4e2d\u76f4\u63a5\u4f7f\u7528\u3002bc\u7684\u4e3b\u8981\u7279\u9ede\u662f\u80fd\u5920\u9032\u884c\u6d6e\u9ede\u6578\u8a08\u7b97\uff0c\u9019\u4f7f\u5f97\u5b83\u5728\u9700\u8981\u9ad8\u7cbe\u5ea6\u8a08\u7b97\u7684\u5834\u5408\u4e2d\u975e\u5e38\u6709\u7528\u3002<\/p>\n<h2 id=\"%e8%a8%ad%e7%bd%ae%e5%b0%8f%e6%95%b8%e9%bb%9e%e7%b2%be%e5%ba%a6-tkhEGYGGtc\">\u8a2d\u7f6e\u5c0f\u6578\u9ede\u7cbe\u5ea6<\/h2>\n<p>\u5728\u4f7f\u7528bc\u9032\u884c\u8a08\u7b97\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u8a2d\u7f6e\u5c0f\u6578\u9ede\u7684\u7cbe\u5ea6\u3002\u9019\u53ef\u4ee5\u901a\u904e\u5b9a\u7fa9scale\u8b8a\u91cf\u4f86\u5be6\u73fe\u3002scale\u8b8a\u91cf\u6c7a\u5b9a\u4e86\u8a08\u7b97\u7d50\u679c\u4e2d\u5c0f\u6578\u9ede\u5f8c\u7684\u4f4d\u6578\u3002<\/p>\n<pre><code>echo \"scale=2; 10 \/ 3\" | bc\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u5c07scale\u8a2d\u7f6e\u70ba2\uff0c\u9019\u610f\u5473\u8457\u8a08\u7b97\u7d50\u679c\u5c07\u986f\u793a\u5230\u5c0f\u6578\u9ede\u5f8c\u5169\u4f4d\u3002\u57f7\u884c\u4e0a\u8ff0\u547d\u4ee4\u5f8c\uff0c\u8f38\u51fa\u7d50\u679c\u70ba\uff1a<\/p>\n<pre><code>3.33\n<\/code><\/pre>\n<h2 id=\"%e4%bd%bf%e7%94%a8bc%e9%80%b2%e8%a1%8c%e5%90%84%e7%a8%ae%e8%a8%88%e7%ae%97-tkhEGYGGtc\">\u4f7f\u7528bc\u9032\u884c\u5404\u7a2e\u8a08\u7b97<\/h2>\n<p>bc\u4e0d\u50c5\u53ef\u4ee5\u9032\u884c\u57fa\u672c\u7684\u7b97\u8853\u904b\u7b97\uff0c\u9084\u652f\u6301\u66f4\u8907\u96dc\u7684\u6578\u5b78\u904b\u7b97\uff0c\u4f8b\u5982\u5e73\u65b9\u6839\u3001\u6307\u6578\u548c\u4e09\u89d2\u51fd\u6578\u7b49\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u8a08\u7b97\u793a\u4f8b\uff1a<\/p>\n<h3 id=\"%e5%9f%ba%e6%9c%ac%e7%ae%97%e8%a1%93%e9%81%8b%e7%ae%97-tkhEGYGGtc\">\u57fa\u672c\u7b97\u8853\u904b\u7b97<\/h3>\n<pre><code>echo \"scale=3; 5.5 + 2.3\" | bc\necho \"scale=3; 5.5 - 2.3\" | bc\necho \"scale=3; 5.5 * 2.3\" | bc\necho \"scale=3; 5.5 \/ 2.3\" | bc\n<\/code><\/pre>\n<p>\u9019\u4e9b\u547d\u4ee4\u5c07\u5206\u5225\u8f38\u51fa\uff1a<\/p>\n<pre><code>7.800\n3.200\n12.650\n2.391\n<\/code><\/pre>\n<h3 id=\"%e5%b9%b3%e6%96%b9%e6%a0%b9%e8%a8%88%e7%ae%97-tkhEGYGGtc\">\u5e73\u65b9\u6839\u8a08\u7b97<\/h3>\n<p>\u8981\u8a08\u7b97\u5e73\u65b9\u6839\uff0c\u53ef\u4ee5\u4f7f\u7528bc\u7684sqrt\u51fd\u6578\uff1a<\/p>\n<pre><code>echo \"scale=4; sqrt(16)\" | bc\n<\/code><\/pre>\n<p>\u9019\u5c07\u8f38\u51fa\uff1a<\/p>\n<pre><code>4.0000\n<\/code><\/pre>\n<h3 id=\"%e6%8c%87%e6%95%b8%e8%a8%88%e7%ae%97-tkhEGYGGtc\">\u6307\u6578\u8a08\u7b97<\/h3>\n<p>bc\u9084\u652f\u6301\u6307\u6578\u904b\u7b97\uff0c\u4f7f\u7528^\u7b26\u865f\u4f86\u8868\u793a\uff1a<\/p>\n<pre><code>echo \"scale=3; 2^3\" | bc\n<\/code><\/pre>\n<p>\u9019\u5c07\u8f38\u51fa\uff1a<\/p>\n<pre><code>8\n<\/code><\/pre>\n<h2 id=\"%e4%bd%bf%e7%94%a8bc%e9%80%b2%e8%a1%8c%e8%a4%87%e9%9b%9c%e8%a8%88%e7%ae%97-tkhEGYGGtc\">\u4f7f\u7528bc\u9032\u884c\u8907\u96dc\u8a08\u7b97<\/h2>\n<p>bc\u7684\u5f37\u5927\u4e4b\u8655\u5728\u65bc\u5b83\u80fd\u5920\u8655\u7406\u8907\u96dc\u7684\u8a08\u7b97\u3002\u4f8b\u5982\uff0c\u60a8\u53ef\u4ee5\u5c07\u591a\u500b\u904b\u7b97\u7d50\u5408\u5728\u4e00\u8d77\uff1a<\/p>\n<pre><code>echo \"scale=4; (5.5 + 2.3) * (3.1 - 1.1)\" | bc\n<\/code><\/pre>\n<p>\u9019\u5c07\u8f38\u51fa\uff1a<\/p>\n<pre><code>19.6800\n<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e8%ab%96-tkhEGYGGtc\">\u7d50\u8ad6<\/h2>\n<p>bc\u662f\u4e00\u500b\u529f\u80fd\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5728Linux\u74b0\u5883\u4e2d\u9032\u884c\u7cbe\u78ba\u7684\u6578\u5b78\u8a08\u7b97\u3002\u901a\u904e\u8a2d\u7f6escale\u8b8a\u91cf\uff0c\u60a8\u53ef\u4ee5\u8f15\u9b06\u63a7\u5236\u5c0f\u6578\u9ede\u7684\u986f\u793a\u4f4d\u6578\uff0c\u4e26\u9032\u884c\u5404\u7a2e\u8907\u96dc\u7684\u8a08\u7b97\u3002\u7121\u8ad6\u662f\u9032\u884c\u57fa\u672c\u7684\u7b97\u8853\u904b\u7b97\uff0c\u9084\u662f\u8655\u7406\u66f4\u9ad8\u7d1a\u7684\u6578\u5b78\u554f\u984c\uff0cbc\u90fd\u80fd\u63d0\u4f9b\u53ef\u9760\u7684\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u7a69\u5b9a\u4e14\u9ad8\u6548\u7684\u8a08\u7b97\u74b0\u5883\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u904b\u884c\u60a8\u7684Linux\u7cfb\u7d71\uff0c\u9019\u5c07\u70ba\u60a8\u7684\u8a08\u7b97\u9700\u6c42\u63d0\u4f9b\u5f37\u5927\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u5728Linux\u4e2d\u4f7f\u7528bc\u547d\u4ee4\u986f\u793a\u5c0f\u6578\u9ede\uff0c\u9032\u884c\u7cbe\u78ba\u7684\u6578\u5b78\u8a08\u7b97\u548c\u683c\u5f0f\u5316\u8f38\u51fa\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4924],"tags":[],"class_list":["post-198461","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/198461","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"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=198461"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/198461\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=198461"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=198461"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=198461"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}