{"id":1068,"date":"2024-03-16T00:31:55","date_gmt":"2024-03-15T16:31:55","guid":{"rendered":"http:\/\/www.ccwifi.cc\/blogs\/?p=1068"},"modified":"2024-03-16T00:31:55","modified_gmt":"2024-03-15T16:31:55","slug":"%e4%ba%ba%e4%ba%ba%e9%83%bd%e8%83%bd%e8%af%bb%e6%87%82%e7%9a%84%e7%bc%96%e8%af%91%e5%99%a8%e5%8e%9f%e7%90%86","status":"publish","type":"post","link":"https:\/\/www.ccwifi.cc\/blogs\/2024\/03\/16\/%e4%ba%ba%e4%ba%ba%e9%83%bd%e8%83%bd%e8%af%bb%e6%87%82%e7%9a%84%e7%bc%96%e8%af%91%e5%99%a8%e5%8e%9f%e7%90%86\/","title":{"rendered":"\u4eba\u4eba\u90fd\u80fd\u8bfb\u61c2\u7684\u7f16\u8bd1\u5668\u539f\u7406"},"content":{"rendered":"<div>\n<p>\u5728\u7ebfwifi\u8dd1\u5305 \u91d1\u521a\u5305\u8dd1\u5305 cap\u8dd1\u5305 hccapx ewsa\u5728\u7ebf \u5c31\u6765 <strong><a href=\"https:\/\/ccwifi.cc\" target=\"_blank\" rel=\"noopener\">\u63e1\u624b\u5305\u8dd1\u5305<\/a><\/strong><\/p>\n<p>\u5404\u4f4d\u597d \u53c8\u89c1\u9762\u4e86 \u6211\u662f\u66f9\u64cd \u4eca\u5929\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u7bc7\u65b0\u7684\u6559\u7a0b<\/p>\n<p>\u5e0c\u671b\u5404\u4f4d\u7ec6\u5fc3\u5b66\u4e60 \u4f4e\u8c03\u7528\u7f51<\/p>\n<\/div>\n<p><img decoding=\"async\" src=\"http:\/\/www.ccwifi.cc\/blogs\/wp-content\/uploads\/2024\/03\/1710520313491_0.jpg\" alt=\"\u5bc6\u7801\u5b57\u5178\u751f\u6210\u5668\"><\/p>\n<p>\u7f16\u7a0b\u8bed\u8a00\u7684\u5de5\u4f5c\u539f\u7406\u662f\u5982\u4f55\u7684\uff1f\u4e86\u89e3\u7f16\u8bd1\u5668\u7684\u5185\u90e8\u539f\u7406\u53ef\u4ee5\u5e2e\u52a9\u60a8\u66f4\u6709\u6548\u5730\u4f7f\u7528\u5b83\u3002\u901a\u8fc7\u6309\u7167\u7f16\u8bd1\u7684\u5de5\u4f5c\u987a\u5e8f\u9010\u6b65\u6df1\u5165\u4e86\u89e3\u7f16\u7a0b\u8bed\u8a00\u548c\u7f16\u8bd1\u5668\u7684\u5de5\u4f5c\u65b9\u5f0f\uff0c\u672c\u6587\u63d0\u4f9b\u4e86\u5927\u91cf\u7684\u94fe\u63a5\u3001\u793a\u4f8b\u4ee3\u7801\u548c\u56fe\u8868\uff0c\u4ee5\u5e2e\u52a9\u60a8\u7406\u89e3\u7f16\u8bd1\u5668\u3002\u4f5c\u8005\u6ce8\uff1a\u8fd9\u662f\u6211\u5728Medium\u4e0a\u7684\u7b2c\u4e8c\u7bc7\u6587\u7ae0\u7684\u518d\u7248\uff0c\u4e0a\u4e00\u7248\u5df2\u7ecf\u6709\u8d85\u8fc721000\u6b21\u9605\u8bfb\u3002\u6211\u5f88\u9ad8\u5174\u80fd\u591f\u5e2e\u52a9\u5230\u8bfb\u8005\u5b66\u4e60\uff0c\u56e0\u6b64\u6839\u636e\u4e0a\u4e00\u7248\u7684\u8bc4\u8bba\uff0c\u6211\u5b8c\u5168\u91cd\u5199\u4e86\u8fd9\u7bc7\u6587\u7ae0\u3002<\/p>\n<p>\u6211\u9009\u62e9Rust\u4f5c\u4e3a\u672c\u6587\u7684\u4e3b\u8981\u8bed\u8a00\u3002Rust\u662f\u4e00\u79cd\u8be6\u5c3d\u3001\u9ad8\u6548\u3001\u73b0\u4ee3\u5316\u7684\u8bed\u8a00\uff0c\u5b83\u7684\u8bbe\u8ba1\u4f7f\u5f97\u7f16\u5199\u7f16\u8bd1\u5668\u53d8\u5f97\u7b80\u5355\u3002\u6211\u975e\u5e38\u559c\u6b22\u4f7f\u7528\u5b83\u3002<\/p>\n<p>\u5199\u8fd9\u7bc7\u6587\u7ae0\u7684\u76ee\u7684\u4e3b\u8981\u662f\u5438\u5f15\u8bfb\u8005\u7684\u6ce8\u610f\u529b\uff0c\u800c\u4e0d\u662f\u63d0\u4f9b20\u591a\u9875\u4ee4\u4eba\u5934\u75bc\u7684\u9605\u8bfb\u6750\u6599\u3002\u5bf9\u4e8e\u90a3\u4e9b\u5bf9\u66f4\u6df1\u5c42\u6b21\u8bdd\u9898\u611f\u5174\u8da3\u7684\u4eba\uff0c\u6587\u7ae0\u4e2d\u6709\u8bb8\u591a\u94fe\u63a5\u53ef\u4ee5\u5f15\u5bfc\u60a8\u627e\u5230\u76f8\u5173\u7684\u8d44\u6599\uff0c\u5927\u591a\u6570\u94fe\u63a5\u6307\u5411\u7ef4\u57fa\u767e\u79d1\u3002<\/p>\n<p>\u611f\u8c22\u60a8\u7684\u5173\u6ce8\uff0c\u6211\u5e0c\u671b\u60a8\u4f1a\u559c\u6b22\u6211\u82b1\u8d39\u8d85\u8fc720\u4e2a\u5c0f\u65f6\u5199\u51fa\u7684\u8fd9\u7bc7\u6587\u7ae0\u3002\u6b22\u8fce\u5728\u6587\u7ae0\u5e95\u90e8\u7684\u8bc4\u8bba\u533a\u7559\u4e0b\u4efb\u4f55\u95ee\u9898\u6216\u5efa\u8bae\u3002<\/p>\n<p>\u7b80\u5355\u4ecb\u7ecd<br \/>\n\u7f16\u8bd1\u5668\u662f\u4ec0\u4e48\uff1f\u60a8\u6240\u8bf4\u7684\u7f16\u7a0b\u8bed\u8a00\u672c\u8d28\u4e0a\u53ea\u662f\u4e00\u4e2a\u8f6f\u4ef6\uff0c\u8fd9\u4e2a\u8f6f\u4ef6\u53eb\u505a\u7f16\u8bd1\u5668\u3002\u7f16\u8bd1\u5668\u8bfb\u53d6\u4e00\u4e2a\u6587\u672c\u6587\u4ef6\uff0c\u5e76\u7ecf\u8fc7\u5927\u91cf\u5904\u7406\uff0c\u6700\u7ec8\u751f\u6210\u4e00\u4e2a\u4e8c\u8fdb\u5236\u6587\u4ef6\u3002\u7f16\u8bd1\u5668\u7684\u8bed\u8a00\u90e8\u5206\u5c31\u662f\u5b83\u5904\u7406\u7684\u6587\u672c\u6837\u5f0f\u3002\u56e0\u4e3a\u8ba1\u7b97\u673a\u53ea\u80fd\u8bfb\u53d61\u548c0\uff0c\u800c\u4eba\u4eec\u7f16\u5199Rust\u7a0b\u5e8f\u8981\u6bd4\u76f4\u63a5\u7f16\u5199\u4e8c\u8fdb\u5236\u7a0b\u5e8f\u7b80\u5355\u5f97\u591a\uff0c\u6240\u4ee5\u7f16\u8bd1\u5668\u88ab\u7528\u6765\u5c06\u4eba\u7c7b\u53ef\u8bfb\u7684\u6587\u672c\u8f6c\u6362\u4e3a\u8ba1\u7b97\u673a\u53ef\u8bc6\u522b\u7684\u673a\u5668\u7801\u3002<\/p>\n<p>\u7f16\u8bd1\u5668\u53ef\u4ee5\u662f\u4efb\u4f55\u5c06\u6587\u672c\u6587\u4ef6\u8f6c\u6362\u4e3a\u5176\u4ed6\u6587\u4ef6\u7684\u7a0b\u5e8f\u3002\u4f8b\u5982\uff0c\u4e0b\u9762\u662f\u4e00\u4e2a\u7528Rust\u8bed\u8a00\u7f16\u5199\u7684\u7f16\u8bd1\u5668\u793a\u4f8b\uff0c\u5b83\u5c060\u8f6c\u6362\u4e3a1\uff0c\u5c061\u8f6c\u6362\u4e3a0\uff1a<\/p>\n<p>\/\/ \u5c060\u8f6c\u6362\u4e3a1\uff0c\u5c061\u8f6c\u6362\u4e3a0\u7684\u793a\u4f8b\u7f16\u8bd1\u5668<br \/>\nfn main() {<br \/>\n    let input = &#8220;1 0 1 A 1 0 1 3&#8221;;<br \/>\n    \/\/ \u904d\u5386\u8f93\u5165\u4e2d\u7684\u6bcf\u4e2a\u5b57\u7b26c<br \/>\n    let output: String = input.chars().map(|c|<br \/>\n        if c == &#8216;1&#8217; { &#8216;0&#8217; }<br \/>\n        else if c == &#8216;0&#8217; { &#8216;1&#8217; }<br \/>\n        else { c } \/\/ \u5982\u679c\u4e0d\u662f0\u62161\uff0c\u5219\u4fdd\u6301\u4e0d\u53d8<br \/>\n    ).collect();<br \/>\n    println!(&#8220;{}&#8221;, output); \/\/ \u8f93\u51fa\uff1a0 1 0 A 0 1 0 3<br \/>\n}<\/p>\n<p>\u7f16\u8bd1\u5668\u7684\u4f5c\u7528\u662f\u4ec0\u4e48\uff1f<br \/>\n\u7b80\u800c\u8a00\u4e4b\uff0c\u7f16\u8bd1\u5668\u63a5\u6536\u6e90\u4ee3\u7801\u5e76\u751f\u6210\u4e00\u4e2a\u4e8c\u8fdb\u5236\u6587\u4ef6\u3002\u7531\u4e8e\u76f4\u63a5\u4ece\u590d\u6742\u7684\u3001\u4eba\u7c7b\u53ef\u8bfb\u7684\u4ee3\u7801\u8f6c\u6362\u4e3a0\/1\u4e8c\u8fdb\u5236\u4f1a\u975e\u5e38\u590d\u6742\uff0c\u56e0\u6b64\u7f16\u8bd1\u5668\u5728\u751f\u6210\u53ef\u8fd0\u884c\u7a0b\u5e8f\u4e4b\u524d\u6709\u591a\u4e2a\u6b65\u9aa4\uff1a<\/p>\n<ol>\n<li>\u4ece\u7ed9\u5b9a\u7684\u6e90\u4ee3\u7801\u4e2d\u8bfb\u53d6\u5355\u4e2a\u8bcd\u3002\u5c06\u8fd9\u4e9b\u8bcd\u6309\u7167\u5355\u8bcd\u3001\u6570\u5b57\u3001\u7b26\u53f7\u3001\u8fd0\u7b97\u7b26\u8fdb\u884c\u5206\u7c7b\u3002<\/li>\n<li>\u901a\u8fc7\u6a21\u5f0f\u5339\u914d\u4ece\u5206\u7c7b\u597d\u7684\u8bcd\u4e2d\u627e\u51fa\u8fd0\u7b97\u7b26\uff0c\u5e76\u786e\u5b9a\u8fd9\u4e9b\u8fd0\u7b97\u7b26\u8981\u8fdb\u884c\u7684\u8fd0\u7b97\uff0c\u7136\u540e\u751f\u6210\u4e00\u4e2a\u8fd0\u7b97\u7b26\u6811\uff08\u8868\u8fbe\u5f0f\u6811\uff09\u3002<\/li>\n<li>\u6700\u540e\uff0c\u904d\u5386\u8868\u8fbe\u5f0f\u6811\u4e2d\u7684\u6240\u6709\u8fd0\u7b97\u7b26\uff0c\u751f\u6210\u76f8\u5e94\u7684\u4e8c\u8fdb\u5236\u6570\u636e\u3002<\/li>\n<\/ol>\n<p>\u5c3d\u7ba1\u6211\u8bf4\u7f16\u8bd1\u5668\u76f4\u63a5\u4ece\u8868\u8fbe\u5f0f\u6811\u8f6c\u6362\u4e3a\u4e8c\u8fdb\u5236\uff0c\u4f46\u5b9e\u9645\u4e0a\u5b83\u4f1a\u751f\u6210\u6c47\u7f16\u4ee3\u7801\uff0c\u7136\u540e\u5c06\u6c47\u7f16\u4ee3\u7801\u6c47\u7f16\/\u7f16\u8bd1\u4e3a\u4e8c\u8fdb\u5236\u6570\u636e\u3002\u6c47\u7f16\u4ee3\u7801\u7c7b\u4f3c\u4e8e\u4e00\u79cd\u9ad8\u7ea7\u3001\u4eba\u7c7b\u53ef\u8bfb\u7684\u4e8c\u8fdb\u5236\u3002<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/www.ccwifi.cc\/blogs\/wp-content\/uploads\/2024\/03\/1710520313491_1.jpg\" alt=\"\u5bc6\u7801\u5b57\u5178\u751f\u6210\u5668\"><\/p>\n<p>\u89e3\u91ca\u5668\u662f\u4ec0\u4e48\uff1f<br \/>\n\u89e3\u91ca\u5668\u4e0e\u7f16\u8bd1\u5668\u975e\u5e38\u76f8\u4f3c\uff0c\u5b83\u4e5f\u8bfb\u53d6\u7f16\u7a0b\u8bed\u8a00\u7684\u4ee3\u7801\u5e76\u5904\u7406\u8fd9\u4e9b\u4ee3\u7801\u3002\u7136\u800c\uff0c\u89e3\u91ca\u5668\u4f1a\u8df3\u8fc7\u4ee3\u7801\u751f\u6210\u7684\u6b65\u9aa4\uff0c\u76f4\u63a5\u5373\u65f6\u7f16\u8bd1\u5e76\u6267\u884c\u62bd\u8c61\u8bed\u6cd5\u6811\uff08AST\uff09\u3002\u89e3\u91ca\u5668\u7684\u6700\u5927\u4f18\u70b9\u5728\u4e8e\u5728\u8c03\u8bd5\u671f\u95f4\u8fd0\u884c\u7a0b\u5e8f\u6240\u9700\u7684\u65f6\u95f4\u8f83\u77ed\u3002\u7f16\u8bd1\u5668\u7f16\u8bd1\u4e00\u4e2a\u7a0b\u5e8f\u53ef\u80fd\u9700\u8981\u51e0\u79d2\u949f\u5230\u51e0\u5206\u949f\u7684\u65f6\u95f4\uff0c\u800c\u89e3\u91ca\u5668\u53ef\u4ee5\u7acb\u5373\u5f00\u59cb\u6267\u884c\u7a0b\u5e8f\uff0c\u65e0\u9700\u7f16\u8bd1\u3002\u89e3\u91ca\u5668\u7684\u6700\u5927\u7f3a\u70b9\u5728\u4e8e\u5b83\u5fc5\u987b\u5b89\u88c5\u5728\u7528\u6237\u7684\u8ba1\u7b97\u673a\u4e0a\u624d\u80fd\u6267\u884c\u7a0b\u5e8f\u3002<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/www.ccwifi.cc\/blogs\/wp-content\/uploads\/2024\/03\/1710520313491_2.jpg\" alt=\"\u5bc6\u7801\u5b57\u5178\u751f\u6210\u5668\"><\/p>\n<p>\u867d\u7136\u672c\u6587\u4e3b\u8981\u5173\u6ce8\u7f16\u8bd1\u5668\uff0c\u4f46\u662f\u4e86\u89e3\u7f16\u8bd1\u5668\u548c\u89e3\u91ca\u5668\u4e4b\u95f4\u7684\u533a\u522b\u4ee5\u53ca\u4e0e\u7f16\u8bd1\u5668\u76f8\u5173\u7684\u5185\u5bb9\u975e\u5e38\u91cd\u8981\u3002<\/p>\n<ol>\n<li>\u8bcd\u6cd5\u5206\u6790<br \/>\n\u7b2c\u4e00\u6b65\u662f\u5c06\u8f93\u5165\u62c6\u5206\u4e3a\u4e00\u4e2a\u4e2a\u5355\u8bcd\u3002\u8fd9\u4e00\u6b65\u88ab\u79f0\u4e3a\u8bcd\u6cd5\u5206\u6790\u6216\u5206\u8bcd\u3002\u5173\u952e\u5728\u4e8e\u5c06\u5b57\u7b26\u7ec4\u5408\u6210\u6240\u9700\u7684\u5355\u8bcd\u3001\u6807\u8bc6\u7b26\u3001\u7b26\u53f7\u7b49\u3002\u8bcd\u6cd5\u5206\u6790\u901a\u5e38\u4e0d\u9700\u8981\u5904\u7406\u903b\u8f91\u8fd0\u7b97\uff0c\u4f8b\u5982\u8ba1\u7b972+2-\uff0c\u5b9e\u9645\u4e0a\u8fd9\u4e2a\u8868\u8fbe\u5f0f\u53ea\u6709\u4e09\u4e2a\u6807\u8bb0\uff1a\u4e00\u4e2a\u6570\u5b572\uff0c\u4e00\u4e2a\u52a0\u53f7\uff0c\u53e6\u4e00\u4e2a\u6570\u5b572\u3002<\/li>\n<\/ol>\n<p>\u8ba9\u6211\u4eec\u5047\u8bbe\u60a8\u6b63\u5728\u89e3\u6790\u4e00\u4e2a\u7c7b\u4f3c\u4e8e12+3\u7684\u5b57\u7b26\u4e32\uff1a\u5b83\u4f1a\u8bfb\u53d6\u5b57\u7b261\u30012\u3001+\u548c3\u3002\u6211\u4eec\u5df2\u7ecf\u5c06\u8fd9\u4e9b\u5b57\u7b26\u62c6\u5206\u5f00\u4e86\uff0c\u4f46\u73b0\u5728\u6211\u4eec\u9700\u8981\u5c06\u5b83\u4eec\u7ec4\u5408\u8d77\u6765\uff1b\u8fd9\u662f\u5206\u8bcd\u5668\u7684\u4e3b\u8981\u4efb\u52a1\u4e4b\u4e00\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u5f97\u5230\u4e86\u4e24\u4e2a\u5355\u72ec\u7684\u5b57\u7b261\u548c2\uff0c\u4f46\u6211\u4eec\u9700\u8981\u5c06\u5b83\u4eec\u7ec4\u5408\u5728\u4e00\u8d77\uff0c\u7136\u540e\u5c06\u5b83\u4eec\u89e3\u6790\u4e3a\u4e00\u4e2a\u6574\u6570\u3002\u5bf9\u4e8e+\uff0c\u6211\u4eec\u9700\u8981\u8bc6\u522b\u5b83\u4e3a\u52a0\u53f7\uff0c\u800c\u4e0d\u662f\u5176\u5b57\u7b26\u503c-\u5b57\u7b26\u503c\u4e3a43\u3002<\/p>\n<p>\u5982\u679c\u60a8\u80fd\u591f\u9605\u8bfb\u4e0a\u9762\u7684\u4ee3\u7801\u5e76\u7406\u89e3\u5176\u542b\u4e49\uff0c\u63a5\u4e0b\u6765\u7684Rust\u5206\u8bcd\u5668\u5c06\u5c06\u6570\u5b57\u7ec4\u5408\u4e3a32\u4f4d\u6574\u6570\uff0c\u7136\u540e\u5c06\u52a0\u53f7\u89e3\u6790\u4e3a\u6807\u8bb0\u503cPlus\uff08\u52a0\uff09\u3002<\/p>\n<p>\u60a8\u53ef\u4ee5\u70b9\u51fbRust Playground\u5de6\u4e0a\u89d2\u7684\u201cRun\u201d\u6309\u94ae\u6765\u7f16\u8bd1\u548c\u6267\u884c\u60a8\u5728\u6d4f\u89c8\u5668\u4e2d\u7684\u4ee3\u7801\u3002<\/p>\n<p>\u5728\u7f16\u7a0b\u8bed\u8a00\u7684\u7f16\u8bd1\u5668\u4e2d\uff0c\u8bcd\u6cd5\u89e3\u6790\u5668\u53ef\u80fd\u9700\u8981\u5904\u7406\u8bb8\u591a\u4e0d\u540c\u7c7b\u578b\u7684\u6807\u8bb0\u3002\u4f8b\u5982\uff1a\u7b26\u53f7\u3001\u6570\u5b57\u3001\u6807\u8bc6\u7b26\u3001\u5b57\u7b26\u4e32\u3001\u64cd\u4f5c\u7b26\u7b49\u3002\u8981\u4ece\u6e90\u6587\u4ef6\u4e2d\u63d0\u53d6\u54ea\u4e9b\u6807\u8bb0\u5b8c\u5168\u53d6\u51b3\u4e8e\u7f16\u7a0b\u8bed\u8a00\u672c\u8eab\u3002<\/p>\n<p>int main() {<br \/>\n    int a;<br \/>\n    int b;<br \/>\n    a = b = 4;<br \/>\n    return a &#8211; b;<br \/>\n}<\/p>\n<p>\u626b\u63cf\u5668\u751f\u6210\u7684\u6807\u8bb0\u5e8f\u5217\uff1a<br \/>\n[Keyword(Int), Id(&#8220;main&#8221;), Symbol(LParen), Symbol(RParen), Symbol(LBrace), Keyword(Int), Id(&#8220;a&#8221;), Symbol(Semicolon), Keyword(Int), Id(&#8220;b&#8221;), Symbol(Semicolon), Id(&#8220;a&#8221;), Operator(Assignment), Id(&#8220;b&#8221;), Operator(Assignment), Integer(4), Symbol(Semicolon), Keyword(Return), Id(&#8220;a&#8221;), Operator(Minus), Id(&#8220;b&#8221;), Symbol(Semicolon), Symbol(RBrace)]<\/p>\n<p>\u8fd9\u662fC\u8bed\u8a00\u793a\u4f8b\u4ee3\u7801\u7ecf\u8fc7\u8bcd\u6cd5\u5206\u6790\u540e\u751f\u6210\u7684\u6807\u8bb0\u3002<\/p>\n<ol start=\"2\">\n<li>\u89e3\u6790<br \/>\n\u89e3\u6790\u5668\u662f\u8bed\u6cd5\u89e3\u6790\u7684\u6838\u5fc3\u3002\u89e3\u6790\u5668\u63a5\u6536\u8bcd\u6cd5\u5206\u6790\u5668\u751f\u6210\u7684\u6807\u8bb0\uff0c\u5e76\u5c1d\u8bd5\u786e\u5b9a\u5b83\u4eec\u662f\u5426\u7b26\u5408\u7279\u5b9a\u7684\u6a21\u5f0f\uff0c\u7136\u540e\u5c06\u8fd9\u4e9b\u6a21\u5f0f\u4e0e\u51fd\u6570\u8c03\u7528\u3001\u53d8\u91cf\u8c03\u7528\u3001\u6570\u5b66\u8fd0\u7b97\u7b49\u8868\u8fbe\u5f0f\u76f8\u5173\u8054\u3002\u89e3\u6790\u5668\u9010\u8bcd\u5730\u5b9a\u4e49\u7f16\u7a0b\u8bed\u8a00\u7684\u8bed\u6cd5\u3002<\/li>\n<\/ol>\n<p>int a = 3\u548ca: int = 3\u4e4b\u95f4\u7684\u533a\u522b\u5728\u4e8e\u89e3\u6790\u5668\u7684\u5904\u7406\u65b9\u5f0f\u3002\u89e3\u6790\u5668\u51b3\u5b9a\u4e86\u8bed\u6cd5\u7684\u5916\u90e8\u5f62\u5f0f\u3002\u5b83\u786e\u4fdd\u62ec\u53f7\u548c\u82b1\u62ec\u53f7\u7684\u5de6\u53f3\u62ec\u53f7\u6570\u91cf\u5e73\u8861\uff0c\u6bcf\u4e2a\u8bed\u53e5\u7ed3\u5c3e\u90fd\u6709\u4e00\u4e2a\u5206\u53f7\uff0c\u6bcf\u4e2a\u51fd\u6570\u90fd\u6709\u4e00\u4e2a\u540d\u79f0\u3002\u5f53\u6807\u8bb0\u4e0d\u7b26\u5408\u9884\u671f\u7684\u6a21\u5f0f\u65f6\uff0c\u89e3\u6790\u5668\u4f1a\u77e5\u9053\u6807\u8bb0\u7684\u987a\u5e8f\u4e0d\u6b63\u786e\u3002<\/p>\n<p>\u60a8\u53ef\u4ee5\u7f16\u5199\u591a\u79cd\u4e0d\u540c\u7c7b\u578b\u7684\u89e3\u6790\u5668\u3002\u5176\u4e2d\u4e00\u79cd\u6700\u5e38\u89c1\u7684\u89e3\u6790\u5668\u662f\u81ea\u4e0a\u800c\u4e0b\u7684\u9012\u5f52\u4e0b\u964d\u89e3\u6790\u5668\u3002\u9012\u5f52\u4e0b\u964d\u89e3\u6790\u5668\u662f\u6700\u7b80\u5355\u4e14\u6700\u5bb9\u6613\u7406\u89e3\u7684\u89e3\u6790\u5668\u3002\u6211\u63d0\u4f9b\u7684\u6240\u6709\u89e3\u6790\u5668\u793a\u4f8b\u90fd\u57fa\u4e8e\u9012\u5f52\u4e0b\u964d\u89e3\u6790\u5668\u3002<\/p>\n<p>\u89e3\u6790\u5668\u7684\u8bed\u6cd5\u53ef\u4ee5\u4f7f\u7528\u4e00\u79cd\u8bed\u6cd5\u8868\u793a\u3002\u4f8b\u5982\uff0c\u50cfEBNF\u8fd9\u6837\u7684\u8bed\u6cd5\u53ef\u4ee5\u63cf\u8ff0\u89e3\u6790\u5668\u7528\u4e8e\u89e3\u6790\u7b80\u5355\u6570\u5b66\u8fd0\u7b97\u7684\u8bed\u6cd5\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<p>expr = additive<em>expr ;<br \/>\nadditive<\/em>expr = term, (&#8216;+&#8217; | &#8216;-&#8216;), term ;<br \/>\nterm = number ;<\/p>\n<p>\u8fd9\u662f\u7b80\u5355\u52a0\u6cd5\u548c\u51cf\u6cd5\u8868\u8fbe\u5f0f\u7684EBNF\u8bed\u6cd5\u3002<\/p>\n<p>\u8bf7\u8bb0\u4f4f\uff0c\u8bed\u6cd5\u6587\u4ef6\u672c\u8eab\u5e76\u4e0d\u662f\u89e3\u6790\u5668\uff0c\u4f46\u5b83\u786e\u5b9e\u662f\u89e3\u6790\u5668\u7684\u4e00\u79cd\u8868\u8fbe\u5f62\u5f0f\u3002\u60a8\u53ef\u4ee5\u56f4\u7ed5\u4e0a\u8ff0\u8bed\u6cd5\u521b\u5efa\u4e00\u4e2a\u89e3\u6790\u5668\u3002\u4e0e\u76f4\u63a5\u9605\u8bfb\u548c\u7406\u89e3\u89e3\u6790\u5668\u4ee3\u7801\u76f8\u6bd4\uff0c\u8bed\u6cd5\u6587\u4ef6\u5bf9\u4eba\u6765\u8bf4\u66f4\u5bb9\u6613\u4f7f\u7528\u548c\u7406\u89e3\u3002<\/p>\n<p>\u5bf9\u4e8e\u89e3\u6790\u5668\u6765\u8bf4\uff0c\u6700\u91cd\u8981\u7684\u662fexpr\u89e3\u6790\u5668\uff0c\u56e0\u4e3a\u5b83\u76f4\u63a5\u4e0e\u6240\u6709\u5185\u5bb9\u76f8\u5173\u3002\u552f\u4e00\u6709\u6548\u7684\u8f93\u5165\u5fc5\u987b\u662f\u4efb\u610f\u6570\u5b57\u3001\u52a0\u53f7\u6216\u51cf\u53f7\u3001\u4efb\u610f\u6570\u5b57\u3002expr\u9700\u8981\u4e00\u4e2aadditive<em>expr\uff0c\u8fd9\u4e3b\u8981\u51fa\u73b0\u5728\u52a0\u6cd5\u548c\u51cf\u6cd5\u8868\u8fbe\u5f0f\u4e2d\u3002additive<\/em>expr\u9996\u5148\u9700\u8981\u4e00\u4e2aterm\uff08\u4e00\u4e2a\u6570\u5b57\uff09\uff0c\u7136\u540e\u662f\u52a0\u53f7\u6216\u51cf\u53f7\uff0c\u6700\u540e\u662f\u53e6\u4e00\u4e2aterm\u3002<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/www.ccwifi.cc\/blogs\/wp-content\/uploads\/2024\/03\/1710520313491_3.jpg\" alt=\"\u5bc6\u7801\u5b57\u5178\u751f\u6210\u5668\"><\/p>\n<p>\u89e3\u679012+3\u751f\u6210\u7684\u793a\u4f8bAST<br \/>\n\u89e3\u6790\u5668\u5728\u89e3\u6790\u8fc7\u7a0b\u4e2d\u751f\u6210\u7684\u6811\u72b6\u7ed3\u6784\u79f0\u4e3a\u62bd\u8c61\u8bed\u6cd5\u6811\uff08AST\uff09\u3002AST\u5305\u542b\u4e86\u6240\u6709\u8981\u8fdb\u884c\u64cd\u4f5c\u7684\u4fe1\u606f\u3002\u89e3\u6790\u5668\u4e0d\u4f1a\u8ba1\u7b97\u8fd9\u4e9b\u64cd\u4f5c\uff0c\u5b83\u53ea\u662f\u4ee5\u6b63\u786e\u7684\u987a\u5e8f\u6536\u96c6\u6807\u8bb0\u3002<\/p>\n<p>\u6211\u4e4b\u524d\u8865\u5145\u4e86\u6211\u4eec\u7684\u8bcd\u6cd5\u5206\u6790\u5668\u4ee3\u7801\uff0c\u4ee5\u4f7f\u5176\u4e0e\u6211\u4eec\u7684\u8bed\u6cd5\u5339\u914d\uff0c\u5e76\u4e14\u53ef\u4ee5\u751f\u6210\u7c7b\u4f3c\u56fe\u8868\u7684AST\u3002\u6211\u5728\u4ee3\u7801\u4e2d\u4f7f\u7528\u4e86\/\/ BEGIN PARSER\/\/\u548c\/\/ END PARSER\/\/\u7684\u6ce8\u91ca\u6807\u8bb0\u51fa\u65b0\u7684\u89e3\u6790\u5668\u4ee3\u7801\u7684\u5f00\u5934\u548c\u7ed3\u5c3e\u3002<\/p>\n<p>\u60a8\u53ef\u4ee5\u70b9\u51fb\u4e0a\u9762\u7684\u94fe\u63a5\u67e5\u770b\u5de6\u4fa7\u6837\u4f8b\u4ee3\u7801\u751f\u6210\u7684\u6c47\u7f16\u4ee3\u7801\u3002\u6c47\u7f16\u4ee3\u7801\u7684\u7b2c\u4e09\u884c\u548c\u7b2c\u56db\u884c\u5c55\u793a\u4e86\u7f16\u8bd1\u5668\u5728\u9047\u5230\u5e38\u91cf\u65f6\u5982\u4f55\u4e3a\u5176\u751f\u6210\u76f8\u5e94\u7684\u4ee3\u7801\u3002<\/p>\n<p>Godbolt Compiler 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