{"id":206419,"date":"2025-06-12T09:20:35","date_gmt":"2025-06-12T01:20:35","guid":{"rendered":"https:\/\/server.hk\/cnblog\/206419\/"},"modified":"2025-06-12T09:20:35","modified_gmt":"2025-06-12T01:20:35","slug":"%e7%b3%bb%e7%bb%9f%e8%ae%be%e8%ae%a1%ef%bc%9a%e7%94%a8go%e6%9e%84%e5%bb%ba%e5%81%9c%e8%bd%a6%e5%9c%ba%e7%b3%bb%e7%bb%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/206419\/","title":{"rendered":"\u7cfb\u7edf\u8bbe\u8ba1\uff1a\u7528Go\u6784\u5efa\u505c\u8f66\u573a\u7cfb\u7edf"},"content":{"rendered":"<p>\u73cd\u60dc\u65f6\u95f4\uff0c\u52e4\u594b\u5b66\u4e60\uff01\u4eca\u5929\u7ed9\u5927\u5bb6\u5e26\u6765<br \/>\n<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300a\u7cfb\u7edf\u8bbe\u8ba1\uff1a\u7528Go\u6784\u5efa\u505c\u8f66\u573a\u7cfb\u7edf\u300b<\/span>\uff0c\u6b63\u6587\u5185\u5bb9\u4e3b\u8981\u6d89\u53ca\u5230<br \/>\n<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\u7b49\u7b49\uff0c\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60<br \/>\n<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">GOLANG<\/span>\uff0c\u6216\u8005\u662f\u5bf9<br \/>\n<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">GOLANG<\/span>\u6709\u7591\u95ee\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u6211\uff01\u540e\u9762\u6211\u4f1a\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u5185\u5bb9\u7684\uff0c\u5e0c\u671b\u90fd\u80fd\u5e2e\u5230\u6b63\u5728\u5b66\u4e60\u7684\u5927\u5bb6\uff01,\u5728\u672c\u6587\u4e2d\uff0c\u6211\u4eec\u5c06\u4ecb\u7ecd go \u4e2d\u505c\u8f66\u573a\u7cfb\u7edf\u7684\u4f4e\u7ea7\u8bbe\u8ba1 (lld) 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\/>\n<br \/>,\u4f7f\u7528sync.once\uff0c\u6211\u4eec\u786e\u4fdd\u53ea\u521b\u5efa\u4e00\u4e2a\u5b9e\u4f8b\uff0c\u5373\u4f7f\u88ab\u591a\u4e2a goroutine \u8bbf\u95ee\u4e5f\u662f\u5982\u6b64\u3002,\u505c\u8f66\u573a\u6709\u591a\u5c42\uff0c\u6bcf\u5c42\u90fd\u6709\u9488\u5bf9\u4e0d\u540c\u8f66\u8f86\u7c7b\u578b\uff08\u4f8b\u5982\u6c7d\u8f66\u3001\u8d27\u8f66\u3001\u5361\u8f66\u548c\u6469\u6258\u8f66\uff09\u7684\u6307\u5b9a\u505c\u8f66\u4f4d\u3002\u8981\u5411\u505c\u8f66\u573a\u6dfb\u52a0\u697c\u5c42\uff0c\u6211\u4eec\u4f7f\u7528 addfloor \u65b9\u6cd5\uff1a<br \/>\n<br \/>,\u6bcf\u4e2a\u697c\u5c42\u90fd\u662f\u4f7f\u7528 newparkingfloor \u51fd\u6570\u521b\u5efa\u7684\uff0c\u8be5\u51fd\u6570\u6309\u8f66\u8f86\u7c7b\u578b\u7ec4\u7ec7\u505c\u8f66\u4f4d\u3002,\u6bcf\u4e2a parkingspot \u90fd\u4e0e\u7279\u5b9a\u7684\u8f66\u8f86\u7c7b\u578b\uff08\u4f8b\u5982\u6c7d\u8f66\u6216\u6469\u6258\u8f66\uff09\u76f8\u5173\u8054\u3002\u8fd9\u4f7f\u5f97\u7cfb\u7edf\u80fd\u591f\u7ba1\u7406\u548c\u9650\u5236\u6bcf\u4e2a\u505c\u8f66\u4f4d\u53ef\u4ee5\u505c\u653e\u7684\u8f66\u8f86\u3002\u8fd9\u662f parkingspot \u7ed3\u6784\u548c parkvehicle \u65b9\u6cd5\uff1a<br \/>\n<br \/>,\u6211\u4eec\u4f7f\u7528\u4e92\u65a5\u9501\u6765\u786e\u4fdd\u540c\u4e00\u65f6\u95f4\u53ea\u80fd\u505c\u653e\u4e00\u8f86\u8f66\u3002,\u6bcf\u8f86\u8f66\u90fd\u4f1a\u6536\u5230\u4e00\u5f20\u7968\uff0c\u4e0a\u9762\u6709\u8fdb\u5165\u65f6\u95f4\u3001\u79bb\u5f00\u65f6\u95f4\u3001\u505c\u8f66\u4f4d\u548c\u603b\u8d39\u7528\u3002\u6b64\u7968\u4f1a\u5728\u8f66\u8f86\u9000\u51fa\u65f6\u66f4\u65b0\uff0c\u5e76\u6839\u636e\u505c\u8f66\u65f6\u95f4\u8ba1\u7b97\u8d39\u7528\u3002<br \/>\n<br \/>,calculatetotalcharge \u65b9\u6cd5\u6839\u636e\u8f66\u8f86\u7c7b\u578b\u548c\u6301\u7eed\u65f6\u95f4\u8ba1\u7b97\u505c\u8f66\u8d39\u3002,paymentsystem \u7c7b\u5904\u7406\u4ed8\u6b3e\uff0c\u6839\u636e\u662f\u5426\u652f\u4ed8\u6240\u9700\u91d1\u989d\u66f4\u65b0\u4ed8\u6b3e\u72b6\u6001\uff1a<br \/>\n<br \/>,processpayment \u51fd\u6570\u68c0\u67e5\u91d1\u989d\u5e76\u5c06\u4ed8\u6b3e\u72b6\u6001\u66f4\u65b0\u4e3a\u201c\u5df2\u5b8c\u6210\u201d\u6216\u201c\u5931\u8d25\u201d\u3002,\u6211\u4eec\u7684\u7cfb\u7edf\u652f\u6301\u4e0d\u540c\u7c7b\u578b\u7684\u8f66\u8f86\uff08\u6c7d\u8f66\u3001\u8d27\u8f66\u3001\u5361\u8f66\u548c\u6469\u6258\u8f66\uff09\u3002\u6bcf\u79cd\u7c7b\u578b\u7684\u6bcf\u5c0f\u65f6\u8d39\u7528\u4e0d\u540c\u3002\u8fd9\u662f\u901a\u8fc7\u5728\u5355\u72ec\u7684\u8f66\u8f86\u5305\u4e2d\u8bbe\u7f6e vehicletype \u548c vehicleinterface \u6765\u5b9e\u73b0\u7684\uff1a<br \/>\n<br \/>,\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u8c03\u7528newcar\u3001newvan\u3001newtruck\u7b49\u6765\u521b\u5efa\u65b0\u7684\u8f66\u8f86\uff0c\u5b83\u4eec\u90fd\u5b9e\u73b0\u4e86vehicleinterface\u3002,\u8ba9\u6211\u4eec\u770b\u770b\u5404\u4e2a\u90e8\u5206\u5982\u4f55\u5728\u6d41\u7a0b\u4e2d\u7ec4\u5408\u5728\u4e00\u8d77\uff1a,\u8fd9\u4e2a\u505c\u8f66\u573a\u7cfb\u7edf\u662f\u6784\u5efa\u66f4\u590d\u6742\u7cfb\u7edf\u7684\u7b80\u5316\u8d77\u70b9\u3002\u6211\u4eec\u4ecb\u7ecd\u4e86\u697c\u5c42\u548c\u505c\u8f66\u4f4d\u7ba1\u7406\u3001\u8f66\u8f86\u505c\u8f66\u548c\u51fa\u5e93\u4ee5\u53ca\u57fa\u672c\u4ed8\u6b3e\u6d41\u7a0b\u7684\u57fa\u7840\u77e5\u8bc6\u3002,\u6709\u5173\u5b8c\u6574\u4ee3\u7801\u5b9e\u73b0\uff0c\u8bf7\u68c0\u67e5\u4ee5\u4e0b\u5b58\u50a8\u5e93\uff1a<br \/>\n<br \/>,\u5230\u8fd9\u91cc\uff0c\u6211\u4eec\u4e5f\u5c31\u8bb2\u5b8c\u4e86\u300a\u7cfb\u7edf\u8bbe\u8ba1\uff1a\u7528Go\u6784\u5efa\u505c\u8f66\u573a\u7cfb\u7edf\u300b\u7684\u5185\u5bb9\u4e86\u3002\u4e2a\u4eba\u8ba4\u4e3a\uff0c\u57fa\u7840\u77e5\u8bc6\u7684\u5b66\u4e60\u548c\u5de9\u56fa\uff0c\u662f\u4e3a\u4e86\u66f4\u597d\u7684\u5c06\u5176\u8fd0\u7528\u5230\u9879\u76ee\u4e2d\uff0c\u6b22\u8fce\u5173\u6ce8GOLANG\u516c\u4f17\u53f7\uff0c\u5e26\u4f60\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u7684\u77e5\u8bc6\u70b9\uff01,<br \/>\n<strong>\u67e5\u627e\u505c\u8f66\u4f4d\u5e76\u505c\u653e\u8f66\u8f86<\/strong>\uff1aparkvehicle \u65b9\u6cd5\u67e5\u627e\u53ef\u7528\u505c\u8f66\u4f4d\uff0c\u6839\u636e\u8f66\u8f86\u7c7b\u578b\u5bf9\u5176\u8fdb\u884c\u9a8c\u8bc1\uff0c\u5e76\u751f\u6210\u7968\u8bc1\u3002,<br \/>\n<strong>\u521b\u5efa\u505c\u8f66\u573a<\/strong>\uff1a\u8c03\u7528 getparkinglotinstance() \u5e76\u4f7f\u7528 addfloor \u6dfb\u52a0\u697c\u5c42\u3002,<br \/>\n<strong>unpark vehicle \u5e76\u5904\u7406\u4ed8\u6b3e<\/strong>\uff1aunparkvehicle \u751f\u6210\u603b\u8d39\u7528\uff0c\u542f\u52a8\u652f\u4ed8\u7cfb\u7edf\uff0c\u5e76\u5b8c\u6210\u4ea4\u6613\u3002,\u73cd\u60dc\u65f6\u95f4\uff0c\u52e4\u594b\u5b66\u4e60\uff01\u4eca\u5929\u7ed9\u5927\u5bb6\u5e26\u6765<br \/>\n<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300a\u7cfb\u7edf\u8bbe\u8ba1\uff1a\u7528Go\u6784\u5efa\u505c\u8f66\u573a\u7cfb\u7edf\u300b<\/span>\uff0c\u6b63\u6587\u5185\u5bb9\u4e3b\u8981\u6d89\u53ca\u5230<br \/>\n<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\u7b49\u7b49\uff0c\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60<br \/>\n<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">GOLANG<\/span>\uff0c\u6216\u8005\u662f\u5bf9<br \/>\n<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">GOLANG<\/span>\u6709\u7591\u95ee\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u6211\uff01\u540e\u9762\u6211\u4f1a\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u5185\u5bb9\u7684\uff0c\u5e0c\u671b\u90fd\u80fd\u5e2e\u5230\u6b63\u5728\u5b66\u4e60\u7684\u5927\u5bb6\uff01,<br \/>\n<b><\/b> <\/p>\n<p>\u5f53\u524d\u4f4d\u7f6e\uff1a <span>&gt;<\/span>  <span>&gt;<\/span>  <span>&gt;<\/span>  <span>&gt;<\/span> <span>\u7cfb\u7edf\u8bbe\u8ba1\uff1a\u7528Go\u6784\u5efa\u505c\u8f66\u573a\u7cfb\u7edf<\/span><\/p>\n<h1>\u7cfb\u7edf\u8bbe\u8ba1\uff1a\u7528Go\u6784\u5efa\u505c\u8f66\u573a\u7cfb\u7edf<\/h1>\n<p><span>\u6765\u6e90\uff1adev.to<\/span><br \/>\n<span>2024-11-11 18:40:08<\/span><br \/>\n<span><i><\/i>0\u6d4f\u89c8<\/span><br \/>\n<span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>\u73cd\u60dc\u65f6\u95f4\uff0c\u52e4\u594b\u5b66\u4e60\uff01\u4eca\u5929\u7ed9\u5927\u5bb6\u5e26\u6765<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300a\u7cfb\u7edf\u8bbe\u8ba1\uff1a\u7528Go\u6784\u5efa\u505c\u8f66\u573a\u7cfb\u7edf\u300b<\/span>\uff0c\u6b63\u6587\u5185\u5bb9\u4e3b\u8981\u6d89\u53ca\u5230<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\u7b49\u7b49\uff0c\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">GOLANG<\/span>\uff0c\u6216\u8005\u662f\u5bf9<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">GOLANG<\/span>\u6709\u7591\u95ee\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u6211\uff01\u540e\u9762\u6211\u4f1a\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u5185\u5bb9\u7684\uff0c\u5e0c\u671b\u90fd\u80fd\u5e2e\u5230\u6b63\u5728\u5b66\u4e60\u7684\u5927\u5bb6\uff01<\/p>\n<p>\u5728\u672c\u6587\u4e2d\uff0c\u6211\u4eec\u5c06\u4ecb\u7ecd go \u4e2d\u505c\u8f66\u573a\u7cfb\u7edf\u7684\u4f4e\u7ea7\u8bbe\u8ba1 (lld) \u5b9e\u73b0\u3002\u6211\u4eec\u5c06\u63a2\u7d22\u7cfb\u7edf\u7684\u4e0d\u540c\u65b9\u9762\uff0c\u5e76\u4e86\u89e3\u6bcf\u4e2a\u7ec4\u4ef6\u5982\u4f55\u4e0e\u5176\u4f59\u7ec4\u4ef6\u4ea4\u4e92\u3002\u6b64\u5b9e\u73b0\u4fa7\u91cd\u4e8e\u6e05\u6670\u5ea6\u548c\u73b0\u5b9e\u4e16\u754c\u7684\u5b9e\u7528\u6027\uff0c\u56e0\u6b64\u5982\u679c\u60a8\u60f3\u6dfb\u52a0\u66f4\u591a\u8f66\u8f86\u7c7b\u578b\u3001\u591a\u79cd\u4ed8\u6b3e\u9009\u9879\u6216\u73b0\u8d27\u9884\u8ba2\u7b49\u529f\u80fd\uff0c\u60a8\u53ef\u4ee5\u8f7b\u677e\u6269\u5c55\u5b83\u3002<\/p>\n<p>\u8be5\u7cfb\u7edf\u5904\u7406\u8bf8\u5982\u7ba1\u7406\u505c\u8f66\u697c\u5c42\u548c\u505c\u8f66\u4f4d\u3001\u505c\u653e\u8f66\u8f86\u548c\u5904\u7406\u4ed8\u6b3e\u7b49\u4efb\u52a1\u3002\u6211\u4eec\u8fd8\u5c06\u786e\u4fdd\u5b83\u5bf9\u4e8e\u5e76\u53d1\u8bbf\u95ee\u662f\u7ebf\u7a0b\u5b89\u5168\u7684\uff0c\u56e0\u6b64\u5982\u679c\u6211\u4eec\u9700\u8981\u5c06\u5176\u6269\u5c55\u5230\u66f4\u5927\u7684\u7cfb\u7edf\uff0c\u5b83\u4e0d\u4f1a\u5728\u538b\u529b\u4e0b\u5d29\u6e83\u3002<\/p>\n<hr>\n<h2> \u6838\u5fc3\u7ec4\u4ef6 <\/h2>\n<p>\u6211\u4eec\u7684\u8bbe\u8ba1\u5305\u62ec\u516d\u4e2a\u4e3b\u8981\u7ec4\u6210\u90e8\u5206\uff1a<\/p>\n<ol>\n<li> <strong>\u505c\u8f66\u573a<\/strong> &#8211; \u7ba1\u7406\u697c\u5c42\u548c\u505c\u8f66\u64cd\u4f5c\u7684\u4e3b\u8981\u5165\u53e3\u70b9\u3002<\/li>\n<li> <strong>\u505c\u8f66\u573a<\/strong> &#8211; \u6bcf\u5c42\u90fd\u6709\u591a\u4e2a\u505c\u8f66\u4f4d\uff0c\u53ef\u505c\u653e\u4e0d\u540c\u7c7b\u578b\u7684\u8f66\u8f86\u3002<\/li>\n<li> <strong>\u505c\u8f66\u4f4d<\/strong> &#8211; \u4ee3\u8868\u53ef\u505c\u653e\u7279\u5b9a\u7c7b\u578b\u8f66\u8f86\u7684\u505c\u8f66\u4f4d\u3002<\/li>\n<li> <strong>\u505c\u8f66\u7968<\/strong> &#8211; \u8ddf\u8e2a\u8fdb\u5165\/\u9000\u51fa\u65f6\u95f4\u3001\u505c\u8f66\u8d39\u7528\u548c\u76f8\u5173\u8f66\u8f86\u3002<\/li>\n<li> <strong>\u652f\u4ed8\u7cfb\u7edf<\/strong> &#8211; \u5904\u7406\u505c\u8f66\u8d39\u8ba1\u7b97\u548c\u4ed8\u6b3e\u5904\u7406\u3002<\/li>\n<li> <strong>\u8f66\u8f86\u7c7b\u578b<\/strong> &#8211; \u652f\u6301\u4e0d\u540c\u7c7b\u578b\u7684\u8f66\u8f86\uff08\u6c7d\u8f66\u3001\u8d27\u8f66\u3001\u5361\u8f66\u548c\u6469\u6258\u8f66\uff09\u3002\u6bcf\u79cd\u7c7b\u578b\u7684\u6bcf\u5c0f\u65f6\u8d39\u7528\u4e0d\u540c\u3002<\/li>\n<\/ol>\n<h3> \u8f9b\u683c\u5c14\u987f\u505c\u8f66\u573a <\/h3>\n<p>\u6211\u4eec\u7684\u505c\u8f66\u573a\u4f7f\u7528\u5355\u4f8b\u6a21\u5f0f\u3002\u8fd9\u610f\u5473\u7740\u505c\u8f66\u573a\u53ea\u6709\u4e00\u4e2a\u5b9e\u4f8b\uff0c\u8be5\u5b9e\u4f8b\u521b\u5efa\u4e00\u6b21\u5e76\u5728\u6574\u4e2a\u5e94\u7528\u7a0b\u5e8f\u4e2d\u91cd\u590d\u4f7f\u7528\u3002\u8fd9\u662f\u4f7f\u5176\u6b63\u5e38\u5de5\u4f5c\u7684\u4ee3\u7801\uff1a<\/p>\n<pre>var (\n    parkinglotinstance *parkinglot\n    once               sync.once\n)\n\ntype parkinglot struct {\n    name   string\n    floors []*parkingfloor\n}\n\nfunc getparkinglotinstance() *parkinglot {\n    once.do(func() {\n        parkinglotinstance = &amp;parkinglot{}\n    })\n    return parkinglotinstance\n}\n<\/pre>\n<p>\u4f7f\u7528sync.once\uff0c\u6211\u4eec\u786e\u4fdd\u53ea\u521b\u5efa\u4e00\u4e2a\u5b9e\u4f8b\uff0c\u5373\u4f7f\u88ab\u591a\u4e2a goroutine \u8bbf\u95ee\u4e5f\u662f\u5982\u6b64\u3002<\/p>\n<h3> \u505c\u8f66\u573a\u697c\u5c42\u7ba1\u7406 <\/h3>\n<p>\u505c\u8f66\u573a\u6709\u591a\u5c42\uff0c\u6bcf\u5c42\u90fd\u6709\u9488\u5bf9\u4e0d\u540c\u8f66\u8f86\u7c7b\u578b\uff08\u4f8b\u5982\u6c7d\u8f66\u3001\u8d27\u8f66\u3001\u5361\u8f66\u548c\u6469\u6258\u8f66\uff09\u7684\u6307\u5b9a\u505c\u8f66\u4f4d\u3002\u8981\u5411\u505c\u8f66\u573a\u6dfb\u52a0\u697c\u5c42\uff0c\u6211\u4eec\u4f7f\u7528 addfloor \u65b9\u6cd5\uff1a<\/p>\n<pre>func (p *parkinglot) addfloor(floorid int) {\n    p.floors = append(p.floors, newparkingfloor(floorid))\n}\n<\/pre>\n<p>\u6bcf\u4e2a\u697c\u5c42\u90fd\u662f\u4f7f\u7528 newparkingfloor \u51fd\u6570\u521b\u5efa\u7684\uff0c\u8be5\u51fd\u6570\u6309\u8f66\u8f86\u7c7b\u578b\u7ec4\u7ec7\u505c\u8f66\u4f4d\u3002<\/p>\n<h3> \u505c\u8f66\u4f4d <\/h3>\n<p>\u6bcf\u4e2a parkingspot \u90fd\u4e0e\u7279\u5b9a\u7684\u8f66\u8f86\u7c7b\u578b\uff08\u4f8b\u5982\u6c7d\u8f66\u6216\u6469\u6258\u8f66\uff09\u76f8\u5173\u8054\u3002\u8fd9\u4f7f\u5f97\u7cfb\u7edf\u80fd\u591f\u7ba1\u7406\u548c\u9650\u5236\u6bcf\u4e2a\u505c\u8f66\u4f4d\u53ef\u4ee5\u505c\u653e\u7684\u8f66\u8f86\u3002\u8fd9\u662f parkingspot \u7ed3\u6784\u548c parkvehicle \u65b9\u6cd5\uff1a<\/p>\n<pre>type parkingspot struct {\n    spotid         int\n    vehicletype    vehicles.vehicletype\n    currentvehicle *vehicles.vehicleinterface\n    lock           sync.mutex\n}\n\nfunc (p *parkingspot) parkvehicle(vehicle vehicles.vehicleinterface) error {\n    p.lock.lock()\n    defer p.lock.unlock()\n\n    if vehicle.getvehicletype() != p.vehicletype {\n        return fmt.errorf(\"vehicle type mismatch: expected %s, got %s\", p.vehicletype, vehicle.getvehicletype())\n    }\n    if p.currentvehicle != nil {\n        return fmt.errorf(\"parking spot already occupied\")\n    }\n\n    p.currentvehicle = &amp;vehicle\n    return nil\n}\n<\/pre>\n<p>\u6211\u4eec\u4f7f\u7528\u4e92\u65a5\u9501\u6765\u786e\u4fdd\u540c\u4e00\u65f6\u95f4\u53ea\u80fd\u505c\u653e\u4e00\u8f86\u8f66\u3002<\/p>\n<h3> \u505c\u8f66\u5238 <\/h3>\n<p>\u6bcf\u8f86\u8f66\u90fd\u4f1a\u6536\u5230\u4e00\u5f20\u7968\uff0c\u4e0a\u9762\u6709\u8fdb\u5165\u65f6\u95f4\u3001\u79bb\u5f00\u65f6\u95f4\u3001\u505c\u8f66\u4f4d\u548c\u603b\u8d39\u7528\u3002\u6b64\u7968\u4f1a\u5728\u8f66\u8f86\u9000\u51fa\u65f6\u66f4\u65b0\uff0c\u5e76\u6839\u636e\u505c\u8f66\u65f6\u95f4\u8ba1\u7b97\u8d39\u7528\u3002<\/p>\n<pre>type parkingticket struct {\n    entrytime   time.time\n    exittime    time.time\n    vehicle     vehicles.vehicleinterface\n    spot        *parkingspot\n    totalcharge float64\n}\n\nfunc newparkingticket(vehicle vehicles.vehicleinterface, spot *parkingspot) *parkingticket {\n    return &amp;parkingticket{entrytime: time.now(), exittime: time.time{}, vehicle: vehicle, spot: spot, totalcharge: 0.00}\n}\n<\/pre>\n<p>calculatetotalcharge \u65b9\u6cd5\u6839\u636e\u8f66\u8f86\u7c7b\u578b\u548c\u6301\u7eed\u65f6\u95f4\u8ba1\u7b97\u505c\u8f66\u8d39\u3002<\/p>\n<h3> \u652f\u4ed8\u7cfb\u7edf <\/h3>\n<p>paymentsystem \u7c7b\u5904\u7406\u4ed8\u6b3e\uff0c\u6839\u636e\u662f\u5426\u652f\u4ed8\u6240\u9700\u91d1\u989d\u66f4\u65b0\u4ed8\u6b3e\u72b6\u6001\uff1a<\/p>\n<pre>type paymentsystem struct {\n    status        status\n    amount        float64\n    parkingticket *parkingticket\n}\n\nfunc (p *paymentsystem) processpayment() error {\n    if p.parkingticket == nil {\n        return fmt.errorf(\"payment failed: no parking ticket found\")\n    }\n    if p.parkingticket.totalcharge &lt; p.amount {\n        p.status = paymentstatusfailed\n        return fmt.errorf(\"payment failed: insufficient funds\")\n    }\n\n    p.status = paymentstatuscompleted\n    return nil\n}\n<\/pre>\n<p>processpayment \u51fd\u6570\u68c0\u67e5\u91d1\u989d\u5e76\u5c06\u4ed8\u6b3e\u72b6\u6001\u66f4\u65b0\u4e3a\u201c\u5df2\u5b8c\u6210\u201d\u6216\u201c\u5931\u8d25\u201d\u3002<\/p>\n<h3> \u6dfb\u52a0\u8f66\u8f86\u7c7b\u578b <\/h3>\n<p>\u6211\u4eec\u7684\u7cfb\u7edf\u652f\u6301\u4e0d\u540c\u7c7b\u578b\u7684\u8f66\u8f86\uff08\u6c7d\u8f66\u3001\u8d27\u8f66\u3001\u5361\u8f66\u548c\u6469\u6258\u8f66\uff09\u3002\u6bcf\u79cd\u7c7b\u578b\u7684\u6bcf\u5c0f\u65f6\u8d39\u7528\u4e0d\u540c\u3002\u8fd9\u662f\u901a\u8fc7\u5728\u5355\u72ec\u7684\u8f66\u8f86\u5305\u4e2d\u8bbe\u7f6e vehicletype \u548c vehicleinterface \u6765\u5b9e\u73b0\u7684\uff1a<\/p>\n<pre>package vehicles\n\ntype VehicleType string\n\nconst (\n    CarType        VehicleType = \"Car\"\n    VanType        VehicleType = \"Van\"\n    TruckType      VehicleType = \"Truck\"\n    MotorcycleType VehicleType = \"Motorcycle\"\n)\n\ntype VehicleInterface interface {\n    GetLicenceNumber() string\n    GetVehicleType() VehicleType\n    GetVehicleCost() float64\n}\n<\/pre>\n<p>\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u8c03\u7528newcar\u3001newvan\u3001newtruck\u7b49\u6765\u521b\u5efa\u65b0\u7684\u8f66\u8f86\uff0c\u5b83\u4eec\u90fd\u5b9e\u73b0\u4e86vehicleinterface\u3002<\/p>\n<hr>\n<h2> \u5c06\u4e00\u5207\u6574\u5408\u5728\u4e00\u8d77 <\/h2>\n<p>\u8ba9\u6211\u4eec\u770b\u770b\u5404\u4e2a\u90e8\u5206\u5982\u4f55\u5728\u6d41\u7a0b\u4e2d\u7ec4\u5408\u5728\u4e00\u8d77\uff1a<\/p>\n<ul>\n<li> <strong>\u521b\u5efa\u505c\u8f66\u573a<\/strong>\uff1a\u8c03\u7528 getparkinglotinstance() \u5e76\u4f7f\u7528 addfloor \u6dfb\u52a0\u697c\u5c42\u3002<\/li>\n<li> <strong>\u67e5\u627e\u505c\u8f66\u4f4d\u5e76\u505c\u653e\u8f66\u8f86<\/strong>\uff1aparkvehicle \u65b9\u6cd5\u67e5\u627e\u53ef\u7528\u505c\u8f66\u4f4d\uff0c\u6839\u636e\u8f66\u8f86\u7c7b\u578b\u5bf9\u5176\u8fdb\u884c\u9a8c\u8bc1\uff0c\u5e76\u751f\u6210\u7968\u8bc1\u3002<\/li>\n<li> <strong>unpark vehicle \u5e76\u5904\u7406\u4ed8\u6b3e<\/strong>\uff1aunparkvehicle \u751f\u6210\u603b\u8d39\u7528\uff0c\u542f\u52a8\u652f\u4ed8\u7cfb\u7edf\uff0c\u5e76\u5b8c\u6210\u4ea4\u6613\u3002<\/li>\n<\/ul>\n<hr>\n<p>\u8fd9\u4e2a\u505c\u8f66\u573a\u7cfb\u7edf\u662f\u6784\u5efa\u66f4\u590d\u6742\u7cfb\u7edf\u7684\u7b80\u5316\u8d77\u70b9\u3002\u6211\u4eec\u4ecb\u7ecd\u4e86\u697c\u5c42\u548c\u505c\u8f66\u4f4d\u7ba1\u7406\u3001\u8f66\u8f86\u505c\u8f66\u548c\u51fa\u5e93\u4ee5\u53ca\u57fa\u672c\u4ed8\u6b3e\u6d41\u7a0b\u7684\u57fa\u7840\u77e5\u8bc6\u3002<\/p>\n<p>\u6709\u5173\u5b8c\u6574\u4ee3\u7801\u5b9e\u73b0\uff0c\u8bf7\u68c0\u67e5\u4ee5\u4e0b\u5b58\u50a8\u5e93\uff1a<\/p>\n<h2> <img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241111\/17313215936731def9346cd.jpg\" class=\"aligncenter\"> \u4e3b\u9898\u6811 \/ \u4f4e\u7ea7\u8bbe\u8ba1 golang <\/h2>\n<h3> golang \u4e2d\u7684\u5e95\u5c42\u7cfb\u7edf\u8bbe\u8ba1\u89e3\u51b3\u65b9\u6848 <\/h3>\n<h1>go \u4e2d\u7684\u5e95\u5c42\u7cfb\u7edf\u8bbe\u8ba1 <\/h1>\n<p>\u6b22\u8fce\u6765\u5230<strong>go \u4e2d\u7684\u4f4e\u7ea7\u7cfb\u7edf\u8bbe\u8ba1<\/strong>\u5b58\u50a8\u5e93\uff01\u8be5\u5b58\u50a8\u5e93\u5305\u542b\u5404\u79cd\u4f4e\u7ea7\u7cfb\u7edf\u8bbe\u8ba1\u95ee\u9898\u53ca\u5176\u5728 go 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