{"id":207387,"date":"2025-07-08T11:27:51","date_gmt":"2025-07-08T03:27:51","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207387\/"},"modified":"2025-07-08T11:27:51","modified_gmt":"2025-07-08T03:27:51","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8%e5%85%b6%e4%b8%ad%e4%b8%80%e4%b8%aa%e6%96%b9%e6%b3%95%e8%bf%94%e5%9b%9e%e5%90%8c%e4%b8%80%e6%8e%a5%e5%8f%a3%e7%9a%84%e5%af%b9%e8%b1%a1%e7%9a%84%e6%8e%a5%e5%8f%a3","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207387\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528\u5176\u4e2d\u4e00\u4e2a\u65b9\u6cd5\u8fd4\u56de\u540c\u4e00\u63a5\u53e3\u7684\u5bf9\u8c61\u7684\u63a5\u53e3\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u5982\u4f55\u4f7f\u7528\u5176\u4e2d\u4e00\u4e2a\u65b9\u6cd5\u8fd4\u56de\u540c\u4e00\u63a5\u53e3\u7684\u5bf9\u8c61\u7684\u63a5\u53e3\uff1f<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-22 09:18:34<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u5728Golang\u5b9e\u6218\u5f00\u53d1\u7684\u8fc7\u7a0b\u4e2d\uff0c\u6211\u4eec\u7ecf\u5e38\u4f1a\u9047\u5230\u4e00\u4e9b\u8fd9\u6837\u90a3\u6837\u7684\u95ee\u9898\uff0c\u7136\u540e\u8981\u5361\u597d\u534a\u5929\uff0c\u7b49\u95ee\u9898\u89e3\u51b3\u4e86\u624d\u53d1\u73b0\u539f\u6765\u4e00\u4e9b\u7ec6\u8282\u77e5\u8bc6\u70b9\u8fd8\u662f\u6ca1\u6709\u638c\u63e1\u597d\u3002\u4eca\u5929\u5c31\u6574\u7406\u5206\u4eab\u300a\u5982\u4f55\u4f7f\u7528\u5176\u4e2d\u4e00\u4e2a\u65b9\u6cd5\u8fd4\u56de\u540c\u4e00\u63a5\u53e3\u7684\u5bf9\u8c61\u7684\u63a5\u53e3\uff1f\u300b\uff0c\u804a\u804a\uff0c\u5e0c\u671b\u53ef\u4ee5\u5e2e\u52a9\u5230\u6b63\u5728\u52aa\u529b\u8d5a\u94b1\u7684\u4f60\u3002<\/p>\n

\u95ee\u9898\u5185\u5bb9
\n <\/p>\n

\u6211\u4ecd\u7136\u5bf9 go \u4e2d\u7684\u63a5\u53e3\u5f88\u611f\u5174\u8da3\uff0c\u4f46\u6211\u6b63\u5728\u7f16\u5199\u4e00\u4e2a\u5305\uff0c\u5b83\u5c06\u83b7\u53d6\u7ed3\u6784\u56fe\u5e76\u5c06\u5b83\u4eec\u4f5c\u4e3a\u6811\u6253\u5370\u5230 stdout\u3002\u4e3a\u6b64\uff0c\u6211\u5b9a\u4e49\u4e86\u4e00\u4e2a\u540d\u4e3a treenode<\/code> \u7684 interface<\/code>\uff0c\u5176\u4e2d\u5305\u542b\u4e00\u4e2a\u65b9\u6cd5 getchildren<\/code>\uff0c\u8be5\u65b9\u6cd5\u9700\u8981\u8fd4\u56de\u4e00\u4e2a\u5b9e\u73b0 treenode<\/code> \u7684\u7ed3\u6784\u5207\u7247\u3002\u8fd9\u6837\u6211\u5c31\u53ef\u4ee5\u4ece\u6839\u5f00\u59cb\u9012\u5f52\u6811\u3002\u5373\uff0c\u8fd9\u662f\u5b8c\u6574\u7684\u63a5\u53e3\u5b9a\u4e49\uff1a<\/p>\n

type treenode interface {\n    getname() string\n    getchildren() []treenode\n}\n<\/pre>\n
\u6211\u542c\u8bf4\u201c\u63a5\u53d7\u63a5\u53e3\u5e76\u8fd4\u56de\u7ed3\u6784\u201d\u662f\u6700\u4f73\u5b9e\u8df5\u3002\u8fd9\u5f88\u6709\u610f\u4e49\u3002\u4f46\u662f\uff0c\u5f53\u6211\u5c1d\u8bd5\u5728 struct<\/code> \u4e0a\u5b9e\u73b0\u8fd9\u4e9b\u65b9\u6cd5\u65f6\uff0c\u6211\u5f00\u59cb\u9047\u5230\u95ee\u9898\u3002\u8fd9\u662f\u4e00\u4e2a\u5b8c\u6574\u7684\u793a\u4f8b\uff1a<\/p>\n
package main\n\nimport \"fmt\"\n\ntype mystruct struct {\n    name     string\n    children []*mystruct\n}\n\ntype treenode interface {\n    getname() string\n    getchildren() []treenode\n}\n\nfunc printtree(root treenode) {\n    \/\/ print the nodes recursively\n    fmt.println(root.getname())\n    \/\/ etc.\n}\n\nfunc main() {\n    child1 := &mystruct{\n        name: \"child 1\",\n    }\n    child2 := &mystruct{\n        name: \"child 2\",\n    }\n    root := &mystruct{\n        name:     \"root\",\n        children: []*mystruct{child1, child2},\n    }\n    printtree(root)\n}\n\nfunc (my_struct *mystruct) getname() string {\n    return my_struct.name\n}\n\nfunc (my_struct *mystruct) getchildren() []*mystruct {\n    return my_struct.children\n}\n\n<\/pre>\n
\u5728 main<\/code> \u4e2d\u5bf9 printtree<\/code> \u7684\u8c03\u7528\u4e2d\uff0c\u7f16\u8bd1\u5668\u62b1\u6028<\/p>\n
cannot use root (type *mystruct) as type treenode in argument to printtree:\n    *mystruct does not implement treenode (wrong type for getchildren method)\n        have getchildren() []*mystruct\n        want getchildren() []treenode<\/pre>\n
\u8fd9\u6709\u70b9\u4ee4\u4eba\u60ca\u8bb6\uff0c\u56e0\u4e3a\u63a5\u53e3\u8868\u793a getchildren()<\/code> \u5e94\u8be5\u8fd4\u56de\u5b9e\u73b0 treenode<\/code> \u7684\u5bf9\u8c61\uff0c\u800c *mystruct<\/code> \u786e\u5b9e<\/em>\u5b9e\u73b0 treenode<\/code>\u3002\u4f46\u663e\u7136\uff0c\u5173\u4e8e\u7f16\u8bd1\u5668\u5982\u4f55\u5904\u7406\u8fd9\u79cd\u60c5\u51b5\uff08\u9700\u8981\u9012\u5f52\u5730\u9700\u8981\u63a5\u53e3\u7c7b\u578b\uff09\uff0c\u6211\u663e\u7136\u7f3a\u5c11\u4e00\u4e9b\u4e1c\u897f\u3002<\/p>\n
\u5982\u679c\u6211\u63a5\u53d7\u7f16\u8bd1\u5668\u7684\u5efa\u8bae\uff08\u4ee5\u53ca\u8fd9\u4e2a\u7c7b\u4f3c\u95ee\u9898\u7684\u5efa\u8bae\uff09\u5e76\u66f4\u6539 getchildren<\/code> \u7684 getchildren<\/code> \u5b9e\u73b0\u4ee5\u8fd4\u56de []treenode<\/code> \u6211\u4f1a\u5728 getchildren()<\/code> \u5b9e\u73b0\u4e2d\u6536\u5230\u4e00\u4e2a\u65b0\u7684\u7f16\u8bd1\u5668\u9519\u8bef<\/p>\n
cannot use my_struct.Children (type []*MyStruct) as type []TreeNode in return argument<\/pre>\n
\u8fd9\u4e5f\u662f\u4e00\u4e2a\u60ca\u559c\u3002\u53e6\u5916\uff0c\u5171\u8bc6\u4f3c\u4e4e\u662f\u6211\u5e94\u8be5\u4ece\u65b9\u6cd5\u8fd4\u56de struct<\/code>s\uff0c\u800c\u4e0d\u662f\u8fd4\u56de interface<\/code>s\u3002\u6211\u7edd\u5bf9\u53ef\u4ee5\u63a5\u53d7\u4ece\u8be5\u65b9\u6cd5\u8fd4\u56de []treenode<\/code> \uff0c\u4f46\u6211\u4e00\u5b9a\u5ffd\u7565\u4e86\u4e00\u4e9b\u4e1c\u897f\uff0c\u56e0\u4e3a\u7f16\u8bd1\u5668\u4e0d\u9ad8\u5174\u3002<\/p>\n
go\u7248\u672c\uff1ago\u7248\u672cgo1.13.8 darwin\/amd64<\/code><\/p>\n
 <\/p>\n
\u89e3\u51b3\u65b9\u6848<\/h2>\n
 <\/p>\n
\u201c\u63a5\u53d7\u63a5\u53e3\uff0c\u8fd4\u56de\u7ed3\u6784\u201d\u4e0d\u662f\u4e00\u6761\u89c4\u5219\uff0c\u800c\u662f\u4e00\u79cd\u8ba9\u751f\u6d3b\u66f4\u8f7b\u677e\u7684\u5b9e\u8df5\u3002\u4f46\u662f\uff0c\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5bf9\u4e8e\u60a8\u7684\u63a5\u53e3\u5b9a\u4e49\uff0c\u60a8\u6ca1\u6709\u592a\u591a\u9009\u62e9\u3002<\/p>\n
\u60a8\u53ef\u4ee5\u4fdd\u7559\u60a8\u7684\u8bbe\u8ba1\uff0c\u4f46\u5b9e\u73b0 getchildren\uff1a<\/p>\n
func (my_struct *mystruct) getchildren() []treenode {\n    ret:=make([]treenode,0,len(my_struct.children))\n    for _,x:=range my_struct.children {\n        ret=append(ret,x)\n    }\n    return ret\n}<\/pre>\n
\u7531\u4e8e go \u7c7b\u578b\u7cfb\u7edf\u7684\u4e25\u683c\u6027\u8d28\uff0c\u8fd9\u662f\u5fc5\u9700\u7684\u3002<\/p>\n
\u6216\u8005\uff0c\u60a8\u53ef\u4ee5\u7a0d\u5fae\u4fee\u6539\u4e00\u4e0b\u60a8\u7684\u8bbe\u8ba1\uff1a<\/p>\n
type MyStruct struct {\n    Name     string\n    Children []TreeNode\n}<\/pre>\n
\u5982\u679c\u60a8\u5728\u4f7f\u7528 children<\/code> \u65f6\u9700\u8981\u8bbf\u95ee\u5e95\u5c42\u7ed3\u6784\uff0c\u5219\u9700\u8981\u4f7f\u7528\u7c7b\u578b\u65ad\u8a00\u3002\u4f46\u662f\uff0c\u5b83\u53ef\u4ee5\u8ba9\u60a8\u6784\u5efa\u5177\u6709\u4e0d\u540c\u7c7b\u578b\u8282\u70b9\u7684\u6811\u3002<\/p>\n
\u4eca\u5929\u5173\u4e8e\u300a\u5982\u4f55\u4f7f\u7528\u5176\u4e2d\u4e00\u4e2a\u65b9\u6cd5\u8fd4\u56de\u540c\u4e00\u63a5\u53e3\u7684\u5bf9\u8c61\u7684\u63a5\u53e3\uff1f\u300b\u7684\u5185\u5bb9\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\uff0c\u5982\u679c\u6709\u4ec0\u4e48\u7591\u95ee\u6216\u8005\u5efa\u8bae\uff0c\u53ef\u4ee5\u5728\u516c\u4f17\u53f7\u4e0b\u591a\u591a\u56de\u590d\u4ea4\u6d41\uff1b\u6587\u4e2d\u82e5\u6709\u4e0d\u6b63\u4e4b\u5904\uff0c\u4e5f\u5e0c\u671b\u56de\u590d\u7559\u8a00\u4ee5\u544a\u77e5\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5f53\u524d\u4f4d\u7f6e\uff1a > > ...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-207387","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207387","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=207387"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207387\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207387"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207387"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207387"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}