{"id":47342,"date":"2025-07-30T07:27:23","date_gmt":"2025-07-29T23:27:23","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/47342.html"},"modified":"2025-07-30T07:27:23","modified_gmt":"2025-07-29T23:27:23","slug":"%e3%80%90%e6%95%b0%e6%8d%ae%e7%bb%93%e6%9e%84%e5%88%9d%e9%98%b6%e3%80%91-%e4%ba%8c%e5%8f%89%e6%a0%91%e5%9b%9b","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/47342.html","title":{"rendered":"\u3010\u6570\u636e\u7ed3\u6784\u521d\u9636\u3011--\u4e8c\u53c9\u6811(\u56db)"},"content":{"rendered":"<p class=\"img-center\"><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"92\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/07\/20250729232716-688958d456935.jpg\" width=\"92\" \/><\/p>\n<p class=\"img-center\"><img decoding=\"async\" alt=\"\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/07\/20250729232716-688958d4cff8e.gif\" \/><\/p>\n<p>\u00a0&#x1f525;\u4e2a\u4eba\u4e3b\u9875&#xff1a;&#064;\u8349\u8393\u718aLotso<\/p>\n<p>&#x1f3ac;\u4f5c\u8005\u7b80\u4ecb&#xff1a;<span style=\"color:#be191c\">C&#043;&#043;\u7814\u53d1\u65b9\u5411\u5b66\u4e60\u8005<\/span><\/p>\n<p>&#x1f4d6;\u4e2a\u4eba\u4e13\u680f&#xff1a;\u00a0\u300aC\u8bed\u8a00\u300b\u00a0\u300a\u6570\u636e\u7ed3\u6784\u4e0e\u7b97\u6cd5\u300b\u300aC\u8bed\u8a00\u5237\u9898\u96c6\u300b\u300aLeetcode\u5237\u9898\u6307\u5357\u300b<\/p>\n<p>\u2b50\ufe0f\u4eba\u751f\u683c\u8a00&#xff1a;<span style=\"color:#be191c\">\u751f\u6d3b\u662f\u9ed8\u9ed8\u7684\u575a\u6301&#xff0c;\u6bc5\u529b\u662f\u6c38\u4e45\u7684\u4eab\u53d7\u3002<\/span><\/p>\n<p><span style=\"color:#fe2c24\">\u524d\u8a00&#xff1a;\u5728\u524d\u9762\u6211\u4eec\u7ed3\u675f\u4e86\u5b9e\u73b0\u987a\u5e8f\u7ed3\u6784\u7684\u4e8c\u53c9\u6811\u4ee5\u53caTop-K\u95ee\u9898\u7684\u89e3\u51b3\u3002\u90a3\u4e48\u63a5\u4e0b\u6765\u5c31\u662f\u5b9e\u73b0\u94fe\u5f0f\u7ed3\u6784\u4e8c\u53c9\u6811&#xff0c;\u94fe\u63a5\u7ed3\u6784\u7684\u4e8c\u53c9\u6811&#xff0c;\u6ca1\u6709\u5b8c\u5168\u4e8c\u53c9\u6811\u548c\u5806\u90a3\u6837\u7684\u6027\u8d28&#xff0c;\u6240\u4ee5\u6211\u4eec\u540e\u7eed\u5b9e\u73b0\u7684\u63a5\u53e3\u4e5f\u4e0d\u4f1a\u6d89\u53ca\u63d2\u5165\u5220\u9664\u7b49\u64cd\u4f5c&#xff0c;\u4e3b\u8981\u662f\u524d\u4e2d\u540e\u5e8f\u904d\u5386\u4ee5\u53ca\u5176\u5b83\u7684\u4e00\u4e9b\u4e8c\u53c9\u6811\u5e38\u7528\u65b9\u5f0f\u7684\u5b9e\u73b0\u3002\u00a0<\/span><\/p>\n<hr \/>\n<p id=\"main-toc\">\u76ee\u5f55<\/p>\n<p id=\"%E4%B8%80.%E5%88%9B%E5%BB%BA%E9%93%BE%E5%BC%8F%E7%BB%93%E6%9E%84%E4%BA%8C%E5%8F%89%E6%A0%91-toc\" style=\"margin-left:0px\">\u4e00.\u521b\u5efa\u94fe\u5f0f\u7ed3\u6784\u4e8c\u53c9\u6811<\/p>\n<p id=\"%E4%BA%8C.%E5%89%8D%E4%B8%AD%E5%90%8E%E5%BA%8F%E9%81%8D%E5%8E%86-toc\" style=\"margin-left:0px\">\u4e8c.\u524d\u4e2d\u540e\u5e8f\u904d\u5386<\/p>\n<p id=\"%E5%89%8D%E5%BA%8F%E9%81%8D%E5%8E%86%EF%BC%9A-toc\" style=\"margin-left:40px\">\u524d\u5e8f\u904d\u5386&#xff1a;<\/p>\n<p id=\"%C2%A0%E4%BB%A3%E7%A0%81%E5%AE%9E%E7%8E%B0%EF%BC%9A-toc\" style=\"margin-left:80px\">\u00a0\u4ee3\u7801\u5b9e\u73b0&#xff1a;<\/p>\n<p id=\"%C2%A0%E5%87%BD%E6%95%B0%E9%80%92%E5%BD%92%E6%A0%88%E6%A0%88%E5%9B%BE%EF%BC%9A(%E6%A0%87%E7%9A%84%E5%BA%8F%E5%8F%B7%E8%A1%A8%E7%A4%BA%E6%89%93%E5%8D%B0%E7%9A%84%E9%A1%BA%E5%BA%8F)-toc\" style=\"margin-left:80px\">\u00a0\u51fd\u6570\u9012\u5f52\u6808\u6808\u56fe&#xff1a;(\u6807\u7684\u5e8f\u53f7\u8868\u793a\u6253\u5370\u7684\u987a\u5e8f)<\/p>\n<p id=\"%E5%89%8D%E5%BA%8F%E9%81%8D%E5%8E%86%E7%BB%93%E6%9E%9C(%E5%BF%BD%E7%95%A5NULL)%EF%BC%9A-toc\" style=\"margin-left:80px\">\u524d\u5e8f\u904d\u5386\u7ed3\u679c(\u5ffd\u7565NULL)&#xff1a;<\/p>\n<p id=\"%C2%A0%E4%B8%AD%E5%BA%8F%E9%81%8D%E5%8E%86%EF%BC%9A-toc\" style=\"margin-left:40px\">\u00a0\u4e2d\u5e8f\u904d\u5386&#xff1a;<\/p>\n<p id=\"%C2%A0%E4%BB%A3%E7%A0%81%E5%AE%9E%E7%8E%B0%EF%BC%9A-toc\" style=\"margin-left:80px\">\u00a0\u4ee3\u7801\u5b9e\u73b0&#xff1a;<\/p>\n<p id=\"%C2%A0%E5%87%BD%E6%95%B0%E6%A0%88%E5%B8%A7%E9%80%92%E5%BD%92%E5%9B%BE%EF%BC%9A(%E6%A0%87%E7%9A%84%E5%BA%8F%E5%8F%B7%E8%A1%A8%E7%A4%BA%E6%89%93%E5%8D%B0%E7%9A%84%E9%A1%BA%E5%BA%8F)-toc\" style=\"margin-left:80px\">\u00a0\u51fd\u6570\u6808\u5e27\u9012\u5f52\u56fe&#xff1a;(\u6807\u7684\u5e8f\u53f7\u8868\u793a\u6253\u5370\u7684\u987a\u5e8f)<\/p>\n<p id=\"%C2%A0%E4%B8%AD%E5%BA%8F%E9%81%8D%E5%8E%86%E7%BB%93%E6%9E%9C(%E5%BF%BD%E7%95%A5NULL)%EF%BC%9A-toc\" style=\"margin-left:80px\">\u00a0\u4e2d\u5e8f\u904d\u5386\u7ed3\u679c(\u5ffd\u7565NULL)&#xff1a;<\/p>\n<p id=\"%E5%90%8E%E5%BA%8F%E9%81%8D%E5%8E%86%EF%BC%9A%C2%A0-toc\" style=\"margin-left:40px\">\u540e\u5e8f\u904d\u5386&#xff1a;\u00a0<\/p>\n<p id=\"%E4%BB%A3%E7%A0%81%E5%AE%9E%E7%8E%B0%EF%BC%9A%C2%A0-toc\" style=\"margin-left:80px\">\u4ee3\u7801\u5b9e\u73b0&#xff1a;\u00a0<\/p>\n<p id=\"%E5%87%BD%E6%95%B0%E9%80%92%E5%BD%92%E6%A0%88%E5%B8%A7%E5%9B%BE%EF%BC%9A%C2%A0(%E6%A0%87%E7%9A%84%E5%BA%8F%E5%8F%B7%E8%A1%A8%E7%A4%BA%E6%89%93%E5%8D%B0%E7%9A%84%E9%A1%BA%E5%BA%8F)-toc\" style=\"margin-left:80px\">\u51fd\u6570\u9012\u5f52\u6808\u5e27\u56fe&#xff1a;\u00a0(\u6807\u7684\u5e8f\u53f7\u8868\u793a\u6253\u5370\u7684\u987a\u5e8f)<\/p>\n<p id=\"%E5%90%8E%E5%BA%8F%E9%81%8D%E5%8E%86%E7%BB%93%E6%9E%9C(%E5%BF%BD%E7%95%A5NULL)%EF%BC%9A-toc\" style=\"margin-left:80px\">\u540e\u5e8f\u904d\u5386\u7ed3\u679c(\u5ffd\u7565NULL)&#xff1a;<\/p>\n<p id=\"%E4%B8%89.%E4%BB%A3%E7%A0%81%E5%B1%95%E7%8E%B0%C2%A0-toc\" style=\"margin-left:0px\">\u4e09.\u4ee3\u7801\u5c55\u73b0\u00a0<\/p>\n<p id=\"Tree.h%EF%BC%9A-toc\" style=\"margin-left:40px\">Tree.h&#xff1a;<\/p>\n<p id=\"Tree.c%EF%BC%9A-toc\" style=\"margin-left:40px\">Tree.c&#xff1a;<\/p>\n<p id=\"test.c%EF%BC%9A-toc\" style=\"margin-left:40px\">test.c&#xff1a;<\/p>\n<p id=\"-toc\" style=\"margin-left:40px\">\n<hr id=\"hr-toc\" \/>\n<h2 id=\"%E4%B8%80.%E5%88%9B%E5%BB%BA%E9%93%BE%E5%BC%8F%E7%BB%93%E6%9E%84%E4%BA%8C%E5%8F%89%E6%A0%91\">\u4e00.\u521b\u5efa\u94fe\u5f0f\u7ed3\u6784\u4e8c\u53c9\u6811<\/h2>\n<p>&#8211;\u7528<span style=\"color:#1f2329\">\u94fe\u8868\u6765\u8868\u793a\u2f00\u68f5\u4e8c\u53c9\u6811&#xff0c;\u5373\u7528\u94fe\u6765\u6307\u793a\u5143\u7d20\u7684\u903b\u8f91\u5173\u7cfb\u3002 \u901a\u5e38\u7684\u65b9\u6cd5\u662f\u94fe\u8868\u4e2d\u6bcf\u4e2a\u7ed3\u70b9\u7531\u4e09\u4e2a\u57df\u7ec4\u6210&#xff0c;\u6570\u636e\u57df\u548c\u5de6\u53f3\u6307\u9488\u57df&#xff0c;\u5de6\u53f3\u6307\u9488\u5206\u522b\u7528\u6765\u7ed9\u51fa\u8be5\u7ed3\u70b9\u5de6\u5b69\u5b50\u548c\u53f3\u5b69\u5b50\u6240\u5728\u7684\u94fe\u7ed3\u70b9\u7684\u5b58\u50a8\u5730\u5740 &#xff0c;\u5176\u7ed3\u6784\u5982\u4e0b&#xff1a;(\u6211\u4eec\u6570\u636e\u7c7b\u578b\u8fd9\u6b21\u7528\u7684char)<\/span><\/p>\n<p>typedef char BTDataType;<br \/>\ntypedef struct BinaryNode<br \/>\n{<br \/>\nBTDataType data;<br \/>\nstruct BinaryNode* left;\/\/\u5de6\u5b69\u5b50<br \/>\nstruct BinaryNode* right;\/\/\u53f3\u5b69\u5b50<br \/>\n}BTNode; <\/p>\n<p>\u6211\u4eec\u4e3a\u4e86\u65b9\u4fbf\u540e\u7eed\u7684\u4f7f\u7528&#xff0c;\u5148\u624b\u52a8\u521b\u5efa\u4e00\u9897\u94fe\u5f0f\u4e8c\u53c9\u6811&#xff1a;<\/p>\n<p>BTNode* buyNode(char x)<br \/>\n{<br \/>\nBTNode* newnode &#061; (BTNode*)malloc(sizeof(BTNode));<br \/>\nnewnode-&gt;data &#061; x;<br \/>\nnewnode-&gt;left &#061; newnode-&gt;right &#061; NULL;<br \/>\nreturn newnode;<br \/>\n}<br \/>\nvoid test1()<br \/>\n{<br \/>\nBTNode* nodeA &#061; buyNode(&#039;A&#039;);<br \/>\nBTNode* nodeB &#061; buyNode(&#039;B&#039;);<br \/>\nBTNode* nodeC &#061; buyNode(&#039;C&#039;);<br \/>\nBTNode* nodeD &#061; buyNode(&#039;D&#039;);<br \/>\nBTNode* nodeE &#061; buyNode(&#039;E&#039;);<br \/>\nBTNode* nodeF &#061; buyNode(&#039;F&#039;);<\/p>\n<p>nodeA-&gt;left &#061; nodeB;<br \/>\nnodeA-&gt;right &#061; nodeC;<br \/>\nnodeB-&gt;left &#061; nodeD;<br \/>\nnodeC-&gt;left &#061; nodeE;<br \/>\nnodeC-&gt;right &#061; nodeF;<br \/>\n} <\/p>\n<p>\u00a0\u521b\u5efa\u51fa\u6765\u7684\u6811\u5982\u56fe\u6240\u793a&#xff1a;<img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"1125\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/07\/20250729232716-688958d4dac71.png\" width=\"1578\" \/><\/p>\n<hr \/>\n<h2 id=\"%E4%BA%8C.%E5%89%8D%E4%B8%AD%E5%90%8E%E5%BA%8F%E9%81%8D%E5%8E%86\">\u4e8c.\u524d\u4e2d\u540e\u5e8f\u904d\u5386<\/h2>\n<p>&#8211;\u4e8c\u53c9\u6811\u7684\u64cd\u4f5c\u904d\u5386\u662f\u5fc5\u4e0d\u53ef\u5c11\u7684&#xff0c;\u6211\u4eec\u5148\u6765\u770b\u770b\u8fd9\u4e9b\u904d\u5386\u7684\u904d\u5386\u89c4\u5219\u5427<\/p>\n<p>\u6309\u7167\u89c4\u5219&#xff0c;\u4e8c\u53c9\u6811\u7684\u904d\u5386\u6709&#xff1a;\u524d\u5e8f\/\u4e2d\u5e8f\/\u540e\u5e8f\u7684\u9012\u5f52\u7ed3\u6784\u904d\u5386&#xff1a;<\/p>\n<ul>\n<li>\u524d\u5e8f\u904d\u5386(\u5148\u6839\u904d\u5386)&#xff1a;\u5148\u904d\u5386\u6839\u8282\u70b9&#xff0c;\u518d\u904d\u5386\u5de6\u5b50\u6811&#xff0c;\u6700\u540e\u904d\u5386\u53f3\u5b50\u6811&#8212;-<span style=\"color:#be191c\">\u6839\u5de6\u53f3<\/span><\/li>\n<li>\u4e2d\u5e8f\u904d\u5386&#xff1a;\u5148\u904d\u5386\u5de6\u5b50\u6811&#xff0c;\u518d\u904d\u5386\u6839\u8282\u70b9&#xff0c;\u6700\u540e\u904d\u5386\u53f3\u5b50\u6811&#8212;-<span style=\"color:#be191c\">\u5de6\u6839\u53f3<\/span><\/li>\n<li>\u540e\u7eed\u904d\u5386&#xff1a;\u5148\u904d\u5386\u5de6\u5b50\u6811&#xff0c;\u518d\u904d\u5386\u53f3\u5b50\u6811&#xff0c;\u6700\u540e\u904d\u5386\u6839\u8282\u70b9&#8212;-<span style=\"color:#be191c\">\u5de6\u53f3\u6839<\/span><\/li>\n<\/ul>\n<p>\u5c31\u62ff\u6211\u4eec\u521b\u5efa\u7684\u8fd9\u4e2a\u6811\u4e3a\u4f8b&#xff0c;\u90a3\u4e48\u5b83\u7684\u524d\u4e2d\u540e\u904d\u5386\u7ed3\u679c\u548c\u4ee3\u7801\u5b9e\u73b0\u662f\u600e\u6837\u7684\u5462&#xff0c;\u6211\u4eec\u4e00\u8d77\u63a5\u7740\u5f80\u4e0b\u770b<\/p>\n<h3 id=\"%E5%89%8D%E5%BA%8F%E9%81%8D%E5%8E%86%EF%BC%9A\">\u524d\u5e8f\u904d\u5386&#xff1a;<\/h3>\n<ul>\n<li>\u8bbf\u95ee\u987a\u5e8f&#xff1a;\u6839\u8282\u70b9&#xff0c;\u5de6\u5b50\u6811&#xff0c;\u53f3\u5b50\u6811<\/li>\n<\/ul>\n<h4 id=\"%C2%A0%E4%BB%A3%E7%A0%81%E5%AE%9E%E7%8E%B0%EF%BC%9A\">\u00a0\u4ee3\u7801\u5b9e\u73b0&#xff1a;<\/h4>\n<p>\/\/\u524d\u5e8f\u904d\u5386<br \/>\nvoid PreOrder(BTNode* root)<br \/>\n{<br \/>\nif (root &#061;&#061; NULL)<br \/>\n{<br \/>\nprintf(&#034;NULL &#034;);<br \/>\nreturn;<br \/>\n}<br \/>\n\/\/\u6839\u5de6\u53f3<br \/>\nprintf(&#034;%c &#034;, root-&gt;data);<br \/>\nPreOrder(root-&gt;left);<br \/>\nPreOrder(root-&gt;right);<br \/>\n}<\/p>\n<p>\u8fd9\u4efd\u4ee3\u7801\u662f\u4e0d\u662f\u770b\u8d77\u6765\u7279\u522b\u7b80\u5355&#xff0c;\u8fd9\u91cc\u5c31\u662f\u5229\u7528\u4e86\u9012\u5f52\u7684\u601d\u60f3&#xff0c;\u4e3a\u7a7a\u5c31\u6253\u5370NULL\u5e76\u8fd4\u56de\u3002\u5927\u5bb6\u4e00\u5b9a\u8981\u53bb\u4ed4\u7ec6\u4f53\u4f1a\u4e00\u4e0b\u9012\u5f52\u7684\u8fc7\u7a0b&#xff0c;\u6700\u597d\u628a\u51fd\u6570\u9012\u5f52\u7684\u6808\u5e27\u56fe\u7ed9\u753b\u51fa\u6765\u7406\u89e3\u3002\u5927\u5bb6\u53ef\u4ee5\u5148\u770b\u4e00\u4e0b\u6211\u753b\u7684\u4e24\u4e2a\u56fe\u3002\u00a0<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"986\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/07\/20250729232717-688958d5a5754.png\" width=\"1651\" \/>\u00a0\u8fd9\u91cc\u7ea2\u7ebf\u7edf\u4e00\u8868\u793a\u9012\u5f52&#xff0c;\u53e6\u4e00\u4e2a\u8868\u793a\u56de\u9000<\/p>\n<h4 id=\"%C2%A0%E5%87%BD%E6%95%B0%E9%80%92%E5%BD%92%E6%A0%88%E6%A0%88%E5%9B%BE%EF%BC%9A(%E6%A0%87%E7%9A%84%E5%BA%8F%E5%8F%B7%E8%A1%A8%E7%A4%BA%E6%89%93%E5%8D%B0%E7%9A%84%E9%A1%BA%E5%BA%8F)\">\u00a0\u51fd\u6570\u9012\u5f52\u6808\u6808\u56fe&#xff1a;(\u6807\u7684\u5e8f\u53f7\u8868\u793a\u6253\u5370\u7684\u987a\u5e8f)<\/h4>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"1227\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/07\/20250729232718-688958d6580b4.png\" width=\"1689\" \/><\/p>\n<h4 id=\"%E5%89%8D%E5%BA%8F%E9%81%8D%E5%8E%86%E7%BB%93%E6%9E%9C(%E5%BF%BD%E7%95%A5NULL)%EF%BC%9A\">\u524d\u5e8f\u904d\u5386\u7ed3\u679c(\u5ffd\u7565NULL)&#xff1a;<\/h4>\n<ul>\n<li>A B D C E F<\/li>\n<\/ul>\n<h3 id=\"%C2%A0%E4%B8%AD%E5%BA%8F%E9%81%8D%E5%8E%86%EF%BC%9A\">\u00a0\u4e2d\u5e8f\u904d\u5386&#xff1a;<\/h3>\n<ul>\n<li>\u8bbf\u95ee\u987a\u5e8f&#xff1a;\u5de6\u5b50\u6811&#xff0c;\u6839\u8282\u70b9&#xff0c;\u53f3\u5b50\u6811<\/li>\n<\/ul>\n<h4 id=\"%C2%A0%E4%BB%A3%E7%A0%81%E5%AE%9E%E7%8E%B0%EF%BC%9A\">\u00a0\u4ee3\u7801\u5b9e\u73b0&#xff1a;<\/h4>\n<p>\/\/\u4e2d\u5e8f\u904d\u5386<br \/>\nvoid InOrder(BTNode* root)<br \/>\n{<br \/>\nif (root &#061;&#061; NULL)<br \/>\n{<br \/>\nprintf(&#034;NULL &#034;);<br \/>\nreturn;<br \/>\n}<\/p>\n<p>\/\/\u5de6\u6839\u53f3<br \/>\nInOrder(root-&gt;left);<br \/>\nprintf(&#034;%c &#034;, root-&gt;data);<br \/>\nInOrder(root-&gt;right);<br \/>\n}<\/p>\n<p>\u8fd9\u91cc\u7684\u4e2d\u5e8f\u904d\u5386\u4ee3\u7801\u4e5f\u90fd\u5f88\u7b80\u5355&#xff0c;\u6ce8\u610f\u987a\u5e8f\u5c31\u597d\u4e86\u3002\u6211\u4eec\u8fd8\u662f\u548c\u4e0a\u9762\u7684\u4e00\u6837&#xff0c;\u901a\u8fc7\u753b\u56fe\u7406\u6e05\u5b83\u7684\u9012\u5f52\u903b\u8f91\u00a0<\/p>\n<p>\u00a0<img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"313\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/07\/20250729232719-688958d7437c4.png\" width=\"1175\" \/><\/p>\n<h4 id=\"%C2%A0%E5%87%BD%E6%95%B0%E6%A0%88%E5%B8%A7%E9%80%92%E5%BD%92%E5%9B%BE%EF%BC%9A(%E6%A0%87%E7%9A%84%E5%BA%8F%E5%8F%B7%E8%A1%A8%E7%A4%BA%E6%89%93%E5%8D%B0%E7%9A%84%E9%A1%BA%E5%BA%8F)\">\u00a0\u51fd\u6570\u6808\u5e27\u9012\u5f52\u56fe&#xff1a;(\u6807\u7684\u5e8f\u53f7\u8868\u793a\u6253\u5370\u7684\u987a\u5e8f)<\/h4>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"1212\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/07\/20250729232719-688958d76861a.png\" width=\"1592\" \/><\/p>\n<h4 id=\"%C2%A0%E4%B8%AD%E5%BA%8F%E9%81%8D%E5%8E%86%E7%BB%93%E6%9E%9C(%E5%BF%BD%E7%95%A5NULL)%EF%BC%9A\">\u00a0\u4e2d\u5e8f\u904d\u5386\u7ed3\u679c(\u5ffd\u7565NULL)&#xff1a;<\/h4>\n<ul>\n<li>D B A E C F<\/li>\n<\/ul>\n<h3 id=\"%E5%90%8E%E5%BA%8F%E9%81%8D%E5%8E%86%EF%BC%9A%C2%A0\">\u540e\u5e8f\u904d\u5386&#xff1a;\u00a0<\/h3>\n<ul>\n<li>\u8bbf\u95ee\u987a\u5e8f&#xff1a;\u5de6\u5b50\u6811&#xff0c;\u53f3\u5b50\u6811&#xff0c;\u6839\u8282\u70b9<\/li>\n<\/ul>\n<h4 id=\"%E4%BB%A3%E7%A0%81%E5%AE%9E%E7%8E%B0%EF%BC%9A%C2%A0\">\u4ee3\u7801\u5b9e\u73b0&#xff1a;\u00a0<\/h4>\n<p>\/\/\u540e\u7eed\u904d\u5386<br \/>\nvoid PostOrder(BTNode* root)<br \/>\n{<br \/>\nif (root &#061;&#061; NULL)<br \/>\n{<br \/>\nprintf(&#034;NULL &#034;);<br \/>\nreturn;<br \/>\n}<\/p>\n<p>\/\/\u5de6\u53f3\u6839<br \/>\nPostOrder(root-&gt;left);<br \/>\nPostOrder(root-&gt;right);<br \/>\nprintf(&#034;%c &#034;, root-&gt;data);<br \/>\n} <\/p>\n<p>\u540e\u5e8f\u904d\u5386\u7684\u4ee3\u7801\u4e5f\u5f88\u7b80\u5355&#xff0c;\u548c\u524d\u9762\u4e24\u79cd\u4e00\u6837\u8fd8\u662f\u5229\u7528\u9012\u5f52\u7684\u601d\u60f3\u53bb\u5b9e\u73b0\u00a0&#xff0c;\u6211\u4eec\u7ee7\u7eed\u901a\u8fc7\u753b\u51fd\u6570\u9012\u5f52\u6808\u5e27\u56fe\u6765\u7406\u6e05\u5b83\u7684\u903b\u8f91<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"134\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/07\/20250729232720-688958d844d49.png\" width=\"1241\" \/><\/p>\n<h4 id=\"%E5%87%BD%E6%95%B0%E9%80%92%E5%BD%92%E6%A0%88%E5%B8%A7%E5%9B%BE%EF%BC%9A%C2%A0(%E6%A0%87%E7%9A%84%E5%BA%8F%E5%8F%B7%E8%A1%A8%E7%A4%BA%E6%89%93%E5%8D%B0%E7%9A%84%E9%A1%BA%E5%BA%8F)\">\u51fd\u6570\u9012\u5f52\u6808\u5e27\u56fe&#xff1a;\u00a0(\u6807\u7684\u5e8f\u53f7\u8868\u793a\u6253\u5370\u7684\u987a\u5e8f)<\/h4>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"1263\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/07\/20250729232720-688958d85b0c4.png\" width=\"2137\" \/><\/p>\n<h4 id=\"%E5%90%8E%E5%BA%8F%E9%81%8D%E5%8E%86%E7%BB%93%E6%9E%9C(%E5%BF%BD%E7%95%A5NULL)%EF%BC%9A\">\u540e\u5e8f\u904d\u5386\u7ed3\u679c(\u5ffd\u7565NULL)&#xff1a;<\/h4>\n<ul>\n<li>D B E F C A<\/li>\n<\/ul>\n<hr \/>\n<h2 id=\"%E4%B8%89.%E4%BB%A3%E7%A0%81%E5%B1%95%E7%8E%B0%C2%A0\">\u4e09.\u4ee3\u7801\u5c55\u73b0\u00a0<\/h2>\n<h3 id=\"Tree.h%EF%BC%9A\">Tree.h&#xff1a;<\/h3>\n<p>#pragma once<br \/>\n#include&lt;stdio.h&gt;<br \/>\n#include&lt;assert.h&gt;<br \/>\n#include&lt;stdlib.h&gt;<\/p>\n<p>typedef char BTDataType;<br \/>\ntypedef struct BinaryNode<br \/>\n{<br \/>\nBTDataType data;<br \/>\nstruct BinaryNode* left;\/\/\u5de6\u5b69\u5b50<br \/>\nstruct BinaryNode* right;\/\/\u53f3\u5b69\u5b50<br \/>\n}BTNode;<\/p>\n<p>\/\/\u524d\u5e8f\u904d\u5386<br \/>\nvoid PreOrder(BTNode* root);<\/p>\n<p>\/\/\u4e2d\u5e8f\u904d\u5386<br \/>\nvoid InOrder(BTNode* root);<\/p>\n<p>\/\/\u540e\u5e8f\u904d\u5386<br \/>\nvoid PostOrder(BTNode* root); <\/p>\n<h3 id=\"Tree.c%EF%BC%9A\">Tree.c&#xff1a;<\/h3>\n<p>#include&#034;Tree.h&#034;<\/p>\n<p>\/\/\u524d\u5e8f\u904d\u5386<br \/>\nvoid PreOrder(BTNode* root)<br \/>\n{<br \/>\nif (root &#061;&#061; NULL)<br \/>\n{<br \/>\nprintf(&#034;NULL &#034;);<br \/>\nreturn;<br \/>\n}<br \/>\n\/\/\u6839\u5de6\u53f3<br \/>\nprintf(&#034;%c &#034;, root-&gt;data);<br \/>\nPreOrder(root-&gt;left);<br \/>\nPreOrder(root-&gt;right);<br \/>\n}<\/p>\n<p>\/\/\u4e2d\u5e8f\u904d\u5386<br \/>\nvoid InOrder(BTNode* root)<br \/>\n{<br \/>\nif (root &#061;&#061; NULL)<br \/>\n{<br \/>\nprintf(&#034;NULL &#034;);<br \/>\nreturn;<br \/>\n}<\/p>\n<p>\/\/\u5de6\u6839\u53f3<br \/>\nInOrder(root-&gt;left);<br \/>\nprintf(&#034;%c &#034;, root-&gt;data);<br \/>\nInOrder(root-&gt;right);<br \/>\n}<\/p>\n<p>\/\/\u540e\u5e8f\u904d\u5386<br \/>\nvoid PostOrder(BTNode* root)<br \/>\n{<br \/>\nif (root &#061;&#061; NULL)<br \/>\n{<br \/>\nprintf(&#034;NULL &#034;);<br \/>\nreturn;<br \/>\n}<\/p>\n<p>\/\/\u5de6\u53f3\u6839<br \/>\nPostOrder(root-&gt;left);<br \/>\nPostOrder(root-&gt;right);<br \/>\nprintf(&#034;%c &#034;, root-&gt;data);<br \/>\n} <\/p>\n<h3 id=\"test.c%EF%BC%9A\">test.c&#xff1a;<\/h3>\n<p>#include&#034;Tree.h&#034;<\/p>\n<p>BTNode* buyNode(char x)<br \/>\n{<br \/>\nBTNode* newnode &#061; (BTNode*)malloc(sizeof(BTNode));<br \/>\nnewnode-&gt;data &#061; x;<br \/>\nnewnode-&gt;left &#061; newnode-&gt;right &#061; NULL;<br \/>\nreturn newnode;<br \/>\n}<br \/>\nvoid test1()<br \/>\n{<br \/>\nBTNode* nodeA &#061; buyNode(&#039;A&#039;);<br \/>\nBTNode* nodeB &#061; buyNode(&#039;B&#039;);<br \/>\nBTNode* nodeC &#061; buyNode(&#039;C&#039;);<br \/>\nBTNode* nodeD &#061; buyNode(&#039;D&#039;);<br \/>\nBTNode* nodeE &#061; buyNode(&#039;E&#039;);<br \/>\nBTNode* nodeF &#061; buyNode(&#039;F&#039;);<\/p>\n<p>nodeA-&gt;left &#061; nodeB;<br \/>\nnodeA-&gt;right &#061; nodeC;<br \/>\nnodeB-&gt;left &#061; nodeD;<br \/>\nnodeC-&gt;left &#061; nodeE;<br \/>\nnodeC-&gt;right &#061; nodeF;<\/p>\n<p>\/\/PreOrder(nodeA);<br \/>\n\/\/InOrder(nodeA);<br \/>\nPostOrder(nodeA);<br \/>\n}<\/p>\n<p>int main()<br \/>\n{<br \/>\ntest1();<br \/>\nreturn 0;<br \/>\n} <\/p>\n<hr \/>\n<p><span style=\"color:#4da8ee\">\u00a0\u5f80\u671f\u56de\u987e&#xff1a;<\/span><\/p>\n<p>\u3010\u6570\u636e\u7ed3\u6784\u521d\u9636\u3011&#8211;\u6808\u548c\u961f\u5217(\u4e8c)<\/p>\n<p>\u3010\u6570\u636e\u7ed3\u6784\u521d\u9636\u3011&#8211;\u6811\u548c\u4e8c\u53c9\u6811\u5148\u5bfc\u7bc7<\/p>\n<p>\u3010\u6570\u636e\u7ed3\u6784\u521d\u9636\u3011&#8211;\u4e8c\u53c9\u6811(\u4e8c)<\/p>\n<p>\u3010\u6570\u636e\u7ed3\u6784\u521d\u9636\u3011&#8211;\u4e8c\u53c9\u6811(\u4e09)<\/p>\n<p><span 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