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#include <iostream> #include <stack> using namespace std; typedef struct Node { Node *l,*r; //struct Node 与 Node 均可以 int num; }*tree; tree root; tree creat(int a[],int b[],int n) { tree ss; for (int i=0;i<n;i++) { if (a[0] == b[i]) { ss = (tree)malloc(sizeof(Node)); ss->num = b[i]; ss->l=creat(a+1,b,i); ss->r=creat(a+i+1,b+i+1,n-i-1); return ss; } } return NULL; } void post_order(tree h) { if (h !=NULL) //if判断一定不能少,因为到叶子的地方就停止了, { post_order(h->l); post_order(h->r); if (root == h) { cout<<h->num<<endl; } else cout<<h->num<<" "; } } int main() { int a[1000],b[1000],n,i; tree h; while (cin>>n) { for(i=0;i<n;i++) { cin>>a[i]; } for (i=0;i<n;i++) { cin>>b[i]; } root = h = creat(a,b,n); post_order(h); } return 0; }
从先序遍历与中序遍历中得到根节点,再根据中序遍历中根的左边(左子树)与右边(右子树),再递归找根。
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原文地址:http://blog.csdn.net/xinwen1995/article/details/45459937