66. 有序数组构造二叉搜索树[array to binary search tree]
【本文链接】
http://www.cnblogs.com/hellogiser/p/array-to-binary-search-tree.html
【题目】
编写一个程序,把一个有序整数数组放到二叉搜索树中。
例如 4,6,8,10,12,14,16
转换为二叉搜索树为
10
/ \
6 14
/ \ / \
4 8 12 16
【分析】
按照中序遍历的方法转换到二叉搜索树中。先要确定一个根节点,然后递归创建左右子树。
【代码】
C++ Code
1
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 |
/*
version: 1.0 author: hellogiser blog: http://www.cnblogs.com/hellogiser date: 2014/5/31 */ // binary tree node struct struct BinaryTreeNode { int value; BinaryTreeNode *left; BinaryTreeNode *right; }; // array to tree recursively BinaryTreeNode *arrayToTree(int array[], int start, int end) { if (start > end) return NULL; int mid = (start + end) / 2; BinaryTreeNode *root = new BinaryTreeNode(); root->value = array[mid]; root->left = arrayToTree(array, start, mid - 1); root->right = arrayToTree(array, mid + 1, end); return root; } // array to tree BinaryTreeNode *ArrayToTree(int array[], unsigned int n) { if (NULL == array || n<=0) return NULL; return arrayToTree(array, 0, n - 1); } |
【参考】
http://blog.csdn.net/dahai_881222/article/details/7816127
【本文链接】
http://www.cnblogs.com/hellogiser/p/array-to-binary-search-tree.html