二叉树的创建、遍历、深度、叶子节点数

回忆一下，呵呵

# include <stdio.h> # include <malloc.h> typedef struct BiTNode{ <mce:script type="text/javascript" src="http://hi.images.csdn.net/js/blog/tiny_mce/themes/advanced/langs/zh.js" mce_src="http://hi.images.csdn.net/js/blog/tiny_mce/themes/advanced/langs/zh.js"></mce:script><mce:script type="text/javascript" src="http://hi.images.csdn.net/js/blog/tiny_mce/plugins/syntaxhl/langs/zh.js" mce_src="http://hi.images.csdn.net/js/blog/tiny_mce/plugins/syntaxhl/langs/zh.js"></mce:script> int data; struct BiTNode *lchild; struct BiTNode *rchild; }treeNode, *tNode; void createTree(int a[]) { } /** * 插入节点到二叉树中 */ void insert(tNode root,int data) { tNode newNode = (tNode)malloc(sizeof(treeNode)); newNode->data = data; newNode->lchild = NULL; newNode->rchild = NULL; tNode current = root; tNode parent; while (1) { parent = current; if (current->data > newNode->data) { current = current->lchild; if (current == NULL) { parent->lchild = newNode; return; } } else { current = current->rchild; if (current == NULL) { parent->rchild = newNode; return; } } } } /** * 递归中序遍历二叉树 */ void preOrder(tNode root) { if (root != NULL) { preOrder(root->lchild); printf("%d ",root->data); preOrder(root->rchild); } } /** * 求二叉树叶子节点数目 */ int getLeaf(tNode root) { if (root == NULL) return 0; else if (root->lchild == NULL && root->rchild == NULL) return 1; else return getLeaf(root->lchild) + getLeaf(root->rchild); } /** * 求二叉树的深度 */ int getDepth(tNode root) { if (root == NULL) return 0; else return getDepth(root->lchild) > getLeaf(root->rchild)? 1 + getDepth(root->lchild): 1 + getDepth(root->rchild); // { // int depthLchild = 1 + getDepth(root->lchild); // int depthRchild = 1 + getDepth(root->rchild); // return depthLchild > depthRchild ? depthLchild: depthRchild; // } } int main() { tNode root = (tNode)malloc(sizeof(treeNode)); root->data = 10; root->lchild = NULL; root->rchild = NULL; // insert(root,10); insert(root,5); insert(root,15); insert(root,1); insert(root,8); insert(root,20); insert(root,12); preOrder(root); printf("/n"); int numleaf = getLeaf(root); printf("%d/n", numleaf); int depth = getDepth(root); printf("%d/n",depth); return 0; }