标签：order 后序遍历 树节点 赋值 ret type void 接下来 总数
#include<stdio.h> #include<stdlib.h> typedef struct BinaryTreeNode { int data; struct BinaryTreeNode *Left; struct BinaryTreeNode *Right; }Node; //创建二叉树，顺序依次为中间节点->左子树->右子树 Node* createBinaryTree() { Node *p; int ch; printf("输入data"); scanf("%d",&ch); if(ch == 0) //如果到了叶子节点，接下来的左、右子树分别赋值为0 { p = NULL; } else { p = (Node*)malloc(sizeof(Node)); p->data = ch; p->Left = createBinaryTree(); //递归创建左子树 p->Right = createBinaryTree(); //递归创建右子树 } return p; } //先序遍历 void preOrderTraverse(Node* root) { if( root ) { printf("%d",root->data); preOrderTraverse(root->Left); preOrderTraverse(root->Right); } } //中序遍历 void inOrderTraverse(Node* root) { if( root ) { inOrderTraverse(root->Left); printf("%d",root->data); inOrderTraverse(root->Right); } } //后序遍历 void lastOrderTraverse(Node* root) { if( root ) { lastOrderTraverse(root->Left); lastOrderTraverse(root->Right); printf("%d",root->data); } } //二叉树节点总数目 int Nodenum(Node* root) { if(root == NULL) { return 0; } else { return 1+Nodenum(root->Left)+Nodenum(root->Right); } } //二叉树叶子节点数 int Leafnum(Node* root) { if(!root) { return 0; } else if( (root->Left == NULL) && (root->Right == NULL) ) { return 1; } else { return (Leafnum(root->Left) + Leafnum(root->Right)) ; } } int main() { int i; Node *root = NULL; root = createBinaryTree(); printf("二叉树建立成功"); printf("\n"); preOrderTraverse(root); printf("\n"); inOrderTraverse(root); printf("\n"); lastOrderTraverse(root); printf("\n"); i = Leafnum(root); printf("%d",i); printf("\n"); i = Nodenum(root); printf("%d",i); return 0; }标签：order 后序遍历 树节点 赋值 ret type void 接下来 总数
原文地址：http://blog.51cto.com/13645380/2156803
