#include<stdio.h> #include<math.h> int Bdepth(BiTree b) { //求二叉树的高度 int ldepth,rdepth; if(b==NULL) return 0; ldepth = Bdepth(b->lchild); rdepth = Bdepth(b->rchild); return (ldepth>rdepth)?(ldepth+1):(rdepth+1); } int Bignodes(BiTree b,Elemtype x) {//求二叉树b中所有大于x结点的值的个数 int num1,num2,num=0; if(b==NULL) return 0; num1 = Bignodes(b->lchild,x); num2 = Bignodes(p->rchild,x); num += num1+num2; if(b->data>x) //if(b->data<x)变成求小于x结点值的个数 num++; return num; } /*统计二叉树中第k层结点的个数 思想:采用先序遍历的递归算法,num初值为0,若当前访问结点b是第k层上的叶子节点 则num++,再求出左右子树第k层上的叶子节点个数num1,num2,最后返回num1+num2*/ int Lnodes(BiTree b,int h,int k,int n) { //h是b所在的层数,初值为1,n是第k层结点的个数,初值为0 if(b==NULL) return 0; else { if(h==k) n++; else if { Lnodes(b->lchild,h+1,k,n); Lnodes(b->rchild,h+1,k,n); } } } int LevelLnodes(BiTree b,int k) { return Lnodes(b,1,k,0); } int Leafnums(BiTree b,int h,int k) { //求二叉树第k层上叶子结点的个数 int num1,num2,num=0; if(b==NULL) return 0; else { if(h==k&&b->lchild==NULL&&b-rchild==NULL) num++; num1 = Leafnums(b->lchild,h+1,k,n); num2 = Leafnums(b->lchild,h+1,k,n); num += num1+num2; return num; } } int LevelLeafk(BiTree b,int k) //求b中第k层上的叶子结点的个数 { return Leafnums(b,1,k); } void FindMinNode(BiTree b,char min) { //求二叉树最小值的结点值 if(b->data<x) min = b->data; FindMinNode(b->lchild,min); //在左子树中找最小值结点值 FindMinNode(b->rchild,min); //在右子树中找最小值结点值 } void MinNode(BiTree b) //输出最小结点值 { if(b!=NULL) { char min = b->data; FindMinNode(b,min); printf("Min = %c",min); } } void FindMaxNode(BiTree b,char Max) { //求二叉树中最大值的结点 if(b->data>Max) Max = b->data; FindMaxNode(b->lchild,Max); FindMaxNode(b->rchild,Max); } void MaxNode(BiTree b) { char max = b->data; FindMaxNode(b,max); printf("Max = %c ",max); }