第十周项目1（1）-层次遍历算法的验证

btree.h

#ifndef BTREE_H_INCLUDED#define BTREE_H_INCLUDED#define MaxSize 100typedef char ElemType;typedef struct node{    ElemType data;              //数据元素    struct node *lchild;        //指向左孩子    struct node *rchild;        //指向右孩子} BTNode;void CreateBTNode(BTNode *&b,char *str);        //由str串创建二叉链BTNode *FindNode(BTNode *b,ElemType x);     //返回data域为x的节点指针BTNode *LchildNode(BTNode *p);  //返回*p节点的左孩子节点指针BTNode *RchildNode(BTNode *p);  //返回*p节点的右孩子节点指针int BTNodeDepth(BTNode *b); //求二叉树b的深度void DispBTNode(BTNode *b); //以括号表示法输出二叉树void DestroyBTNode(BTNode *&b);  //销毁二叉树#endif // BTREE_H_INCLUDED

btree.cpp

#include <stdio.h>#include "btree.h"void LevelOrder(BTNode *b){    BTNode *p;    BTNode *qu[MaxSize];    //定义环形队列,存放节点指针    int front,rear; //定义队头和队尾指针    front=rear=-1;      //置队列为空队列    rear++;    qu[rear]=b;     //根节点指针进入队列    while (front!=rear) //队列不为空    {        front=(front+1)%MaxSize;        p=qu[front];        //队头出队列        printf("%c ",p->data);  //访问节点        if (p->lchild!=NULL)    //有左孩子时将其进队        {            rear=(rear+1)%MaxSize;            qu[rear]=p->lchild;        }        if (p->rchild!=NULL)    //有右孩子时将其进队        {            rear=(rear+1)%MaxSize;            qu[rear]=p->rchild;        }    }}int main(){    BTNode *b;    CreateBTNode(b,"A(B(D,E(H(J,K(L,M(,N))))),C(F,G(,I)))");    printf("二叉树b: ");    DispBTNode(b);    printf("\n");    printf("层次遍历序列:\n");    LevelOrder(b);    DestroyBTNode(b);    return 0;}