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Cpp1.cpp
Package: Cpp1.rar [view]
Upload User: hzhdmaoyi
Upload Date: 2022-07-30
Package Size: 1k
Code Size: 3k
Category:
Data structs
Development Platform:
Visual C++
- #include <stdio.h>
- #include <malloc.h>
- #include <stdlib.h>
- #define MaxSize 100 //空间上限
- typedef char ElemType;//数据单元定义为字符型
- typedef struct node//标准二叉树型结构
- { ElemType data;
- struct node *lchild;
- struct node *rchild;
- }BiTNode;
- void CreateBiTNode(BiTNode *&b)//创建树
- {
- BiTNode *St[MaxSize],*p=NULL;
- int top=-1,k,j=0,a;
- char ch0,ch;
- char str[MaxSize];
- b=NULL;
- printf("请输入一个格式为A(B,C)的二叉树:n以#结束n");
- ch0=getchar();
- for(a=0;ch0!='#';a++){
- str[a]=ch0;
- ch0=getchar();
- }
- ch=str[j];
- while(ch!='#')
- {
- switch(ch)
- {
- case'(':top++;St[top]=p;k=1;break;
- case')':top--;break;
- case',':k=2;break;
- default:p=(BiTNode *)malloc(sizeof(BiTNode));
- p->data=ch;p->lchild=p->rchild=NULL;
- if(b==NULL)
- b=p;
- else
- { switch(k)
- {
- case 1:St[top]->lchild=p;break;
- case 2:St[top]->rchild=p;break;
- }
- }
- }
- j++;
- ch=str[j];
- }
- }
- void DispBiTNode(BiTNode *b)//由上至下深度遍历输出树
- {
- if(b!=NULL)
- { printf("%c",b->data);
- if (b->lchild!=NULL||b->rchild!=NULL)
- { printf("(");
- DispBiTNode(b->lchild);
- if (b->rchild!=NULL)printf(",");
- DispBiTNode(b->rchild);
- printf(")");
- }
- }
- }
- void Path(BiTNode *b,ElemType path[],int pathlen)//倒序导出路径
- {
- int i;
- if (b!=NULL)
- {
- if(b->lchild==NULL&&b->rchild==NULL)
- {
- printf("%c到根结点路径:%c",b->data,b->data);
- for(i=pathlen-1;i>=0;i--)
- printf("%c",path[i]);
- printf("n");
- }
- else
- {
- path[pathlen]=b->data;
- pathlen++;
- Path(b->lchild,path,pathlen);
- Path(b->rchild,path,pathlen);
- pathlen--;
- }
- }
- }
- void Path0(BiTNode *b,ElemType path[],int pathlen)//正序导出路径
- {
- int i;
- if (b!=NULL)
- {
- if (b->lchild!=NULL&&b->rchild!=NULL)
- {
- path[pathlen]=b->data;
- pathlen++;
- Path0(b->lchild,path,pathlen);
- Path0(b->rchild,path,pathlen);
- }
- else
- { printf("从根节点到子结点的路径:");
- for(i=0;i<=pathlen-1;i++)
- printf("%c",path[i]);
- printf("%c",b->data);
- printf("n");
- }
- }
- }
- void FroutBiTNode(BiTNode *b)//前序遍历输出,非递归
- {
- BiTNode *code[MaxSize],*t;
- t=b;
- int tot=0;
- code[0]=b;
- while (t!=NULL||tot!=-1)
- {
- while (t!=NULL)
- { if (t!=b) tot++;
- code[tot]=t;
- printf("%c",t->data);
- t=t->lchild;
- }
- t=code[tot];
- t=t->rchild;
- tot--;
- }
- }
- void main()
- {
- BiTNode*b;
- ElemType path[MaxSize];
- int i=0;
- CreateBiTNode(b);
- printf("二叉树b:");
- DispBiTNode(b);
- printf("n");
- Path(b,path,0);
- Path0(b,path,0);
- printf("输出前序遍历结果:");
- FroutBiTNode(b);
- }