阅读以下说明和C语言函数,将应填入(n)处的语句写在对应栏内。【说明】本程序利用非递归算法实现二叉树后序遍历。【函数】include<stdio.h>include<stdlib.h>typedef struct node{/*二叉树的结点数据结构类型*/char data;struct node *left;struct node *right;}BTREE;void SortTreelnsert(BTREE **tree, BTREE *s){if(*tree==NULL)*tree=s;elseif(s->data<(*tree)->data)SortTreelnsert((1),s);else if(s->data>=(*tree)->data)SortTreelnsert((2),s);}void TraversalTree(BTREE *tree){BTREE *stack[1 000],*p;int tag[1000],top=0;p=tree;do{while(p !=NULL){stack[++top]=p;(3);tag[top]=0; /*标记栈顶结点的左子树已进行过后序遍历*/}while(top>0(4))/*栈顶结点的右子树是否被后序遍历过*/{p=stack[top--];putchar(p->data);}if(top>0)/*对栈顶结点的右子树进行后序遍历*/{(5);tag[top]=1;}}while(top>0);}void PrintSortTree(BTREE *tree){if(tree !=NULL){printSortTree(tree->left);putchar(tree->data);pdntSortTree(tree->right);}}main(){BTREE *root=NULL, *node;char ch;ch=getchar();while(ch !=''){node=(BTREE*)malloc(sizeof(BTREE));node->data=ch;node->left=node->right=NULL;SortTreelnsert(root, node);ch=getchar();}PrintSortTree(root);putchar('\n');TraversalTree(root);}
阅读以下说明和C语言函数,将应填入(n)处的语句写在对应栏内。
【说明】
本程序利用非递归算法实现二叉树后序遍历。
【函数】
include<stdio.h>
include<stdlib.h>
typedef struct node{/*二叉树的结点数据结构类型*/
char data;
struct node *left;
struct node *right;
}BTREE;
void SortTreelnsert(BTREE **tree, BTREE *s)
{
if(*tree==NULL)*tree=s;
else
if(s->data<(*tree)->data)
SortTreelnsert((1),s);
else if(s->data>=(*tree)->data)
SortTreelnsert((2),s);
}
void TraversalTree(BTREE *tree)
{
BTREE *stack[1 000],*p;
int tag[1000],top=0;
p=tree;
do{
while(p !=NULL)
{
stack[++top]=p;
(3);
tag[top]=0; /*标记栈顶结点的左子树已进行过后序遍历*/
}
while(top>0&&(4))/*栈顶结点的右子树是否被后序遍历过*/
{
p=stack[top--];
putchar(p->data);
}
if(top>0)/*对栈顶结点的右子树进行后序遍历*/
{
(5);
tag[top]=1;
}
}while(top>0);
}
void PrintSortTree(BTREE *tree)
{
if(tree !=NULL)
{
printSortTree(tree->left);
putchar(tree->data);
pdntSortTree(tree->right);
}
}
main()
{
BTREE *root=NULL, *node;
char ch;
ch=getchar();
while(ch !='')
{
node=(BTREE*)malloc(sizeof(BTREE));
node->data=ch;
node->left=node->right=NULL;
SortTreelnsert(&root, node);
ch=getchar();
}
PrintSortTree(root);
putchar('\n');
TraversalTree(root);
}