BJFUOJ:基于二叉链表的二叉树左右节点的交换_基于二叉链表的二叉树左右孩子的交换

BJFUOJ：基于二叉链表的二叉树左右孩子的交换

#include<bits/stdc++.h>
using namespace std;
typedef struct BiTnode{
	char data;
	struct BiTnode *left,*right;
}BiTnode,*BiTree;

void CreatTree(BiTree &t,char s[],int &i){
	if(s[i] == '0'){
		t = NULL;
	}else{
		t = new BiTnode;
		t->data = s[i];
		CreatTree(t->left,s,++i);
		CreatTree(t->right,s,++i);
	}
}

void ChangeLeftAndRight(BiTree &t){
	if(t){
		BiTree tt;
		tt = t->left;
		t->left = t->right;
		t->right = tt;
		ChangeLeftAndRight(t->left);
		ChangeLeftAndRight(t->right);
	}
}

void PreOrder(BiTree &t){
	if(t){
		cout<<t->data;
		PreOrder(t->left);
		PreOrder(t->right);
	}
}

int main(){
	while(1){
		char s[100];
		int i = 0;
		cin>>s;
		if(s[0] == '0'){
			break;
		}
		BiTree t;
		CreatTree(t,s,i);
		ChangeLeftAndRight(t);
		PreOrder(t);
		cout<<endl;
	}
	return 0;
}
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53