SDUT 3346 数据结构实验之二叉树七：叶子问题

 1 #include <iostream>
 2 #include <cstdio>
 3 
 4 using namespace std;
 5 
 6 struct Tree
 7 {
 8     char c;
 9     Tree *lt,*rt;
10 };
11 
12 Tree *creat(char *&xx)
13 {
14     if(*xx==‘\0‘)
15         return NULL;
16     if(*xx==‘,‘)
17     {
18         xx++;
19         return NULL;
20     }
21     Tree *r=new Tree;
22     r->c=*xx++;
23     r->lt=creat(xx);
24     r->rt=creat(xx);
25     return r;
26 }
27 
28 void cxvisit(Tree *r)
29 {
30     Tree *que[100];
31     int i=0,j=0;
32     que[j++]=r;
33     while(i<j)
34     {
35         if(que[i])
36         {
37             que[j++]=que[i]->lt;
38             que[j++]=que[i]->rt;
39             if(que[i]->lt==NULL&&que[i]->rt==NULL)
40                 printf("%c",que[i]->c);
41         }
42         i++;
43     }
44 }
45 
46 int main()
47 {
48     char xx[55],*p;
49     Tree *root;
50     while(scanf("%s",xx)!=EOF)
51     {
52         p=xx;
53         root=creat(p);
54         cxvisit(root);
55         printf("\n");
56     }
57     return 0;
58 }
59 
60 /***************************************************
61 User name: ***
62 Result: Accepted
63 Take time: 0ms
64 Take Memory: 156KB
65 Submit time: 2016-11-03 18:43:40
66 ****************************************************/