# include "btree. H" 
Int main () 
{
Char STR [20]. 
//A 
CreateBTree (tree, "A, (B (G), (D), C (E, F))");//error here 
DispBTree tree (*); 

//B 
BTHeight tree (*); 

//C 
BTNode * p; 
Printf (" please input node: "); 
The scanf (" % c ", p); 
LchildNode (p); 

//D 
DestroyBTree (tree); 
DispBTree tree (*); 
} 



//the header file 
#include  
#include  
#include  
Typedef struct node {
char data; 
Struct node * lchild; 
Struct node * rchild; 
} BTNode; 

Void CreateBTree (BTNode * * b, char * STR) {
BTNode * St [20], * p; 
Int top=1, k, j=0; 
char ch; 
Ch=STR [j];//here suggests the Program received signal SIGSEGV, Segmentation fault 
while(ch!='\ 0') 
{
The switch (ch) 
{
Case '(' : top++; St [top]=p; k=1; break; 
Case ') : top -; break; 
Case ', ': k=2; break; 
Default: p=(BTNode *) malloc (sizeof (BTNode)); 
P - & gt; Data=https://bbs.csdn.net/topics/ch; 
P - & gt; Lchild=p - & gt; Rchild=NULL; 
If ((* b)==NULL) 
* b=p; 
The else 
{
The switch (k) 
{
Case 1: St [top] - & gt; Lchild=p; break; 
Case 2: St [top] - & gt; Rchild=p; break; 
} 
} 
} 
j++; 
Ch=STR [j]; 
Printf (" % c ", ch); 
} 

}