大佬帮忙看看这个错误咋改呀
最后一行显示读取访问权限冲突
void CreatBtree(BTnode*&b,char *str)
{
BTnode* st[max];
BTnode* p=NULL;
int top = -1;
int k;
int j = 0;
char ch;
b = NULL;
ch = str[j];
while (ch != '/0')
{
switch (ch)
{
case '(':
top++;
st[top] = p;
k = 1;
break;
case')':
top--;
break;
case',':
k = 2;
break;
defult:
p = (BTnode*)malloc(sizeof(BTnode));
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];
}
}