我修改了好久，也弄不出来，帮忙看看，谢谢谢谢
#include <stdio.h>
#include <stdlib.h>
#define MaxSize 30
typedef char ElemType;
typedef struct node
{
    ElemType data;
    struct node *lchild;
    struct node *rchild;
}BTNode,*BiTree;

void CreateBTNode(BTNode *&b,char *str)//创建二叉树
{
    BTNode *St[MaxSize],*p=NULL;
    int top=-1,k,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;
        default:p=(BTNode *)malloc(sizeof(MaxSize));
            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];
        }
    }
}

void PreOrder(BTNode *b)//先序
{
    BTNode *St[MaxSize],*p;
    int top=-1;
    if(b!=NULL)
    {
        top++;
        St[top]=b;
        while(top>-1)
        {
            p=St[top];
            top--;
            printf("%c",p->data);
            if(p->rchild !=NULL)
            {
                top++;
                St[top]=p->rchild;
            }
            if(p->lchild !=NULL)
            {
                top++;
                St[top]=p->lchild ;
            }
        }
        printf("\n");
    }
}
void InOrder(BTNode *b)//中序
{
    BTNode *St[MaxSize],*p;
    int top=-1;
    if(b!=NULL)
    {
        p=b;
        while(top>-1||p!=NULL)
        {
            while(p!=NULL)
            {
                top++;
                St[top]=p;
                p=p->lchild ;
            }
            if(top>-1)
            {
                p=St[top];
                printf("%c",p->data);
                p=p->rchild ;
            }
        }
        printf("\n");
    }
}

void CountLeaf(BiTree T,int &count)//统计结点算法
{
   if ( T )
   {
      if ((!T->lchild)&& (!T->rchild))
         count++;     // 对叶子结点计数
      CountLeaf( T->lchild, count);  
      CountLeaf( T->rchild, count);
   }
    else return;
}


void DispBTNode(BTNode *b)//输出二叉树
{
    if(b!=NULL)
    {
        printf("%c",b->data);
        if(b->lchild!=NULL||b->rchild!=NULL)
        {
            printf("(");
            DispBTNode(b->lchild);
            if(b->rchild!=NULL)printf(",");
            DispBTNode(b->rchild);
            printf(")");
        }
    }
}
void LevelOrder(BTNode *b)//层次遍历算法
{
    BTNode *p;
    BTNode *qu[MaxSize];
    int front,rear;
    front=rear=-1;
    rear++;
    qu[rear]=b;
    while(front!=rear)
    {
        front=(front+1)%MaxSize;
        p=qu[front];
        printf("%c",p->data);
        if(p->lchild!=NULL)
        {
            rear=(rear+1)%MaxSize;
            qu[rear]=p->lchild;
        }
        if(p->rchild!=NULL)
        {
            rear=(rear+1)%MaxSize;
            qu[rear]=p->rchild;
        }
    }
}
int BTNodeHeight(BTNode *b)//求二叉树的高度
{
    int lchildh,rchildh;
    if(b==NULL)return(0);
    else
    {
        lchildh=BTNodeHeight(b->lchild );
        rchildh=BTNodeHeight(b->rchild );
        return (lchildh>rchildh)?(lchildh+1):(rchildh+1);
    }
}
BTNode *FindNode(BTNode *b,ElemType x)//查找结点
{
    BTNode *p;
    if(b==NULL)
        return NULL;
    else if(b->data==x)
        return b;
    else
    {
        p=FindNode(b->lchild,x);
        if(p!=NULL)
            return p;
        else
            return FindNode(b->rchild,x);
    }
}

void main()
{
    BTNode *b;
    char str[]={'A','(','B','(','(',')',',','C','(','D',',','(',')',')',')',',','E','(','(',')',',','F',')',')'};
    CreateBTNode(b,str);
    printf("统计结点数:\n");
    //CountLeaf(b,2);
    printf("前序遍历:\n");
    PreOrder(b);
    DispBTNode(b);
    printf("中序遍历:\n");
    InOrder(b);
    printf("层次遍历输出结点如下:\n");
    LevelOrder(b);
    printf("二叉树的高度:\n");
    BTNodeHeight(b);
    printf("查找二叉树的结点:\n");
    BTNode *FindNode();
}

谢谢谢谢你的帮忙，不过改出来了