二叉树的建立和遍历 有错误 没结果 帮帮看看
#include<iostream>
#include<stdlib.h>
using namespace std;

#define OK 1
#define ERROR 0
#define OVERFLOW -2

typedef int TElemType ;
typedef int Status;

typedef struct BiTNode{
TElemType data;
struct BiTNode *lchild,*rchild;
}BiTNode,*BiTree;

Status CreatBiTree(BiTree &T)154
{
char ch;
cin>>ch;
if(ch==' ')T=NULL;
else{
  if(!(T=(BiTNode*)malloc(sizeof(BiTNode))))exit(OVERFLOW);
  T->data=ch;
  CreatBiTree(T->lchild);
  CreatBiTree(T->rchild);
}
return OK;
}
Status PreOrder(BiTree &T)
{
if(T)
{
  cout<<T->data;
  PreOrder(T->lchild);
  PreOrder(T->rchild);
}
return OK;
}


int main()
{
BiTree T;
CreatBiTree(T);
PreOrder(T);
return OK;
}

谢谢大家！！！！非常感谢！！！！！