//二叉树
#include "stdio.h"
#include "malloc.h"
typedef char DataType;
typedef struct node
{
    DataType data;
    struct node *LChild,*RChild;
}BiTnode,*Bitree;

void createTree(Bitree *L)
{
    char ch;
   
      ch=getchar();
      if(ch=='.')
         *L=NULL;
      else
      {
        *L=(Bitree)malloc(sizeof(BiTnode));
        (*L)->data=ch;
        createTree(&((*L)->LChild));
        createTree(&((*L)->RChild));
      }


}

void main()
{
    Bitree *L;
    createTree(L);
  
}