#include <alloc.h>

#define ERROR 0;
#define OK 1;


typedef int ElemType;

typedef struct BinaryTree

{
  ElemType data;
  struct BinaryTree *l;
  struct BinaryTree *r;
}*BiTree,BiNode;

BiNode * new()
{
  return( (BiNode *)malloc(sizeof(BiNode)) );
}

CreateSubTree(BiTree *T,ElemType *all,int i)
{
  if ((all[i]==0)||i>16)
    {
      *T=NULL;
      return OK;
    }
  *T=new();
  if(*T==NULL) return ERROR;
  (*T)->data=all[i];
  CreateSubTree(&((*T)->l),all,2*i);
  CreateSubTree(&((*T)->r),all,2*i+1);
}

CreateBiTree(BiTree *T)
{
  ElemType all[16]={0,1,2,3,0,0,4,5,0,0,0,0,6,0,0,0,};
  CreateSubTree(T,all,1);
}

printelem(ElemType d)
{
  printf("%d\n",d);
}

PreOrderTraverse(BiTree T,int (*Visit)(ElemType d))
{
  if(T){
    if(Visit(T->data))
      if(PreOrderTraverse(T->l,Visit))
	if(PreOrderTraverse(T->r,Visit)) return OK;
    return ERROR;
  } else  return OK;
}
main()
{
  BiTree root;
  CreateBiTree(&root);
  PreOrderTraverse(root,printelem);

}