#include"stdio.h"#include"conio.h"#include"alloc.h"typedef struct btree{ char data; struct btree *left; struct btree *right;} btnode ,*Btree; Btree Root; void init() { Root=NULL; } void creat(Btree *bt) { char ch; ch=getchar(); if(ch=='.')*bt=NULL; else { *bt=(Btree)malloc(sizeof(btnode...