#ifndef TREEH_H
  #define TREEH_H
  
  #include <stdlib.h>
  #include <stdio.h>
  #include <string.h>

  #include <stdbool.h>

  #include <ctype.h>

  #define NBCHAR 26 //A-Z

  #define NOT_AN_END 0x00

  #define COMMON_END 0x03

  #define PROPER_END 0x0C

  #define ACRONYME_END 0x30

  #define STRAIGHT_END 0x15
  #define APOSTROPHE_END 0x2A

  typedef char *string,byte;

  typedef struct _node node, *tree;

  struct _node{

    char letter;

    byte isEnd;

    //0 no,1 yes,+2 if ends with 's

    //*4 if proper, *16 if allUpper 

    node* next[NBCHAR];
  };

  tree make_empty_tree();//create a null node*
  node* make_empty_node();//malloc a node and initialize it

  node* make_node(char,byte);//id

  void delete_tree(tree*);//free(tree) and delete tree on all t->next

  bool is_empty(const tree);//==NULL
  bool is_followed(const tree);//if true tree has following letters

  
  //endKind functions

  bool is_end(const tree);//true when  at least 1 of the following functions is true
  bool is_straight_end(const tree);//if true word can end here
  bool ends_with_apostrophe(const tree);//if true word can end here with apostrophe

  bool is_common_end(const tree);//if true all letters are lower
  bool is_proper_end(const tree);//if true 1st letter is upper  
  bool is_acronyme_end(const tree);//if true all letters are upper

  
  //other

  int hash(char);//need to check if isalpha

  bool ischar_of_word(char);//tells if char can be in a word
  bool is_word(byte endKind);//pass end_kind() as parameter
  byte end_kind(string);

  #endif //TREEH_H