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

  #include <stdbool.h>

  #define NBCHAR 27 //A-Z + '

  typedef struct _node node, *tree;

  struct node{
    char letter;

    bool isEnd;
    node* next[NBCHAR];
  };

  
  tree make_empty_tree();

  node* make_empty_node();
  node* make_node(char,bool);
  void delete_tree(tree);
  
  bool is_empty(tree);
  bool is_end(tree);
  bool is_followed(tree);//tells if tree has following letters

  
  void addto_tree(tree,char*,int);
  void loadfrom_file(tree,FILE*);
  void loadfrom_keyboard(tree);
  

  
  int hash(char);
  
  
  
  #endif //TREEH_H