#define CHARS 256
#define BIT_BUFF_SIZE 8
#define BYTE_BUFF_SIZE 1

typedef struct
{
   int ascii;
   int freq;
}letter;


typedef struct node* link;


struct node 
{
  int  weight;
  int  character;
  
  int bit;
  
  link parent;
  link left;
  link right;
  link next;
};


int compare(const void *, const void *);

void CodeIO(int);

link NewNode(letter);
void InsertNode(link);
void RemoveNode(link);
void Display(void);
link maketree(link, link);
void merge(void);

void decode(void);


int height(link);

void traverse(void);
void makeCode(link, int, link *);
int printCode(link);