Node* recursion(Node* head,char* current,char** table)
{
     if((head->left!=NULL)|| (head->right!=NULL))
     {
        if(head->left!=NULL)
        {
         /*unsure*/ recursion(head->left,strcat(current,0),table);
          current[strlen-1]='\0';
        }
        else if(head->right!=NULL)
        {
           /*unsure*/ =recursion(head->right,strcat(current,1),table);
            current[strlen-1]='\0';
        }
     }
    else
    {
       table[head->num]=(char*)malloc(256*sizeof(char));
       table[head->num]=current;
    }
    return 0;

}