Soma

#ifndef _LLH_
#define _LLH_
#include <iostream>
#include <string>
using namespace std;

class Tree;
class Node;

class Tree
   {
     private:
       Node *root;
     public:
       Tree();
       ~Tree();
       void add(string name);
       void grade(int number, double score, string thename);
       void print();
       void del(string name);
       double mean(int exam);
       bool empty();
   };
   
class Node
   {
     private:
       Node *parent;
       Node *left;
       Node *right;
       double grade1, grade2, grade3, grade4, grade5;
       int height;
       string name;
     public:
       Node();
       ~Node();
       void setparent(Node *n);
       void setname(string thename);
       void add(string thename, Node *&root);
       double mean(int exam);
       void grade(int number, double score, string thename);
       void print();
       void del(string thename, Node *&root);
       string getname();
       void setchildtonull(string thename);
       Node * slideleft();
       double getgrade(int number);
       double getnumber(int exam);
       double gettotal(int exam);
       void computeheights(Node *&root);
       void rotateleft(Node *&root);
       void rotateright(Node *&root);
       void absheight();
       Node * getleft();
       void setleft(Node *n);
       Node * getright();
       void setright(Node *n);
       int getheight();
       void resetchild(Node *n);
   };
   
#endif