#include<stdio.h>
#include<string.h>
#include<stdlib.h>
typedef struct Node
{
      char Name[80], Phone[80], Email[80];
      struct Node* leftChild;
      struct Node* rightChild;
      struct Node* parent;
}Node;
Node* root;
Node* makeNode(char *s1, char* s2, char* s3)
{
      Node*p = (Node*)malloc(sizeof(Node));
      strcpy(p->Name,s1);
      strcpy(p->Phone,s2);
      strcpy(p->Email,s3);
      p->parent = NULL;
      p->leftChild = NULL;
      p->rightChild = NULL;
      return p;
}
void addNode(Node*p)
{
      if(root == NULL)
      {
            root = p;
            return;
      }
      Node*q = root;
      int cmp;
      while(1)
      {
            if(q == NULL)
            {
                  q = p;
                  return;
            }
            cmp = strcmp(q->Name,p->Name)
            switch(cmp)
            {
                  case 0:
                  return;
                  case -1:
                  q = q->rightChild;
                  break;
                  case 1:
                  q = q->leftChild;
                  break;
            }
      }
}