#include <stdio.h>
#include <stdlib.h>
#include <string.h>
typedef struct Node
{
      char Name[80], Phone[80], Email[80];
      struct Node *next;
} Node;
typedef struct Queue
{
      struct Node *head;
} Queue;
Node *front(Queue q)
{
      if (q.head == NULL)
            return NULL;
      return q.head;
}
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->next = NULL;
      return p;
}
Queue *makeQueue()
{
      Queue *q;
      q = (Queue *)malloc(sizeof(Queue));
      q->head = NULL;
      return q;
}
void pop(Queue *q)
{
      Node *tmp;
      if (q->head == NULL)
      {
            printf("ERROR\n");
            return;
      }
      tmp = q->head;
      q->head = q->head->next;
      free(tmp);
}
void push(Queue *q, Node *node)
{
      Node *iterator;
      if (q->head == NULL)
      {
            q->head = iterator;
            return;
      }
      iterator = q->head;
      while (iterator->next != NULL)
      {
            iterator = iterator->next;
      }
      iterator->next = q;
      return;
}
int main()
{
      Queue *q = makeQueue();
      FILE *f;
      f = fopen("phonebook.txt", "r");
      if (f == NULL)
      {
            printf("ERROR");
      }
      else
      {
            char s1[80], s2[80], s3[80];
            do
            {
                  fscanf(f, "%s %s %s", s1, s2, s3);
                  Node *newNode = makeNode(s1, s2, s3);
                  push(q, newNode);
            } while (feof(f));
                Node *node = q->front();
            q->pop();
            while (Node != NULL)
            {
                  node = q->front();
                  q->pop();
            }
      }
      return 0;
}