CPhoneBook02
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//PhoneBook02.cpp

#include <iostream.h>
#include <string.h>

int const MAX_LEN = 10;


const char *testNames[] = 
  {"Bob", "Tom", "Ann", "Ron", "Ben", "Ken", "Rob",
   "Sam", "Don", "Dan", "Tim"};

const int MAX_NAMES = sizeof(testNames)/sizeof(testNames[0]);

const char *testPhones[] = 
  {"111-1111", "222-2222", "333-3333", "444-4444"};

const int MAX_PHONES = sizeof(testPhones)/sizeof(testPhones[0]);

const char *testGroups[] = 
  {"111-1111", "222-2222", "333-3333", "444-4444"};

const int MAX_GROUPS = sizeof(testGroups)/sizeof(testGroups[0]);

struct CPhoneEntry
  {
  char name[MAX_LEN+1];
  char phone[14+1];
  char group[10+1];
  int key;
  CPhoneEntry *next;
  };


class CPhoneBook
  {
  private:
    CPhoneEntry *first;
    CPhoneEntry *last;
    int count;
  public:
    CPhoneBook(void);
    bool insertAtEnd(char name[], char phone[], char group[], int key);
    void display(void);
    void deleteAll(void);
    ~CPhoneBook(void);
    CPhoneBook(char ch);
    CPhoneEntry * searchByName(char name[]);
    void sortByName(void);
    bool insert(CPhoneEntry entry);
    bool modifyPhone(char name[], char newPhone[]);
  };

//'r' random elements
//'u' distinct random elements
//'s' sorted list
//'i' enter from the keyboard
CPhoneBook::CPhoneBook(char ch)
  {
  }


CPhoneBook::~CPhoneBook(void)
  {
  cout << "destructor called\n";
  deleteAll();
  }

//void CPhoneBook::deleteAll(void)
//deletes all the nodes from the linked list
void CPhoneBook::deleteAll(void)
  {
  while (first != NULL)
    {
    last = first->next;
    delete first;
    first = last;
    }
  count = 0;
  }


void CPhoneBook::display(void)
  {
  CPhoneEntry *p;
  cout << "Phone Book[" << count << "]\n";
  p = first;
  while (p != NULL)
    {
    cout << p->name << endl;
    cout << p->phone << endl;
    cout << p->group << endl;
    cout << p->key << endl;
    cout << "--------\n";
    p = p->next;
    };
  }


bool CPhoneBook::insertAtEnd(char name[], char phone[], char group[], int key)
  {
  CPhoneEntry *p;
  p = new CPhoneEntry;
  if (NULL == p)
      return false;

  strcpy(p->name, name);
  strcpy(p->phone, phone);
  strcpy(p->group, group);
  p->key = key;
  p->next = NULL;

  if (NULL == first)
      {
      first = p;
      last  = p;
      }
    else
      {
      last->next = p;
      last = p;
      }

  count++;
  return true;
  }

void testInsertAtEnd(void)
  {
    {
    CPhoneBook myBook;
    myBook.display();
    myBook.insertAtEnd("John", "231-7000", "friend", 1);
    myBook.display();
    myBook.insertAtEnd("Tom",  "231-7001", "enemy", 1);
    myBook.display();
    }

    {
    CPhoneBook yourBook;
    yourBook.display();
    }

  }



CPhoneBook::CPhoneBook(void)
  {
  cout << "constructor called\n";
  count = 0;
  first = NULL;
  last = NULL;
  }


void main(void)
  {
  testInsertAtEnd();
  }