Output of this code? Put in necessary header files, please!

const int MAX_ENTRIES = 20;

const int MAX_NAME_LEN = 40;

const int PHONE_LEN = 8;

struct PhoneEntry

{

char name[MAX_NAME_LEN + 1], phone[PHONE_LEN + 1];

};

struct PhoneBookType

{

int numPhones;

PhoneEntry phoneList[MAX_ENTRIES];

};

void ReadPhoneBook(PhoneBookType& APhoneBook);

void ReadEntry(PhoneEntry &entry);

void PrintMatches(const char number[], const PhoneBookType& APhoneBook);

void PrintEntry(const PhoneEntry &entry);

int main()

{

PhoneBookType MyPhoneBook;

char phoneNumber[PHONE_LEN + 1];

ReadPhoneBook(MyPhoneBook);

cout << endl;

cin >> phoneNumber;

while ( cin )

{

PrintMatches(phoneNumber, MyPhoneBook);

cout << endl;

cin >> phoneNumber;

}

return 0;

}

void ReadEntry(PhoneEntry &entry)

{

cin >> entry.phone;

cin >> entry.name;

}

void ReadPhoneBook(PhoneBookType& APhoneBook)

{

cout << "Number of entries in phone book: ";

cin >> APhoneBook.numPhones;

cout << "Enter items in the format " << endl;

for(int i = 0; i < APhoneBook.numPhones; i++)

ReadEntry(APhoneBook.phoneList[i]);

}

void PrintEntry(const PhoneEntry& entry)

{

cout << entry.name << ": " << entry.phone;

}

void PrintMatches(const char number[], const PhoneBookType& APhoneBook)

{

bool foundMatch = false;

cout << "Entries matching " << number << ":" << endl;

for(int i = 0; i < APhoneBook.numPhones; i++)

{

if ( strcmp(APhoneBook.phoneList[i].phone, number) == 0)

{

foundMatch = true;

PrintEntry(APhoneBook.phoneList[i]);

cout << endl;

}

}

if ( !foundMatch )

cout << "-- none" << endl;

}