|  | @@ -8,17 +8,17 @@ using namespace std;
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				|  |  |  // Iterates though all people in the AddressBook and prints info about them.
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				|  |  |  void ListPeople(const tutorial::AddressBook& address_book) {
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				|  |  | -  for (int i = 0; i < address_book.person_size(); i++) {
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				|  |  | -    const tutorial::Person& person = address_book.person(i);
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				|  |  | +  for (int i = 0; i < address_book.people_size(); i++) {
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				|  |  | +    const tutorial::Person& person = address_book.people(i);
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				|  |  |  
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				|  |  |      cout << "Person ID: " << person.id() << endl;
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				|  |  |      cout << "  Name: " << person.name() << endl;
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				|  |  | -    if (person.has_email()) {
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				|  |  | +    if (person.email() != "") {
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				|  |  |        cout << "  E-mail address: " << person.email() << endl;
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				|  |  |      }
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				|  |  |  
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				|  |  | -    for (int j = 0; j < person.phone_size(); j++) {
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				|  |  | -      const tutorial::Person::PhoneNumber& phone_number = person.phone(j);
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				|  |  | +    for (int j = 0; j < person.phones_size(); j++) {
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				|  |  | +      const tutorial::Person::PhoneNumber& phone_number = person.phones(j);
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				|  |  |  
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				|  |  |        switch (phone_number.type()) {
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				|  |  |          case tutorial::Person::MOBILE:
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