Initial checkin.
diff --git a/examples/add_person.cc b/examples/add_person.cc
new file mode 100644
index 0000000..2aca216
--- /dev/null
+++ b/examples/add_person.cc
@@ -0,0 +1,92 @@
+// See README.txt for information and build instructions.
+
+#include <iostream>
+#include <fstream>
+#include <string>
+#include "addressbook.pb.h"
+using namespace std;
+
+// This function fills in a Person message based on user input.
+void PromptForAddress(tutorial::Person* person) {
+ cout << "Enter person ID number: ";
+ int id;
+ cin >> id;
+ person->set_id(id);
+ cin.ignore(256, '\n');
+
+ cout << "Enter name: ";
+ getline(cin, *person->mutable_name());
+
+ cout << "Enter email address (blank for none): ";
+ string email;
+ getline(cin, email);
+ if (!email.empty()) {
+ person->set_email(email);
+ }
+
+ while (true) {
+ cout << "Enter a phone number (or leave blank to finish): ";
+ string number;
+ getline(cin, number);
+ if (number.empty()) {
+ break;
+ }
+
+ tutorial::Person::PhoneNumber* phone_number = person->add_phone();
+ phone_number->set_number(number);
+
+ cout << "Is this a mobile, home, or work phone? ";
+ string type;
+ getline(cin, type);
+ if (type == "mobile") {
+ phone_number->set_type(tutorial::Person::MOBILE);
+ } else if (type == "home") {
+ phone_number->set_type(tutorial::Person::HOME);
+ } else if (type == "work") {
+ phone_number->set_type(tutorial::Person::WORK);
+ } else {
+ cout << "Unknown phone type. Using default." << endl;
+ }
+ }
+}
+
+// Main function: Reads the entire address book from a file,
+// adds one person based on user input, then writes it back out to the same
+// file.
+int main(int argc, char* argv[]) {
+ // Verify that the version of the library that we linked against is
+ // compatible with the version of the headers we compiled against.
+ GOOGLE_PROTOBUF_VERIFY_VERSION;
+
+ if (argc != 2) {
+ cerr << "Usage: " << argv[0] << " ADDRESS_BOOK_FILE" << endl;
+ return -1;
+ }
+
+ tutorial::AddressBook address_book;
+
+ {
+ // Read the existing address book.
+ fstream input(argv[1], ios::in | ios::binary);
+ if (!input) {
+ cout << argv[1] << ": File not found. Creating a new file." << endl;
+ } else if (!address_book.ParseFromIstream(&input)) {
+ cerr << "Failed to parse address book." << endl;
+ return -1;
+ }
+ }
+
+ // Add an address.
+ PromptForAddress(address_book.add_person());
+
+ {
+ // Write the new address book back to disk.
+ fstream output(argv[1], ios::out | ios::trunc | ios::binary);
+ if (!address_book.SerializeToOstream(&output)) {
+ cerr << "Failed to write address book." << endl;
+ return -1;
+ }
+ }
+
+ return 0;
+}
