//This program demonstrates the use of a structure variable to
//store a record of information to a file.
#include <iostream>
#include <fstream>
#include <cctype>  // for toupper
using namespace std;

const int NAME_SIZE = 51, ADDR_SIZE = 51, PHONE_SIZE = 14;

// Declare a structure for the record
struct Info
{
    char name[NAME_SIZE];
    int  age;
    char address1[ADDR_SIZE];
    char address2[ADDR_SIZE];
    char phone[PHONE_SIZE];
};

int main()
{
    Info person;                // Store information about a person
    char response;              // User response

    // Create file object and open file.
    fstream people("people.dat", ios::out | ios::binary);
    if (!people)
    {
        cout << "Error opening file. Program aborting.\n";
        return 0;
    }

    // Keep getting information from user and writing it
    // to the file in binary mode.
    do
    {
        cout << "Enter the following information about a person:\n";
        cout << "Name: ";
        cin.getline(person.name, NAME_SIZE);
        cout << "Age: ";
        cin >> person.age;
        cin.ignore();           // Skip over remaining newline.
        cout << "Address line 1: ";
        cin.getline(person.address1, ADDR_SIZE);
        cout << "Address line 2: ";
        cin.getline(person.address2, ADDR_SIZE);
        cout << "Phone: ";
        cin.getline(person.phone, PHONE_SIZE);
        people.write(reinterpret_cast<char *>(&person), sizeof(person));
//      people.write((char *)&person, sizeof(person));  //older method of type casting
        cout << "Do you want to enter another record? ";
        cin >> response;
        cin.ignore();
    } while (toupper(response) == 'Y');

    // Close file.
    people.close();

    // Open file for binary reading.
    people.open("people.dat", ios::in | ios::binary);
    if (!people)
    {
        cout << "Error opening file. Program aborting.\n";
        return 0;
    }

    // Label the output.
    cout << "Here are the people in the file:\n\n";

    // Read one structure at a time and echo to screen.
    people.read(reinterpret_cast<char *>(&person), sizeof(person));
//  people.read((char *)&person, sizeof(person));       //older method of type casting
    while (!people.eof())
    {
        cout << "Name: ";
        cout << person.name << endl;
        cout << "Age: ";
        cout << person.age << endl;
        cout << "Address line 1: ";
        cout << person.address1 << endl;
        cout << "Address line 2: ";
        cout << person.address2 << endl;
        cout << "Phone: ";
        cout << person.phone << endl;
        cout << "\nStrike any key to see the next record.\n";
        cin.get(response);
        people.read(reinterpret_cast<char *>(&person), sizeof(person));
//      people.read((char *)&person, sizeof(person));   //older method of type casting
    }
    cout << "That's all the information in the file!\n";

    // Close file.
    people.close();

    return 0;
}