// Project RandomAccess
// File main2.cpp

#include <iostream>
#include <fstream>
using namespace std;
#include "person.h"

Person read_input(istream &, int);

int main()
{
    Person p;
    int index;

    ifstream fin("person.txt", ios::in | ios::binary);

    cin >> index;
    while(0 <= index && index <= 6)
    {
        p = read_input(fin, index);
        cout << p.name << " " << 
                p.gender << " " << 
                p.age << endl;
        cin >> index;
    }
    return EXIT_SUCCESS;
}

Person read_input(istream &f, int index)
{
    Person p;
    f.seekg(index * sizeof(Person), ios::beg);
    f.read(reinterpret_cast<char *>(&p), 
        sizeof(Person));
    return p;
}

// Sample Input and Output:
// 3
// Mary F 36
// 5
// Jane F 27
// 0
// Tom M 23
// 1
// Bill M 34
// -1