#include <iostream>
#include <fstream>
#include <string>
#include <vector>
using namespace std;

struct Record {
    int a, b;
    vector<string> v;
    Record() : a(), b() {}
    Record(int a, int b) : a(a), b(b) {}
    void add(string s) { v.push_back(s); }
};

bool output(Record& vehicle) {
    string plateNumber("12345");
    ofstream out(plateNumber, ios::binary);
    if (!out)
        return false;

    out.write(reinterpret_cast<char*>(&vehicle.a), sizeof(int));
    out.write(reinterpret_cast<char*>(&vehicle.b), sizeof(int));

    // Write the size of the vector.
    size_t size = vehicle.v.size();
    out.write(reinterpret_cast<char*>(&size), sizeof size);

    // Write the vector data.
    for (size_t i = 0; i < vehicle.v.size(); i++) {
        // Write the size of the string.
        size = vehicle.v[i].size();
        out.write(reinterpret_cast<char*>(&size), sizeof size);

        // Write the string data.
        const char* p = vehicle.v[i].data();
        out.write(p, vehicle.v[i].size());
    }

    return true;
}

bool input(Record& vehicle) {
    string plateNumber("12345");
    ifstream in(plateNumber, ios::binary);
    if (!in)
        return false;

    in.read(reinterpret_cast<char*>(&vehicle.a), sizeof vehicle.a);
    in.read(reinterpret_cast<char*>(&vehicle.b), sizeof vehicle.b);

    // Read the size of the vector.
    size_t vsize = 0;
    in.read(reinterpret_cast<char*>(&vsize), sizeof vsize);

    // Read the vector data.
    for (size_t i = 0; i < vsize; i++) {
        // Read in the size of the string.
        size_t size = 0;
        in.read(reinterpret_cast<char*>(&size), sizeof size);

        // Read in the string.
        char str[1000];
        in.read(str, size);
        vehicle.v.push_back(str);
    }

    return true;
}

int main() {
    Record v(1, 2);
    v.add("one");
    v.add("two");
    v.add("three");

    if (!output(v)) {
        cerr << "Error writing file.\n";
        return 1;
    }

    Record w;
    if (!input(w)) {
        cerr << "Error reading file.\n";
        return 1;
    }

    cout << w.a << ", " << w.b << '\n';
    for (const auto& s : w.v)
        cout << s << '\n';

    return 0;
}