Структура, работа с файлами

#include <iostream>
#include <fstream>
#include <string>
using namespace std;
struct PeripheralDevice {
    string name;
    string manufacturer;
    string country;
    string function;
    float price;
};
 
void write_devices_to_file(PeripheralDevice devices[], int num_devices, const string& filename) {
    ofstream outfile(filename);
    for (int i = 0; i < num_devices; i++) {
        outfile << devices[i].name << "\n"
                << devices[i].manufacturer << "\n"
                << devices[i].country << "\n"
                << devices[i].function << "\n"
                << devices[i].price << "\n\n";
    }
    outfile.close();
}
 
void read_devices_from_file(PeripheralDevice devices[], int num_devices, const string& filename) {
    ifstream infile(filename);
    for (int i = 0; i < num_devices; i++) {
        getline(infile, devices[i].name);
        getline(infile, devices[i].manufacturer);
        getline(infile, devices[i].country);
        getline(infile, devices[i].function);
        infile >> devices[i].price;
        infile.ignore(); 
    }
    infile.close();
}
 
int main() {
    PeripheralDevice devices[3] = {
    {"Printer", "HP", "OfficeJet Pro 9025e", "Wi-Fi", 349.99},
    {"Mouse", "Logitech", "MX Master 3", "Bluetooth", 99.99},
    {"Keyboard", "Microsoft", "Natural Ergonomic Keyboard 4000", "USB", 59.99}
};
 
    const string filename = "devices.txt";
    write_devices_to_file(devices, 3, filename);
 
    PeripheralDevice loaded_devices[3];
    read_devices_from_file(loaded_devices, 3, filename);
 
    PeripheralDevice* min_device = &loaded_devices[0];
    for (int i = 1; i < 3; i++) {
        if (loaded_devices[i].price < min_device->price) {
            min_device = &loaded_devices[i];
        }
    }
 
    cout << "Minimum price device: " << min_device->name
              << " (" << min_device->manufacturer << " " << min_device->function << ")\n";
 
    return 0;
}