#include <iostream>
#include "fstream"
#include "sstream"
using namespace std;

struct car {
    char* name;
    float price;
    int year;
};

string * split_car_data(string line){
    string arr[3];
    auto i = 0;
    stringstream ssin(line);
    while (ssin.good() && i < 4){
        ssin >> arr[i];
        ++i;
    }
    return arr;
}

int main() {
    fstream file;
    vector<car> cars;
    vector <string> lines;
    string line;
    auto file_path = "/Users/toczekmj/CLionProjects/testy/pojazdy.txt";
    auto changes = false;


    file.open(file_path);
    if(file.is_open())
    {
        while(getline(file, line))
        {
            auto data = split_car_data(line);
            auto name = data[0];
            auto year = stoi((string)data[1]);
            auto price = stof((string)data[2]);
            char * n_name = new char[name.length()+1];
            std::strcpy(n_name, name.c_str());

            if(year >= 2016 && year <= 2021){
                price -= (price/10);
                changes = true;
            }
            cars.push_back(
                    car{
                        n_name,
                        price,
                        year
                    }
            );
        }
        file.close();
    }

    if(changes){
        file.open(file_path, fstream::out | fstream::trunc);
        if(file.is_open())
        {
            for_each(cars.begin(), cars.end(), [&](const car &item) {
               file << item.name << " " << item.year << " " << item.price << "\n";
            });
        }
    }
    return 0;
}