Lab5

#include <iostream>
#include <cstdio>
#include <math.h>
#include <vector>
#include <algorithm>
#include <fstream>
#include <string>

using namespace std;

struct carsInfo
{
    char model[21];
    char country[21];
    float fuelConsumption;
    int carryingCapacity;
    float totalFuelConsumption;
};

bool operator < (const carsInfo &a, const carsInfo &b)
{
    return a.totalFuelConsumption < b.totalFuelConsumption;
}

int main()
{
    ifstream fin("input.bin", ios::binary | ios::in);
    setlocale(LC_ALL, "Russian");

    char country[21] = "Россия";
    int carsQty;
    fin.read((char*)&carsQty, sizeof(carsQty));

    string fileName;
    cout << "Введите имя и расширение выходного файла в формате: имя.расширение" << endl;
    cin >> fileName;

    ofstream fout(fileName, ios::binary | ios::out);

    int loadWeight, distance;
    cout << "Введите груз и расстояние, на которое его нужно перевезти" << endl;
    cin >> loadWeight >> distance;

    vector <carsInfo> allCars;

    for (int i = 0; i < carsQty; i++)
    {
        carsInfo currentCar;
        fin.read((char*)&currentCar, sizeof(currentCar) - sizeof(currentCar.totalFuelConsumption));
        currentCar.totalFuelConsumption = floor((loadWeight / currentCar.carryingCapacity) + 1) * currentCar.fuelConsumption * distance / 100;
        allCars.push_back(currentCar);
    }

    fin.close();

    sort(allCars.begin(), allCars.end());

    int carsCounter = 0;

    for (int i = 0; i < carsQty; i++)
    {
        static float minTotalFuelConsumption = allCars[i].totalFuelConsumption;

        if (allCars[i].totalFuelConsumption == minTotalFuelConsumption)
        {
            carsCounter++;
        }
        else
        {
            break;
        }
    }

    fout.write((char*)&carsCounter, sizeof(carsCounter));

    for (int i = 0; i < carsCounter; i++)
    {
        if (allCars[i].country[0] == 'Р' && allCars[i].country[1] == 'о' && allCars[i].country[2] == 'с')
        {
            fout.write((char*)&allCars[i], sizeof(allCars[i]) - sizeof(allCars[i].totalFuelConsumption));
        }
    }

    for (int i = 0; i < carsCounter; i++)
    {
        if (allCars[i].country[0] != 'Р' && allCars[i].country[1] != 'о' && allCars[i].country[2] != 'с')
        {
            fout.write((char*)&allCars[i], sizeof(allCars[i]) - sizeof(allCars[i].totalFuelConsumption));
        }
    }

    fout.close();

    return 0;
}