//
// Created by trykr on 22.02.2020.
//

#include <iostream>
#include <cstdlib>
#include <cstring>
using namespace std;
class Car
{
private:
    char Id[10];
public:
    Car(const char id);
    bool lessId(const Car&) const;
    const char* id() const;
    Car(const char* id)
    {
        strncpy(Id, id, 10);
    }

    bool lessId(const Car &other)
    {
        return strcmp(Id, other.Id) < 0;
    }
    const char* id() const {
        return Id;
    }
    int Cmp(const void* c1_ptr, const void* c2_ptr)
    {
        Car **c1 = reinterpret_cast<Car**>(c1);
        Car **c2 = reinterpret_cast<Car**>(c2);

        return
                (*c1)->lessId(**c2) ? -1:
                (*c2)->lessId(**c2) ? 1 :
                0;
    }
};
int main()
{
    Car c1("1");
    Car c2("2");
    Car c3("3");
    Car* collection[3] = {&c1, &c2, &c3};
    qsort(collection, 3, sizeof(Car*), Car::Cmp(&с1, &c2));
}