#include <iostream>

#include <string>

using namespace std;

​

class Car {

  public:

    string brand;

    string model;

​

    Car() {

      brand = "Unknown";

      model = "Unknown";

    }

​

    Car(string b, string m) {

      brand = b;

      model = m;

    }

};

​

int main() {

  Car car1;

  Car car2("BMW", "X5");

  Car car3("Ford", "Mustang");

​

  cout << "Car1: " << car1.brand << " " << car1.model << "\n";

  cout << "Car2: " << car2.brand << " " << car2.model << "\n";

  cout << "Car3: " << car3.brand << " " << car3.model;

  return 0;

}

​