1. #include <iostream>
2. #include <vector>
3. #include <memory>
4. #include <string>
5.  
6. class Vehicle {
7. public:
8.    std::string name() const { return name_; }
9.    int number_of_wheels() const { return number_of_wheels_; }
10.  
11.    virtual ~Vehicle() = default;
12.  
13. protected:
14.    Vehicle(const std::string &name, int number_of_wheels)
15.        : name_(name), number_of_wheels_(number_of_wheels) {}
16.  
17.    std::string name_;
18.    int number_of_wheels_;
19. };
20.  
21. class Car : public Vehicle{
22. public:
23.    Car(const std::string  &name, int horsepower)
24.        : Vehicle(name, 4), horsepower_(horsepower) {}
25.  
26.    int horsepower() const { return horsepower_; }
27.  
28. private:
29.    int horsepower_;
30. };
31.  
32. class Bike : public Vehicle {
33. public:
34.    Bike(const std::string &name, bool has_derailleur)
35.        : Vehicle(name, 2), has_derailleur_(has_derailleur) {}
36.  
37.    bool has_derailleur() { return has_derailleur_; }
38.  
39. private:
40.    bool has_derailleur_;
41. };
42.  
43. void display_vehicle_info(std::vector<std::unique_ptr<Vehicle>> a){
44.     for (int i = 0; i <=5; i++) {
45.         if(typeid (a) == typeid (Car)){
46.             Car &some_car = dynamic_cast<Car &>(*a[i]);
47.             std::cout << "car: " << some_car.name() << "has: " << some_car.horsepower() << " HP" << std::endl;
48.         }
49.         if(typeid (a) == typeid (Bike)){
50.             Bike &some_bike = dynamic_cast<Bike &>(*a[i]);
51.             std::cout << "bike: " << some_bike.name() << " - derailleur: " << some_bike.has_derailleur() << std::endl;
52.         }
53.     }
54. }
55.  
56. //        if(typeid (a) == typeid (Car)){
57. //        Car *some_car = dynamic_cast<Car *>(a[i].get());
58. //        if (some_car != nullptr) { // cast successful
59. //            std::cout << i << ": HP" << some_car->horsepower() << std::endl;
60. //        } else { // nope
61. //            std::cout << i << ": not a Car" << std::endl;
62. //        }
63. //        }
64. //        if(typeid (a) == typeid (Bike)){
65. //            Bike *some_bike = dynamic_cast<Bike *>(a[i].get());
66. //            if (some_bike != nullptr) { // cast successful
67. //                std::cout << i << ": H_D" << some_bike->has_derailleur() << std::endl;
68. //            } else { // nope
69. //                std::cout << i << ": not a Bike" << std::endl;
70. //            }
71. //        }
72.  
73. int main()
74. {
75.    std::vector<std::unique_ptr<Vehicle>> vehicles;
76.  
77.    vehicles.emplace_back(std::make_unique<Bike>("Fixie", false));
78.    vehicles.emplace_back(std::make_unique<Car>("Porsche", 400));
79.    vehicles.emplace_back(std::make_unique<Bike>("Road Bike", true));
80.    vehicles.emplace_back(std::make_unique<Bike>("MTB", true));
81.    vehicles.emplace_back(std::make_unique<Car>("Passat", 115));
82.  
83.    display_vehicle_info(vehicles);
84. }
85.