Unsafe dynamic_cast without null validation

#include <iostream>
#include <string>

class Vehicle {
public:
    virtual ~Vehicle() {}
};

class Car : public Vehicle {
public:
    std::string honk() { return "Beep"; }
};

class Bike : public Vehicle {};

std::string castAndAccessVehicle(bool isCar) {
    Vehicle* v = isCar ? static_cast<Vehicle*>(new Car()) : static_cast<Vehicle*>(new Bike());
    // Unchecked downcast: returns nullptr if v is Bike, causing segfault
    Car* c = dynamic_cast<Car*>(v);
    std::string sound = c->honk();
    delete v;
    return sound;
}

int main() {
    std::cout << castAndAccessVehicle(true) << std::endl;
    return 0;
}