类Car的实例可调用父类Vehicle的move方法,体现了面向对象编程的哪种性质?
class Vehicle {
private:
string brand;
public:
Vehicle(string b) : brand(b) {}
void setBrand(const string& b) { brand = b; }
string getBrand() const { return brand; }
void move() const {
cout << brand << " is moving..." << endl;
}
};
class Car : public Vehicle {
private:
int seatCount;
public:
Car(string b, int seats) : Vehicle(b), seatCount(seats) {}
void showInfo() const {
cout << "This car is a " << getBrand()
<< " with " << seatCount << " seats." << endl;
}
};