ООП лаб 9(2/1)

#include <iostream>
#include <string>

using namespace std;

class ship {
protected:
    double weight;
public:
    virtual void input() = 0;
    virtual void print() = 0;
};

class jet_boat : ship {
    double max_speed;
public:
    void input() {
        cout << "Enter weight: ";
        cin >> weight;
        cout << "Enter max speed: ";
        cin >> max_speed;
    }
    void print() {
        cout << "Weight: " << weight << endl;
        cout << "Max speed: " << max_speed << endl;
    }
};

class passenger_liner : ship {
    double number_passengers;
public:
    void input() {
        cout << "Enter weight: ";
        cin >> weight;
        cout << "Enter number of passengers: ";
        cin >> number_passengers;
    }
    void print() {
        cout << "Weight: " << weight << endl;
        cout << "Number of passengers: " << number_passengers << endl;
    }
};

int main() {
    jet_boat j;
    j.input();
    cout << endl;
    j.print();
    cout << endl;
    passenger_liner p;
    p.input();
    cout << endl;
    p.print();



    return 0;
}