Конструктор и сеттер - как использовать для вывода

#include <iostream>
 
using namespace std;
 
class Cargo
{
protected:
    double value;
    string name;
public:
    /*constructor                             list init */
    Cargo(double v = 0.0, string n = "...") : value(v), name(n) {}
 
  
    virtual void Print()const = 0;//virtual func prototype
    ~Cargo(){} //destructor
};
 
class Plane : public Cargo
{
    int amount;
 
public:
    Plane(string n = "...", double v = 0.0, int a = 0){}
    void setData(string n = "...", double v = 0.0, int a = 0)
    {
            name = n;
            value = v;
            amount = a;
 
    }
    double getValue()
    {
            return value;
    }
    double cost()
    {
        return value * amount;
    }
    void Print()const
        {
            cout << "Name:\t" << name  << "\n" << "Value:\t\u20AC " << value << " per tn \n" << "Amount:\t" << amount << " tn\n" << "Cost:\t\u20AC " <<  value * amount << endl << endl;
        }
    ~Plane(){} //destructor
};
 
class Train : public Cargo
{
        int amount;
    public:
    Train(string n = "...", double v = 0.0, int a = 0){}
void setData(string n = "...", double v = 0.0, int a = 0)
    {
            name = n;
            value = v;
            amount = a;
 
    }
        double getValue()
        {
            return value;
        }
            double cost()
    {
        return value * amount;
    }
        void Print()const
        {
            cout << "Name:\t" << name  << "\n" << "Value:\t\u20AC " << value << " per tn \n" << "Amount:\t" << amount << " tn\n" << "Cost:\t\u20AC " <<  value * amount << endl << endl;
        }
    ~Train(){} //destructor
};
 
class Truck : public Cargo
{
        int amount;
    public:
    Truck(string n = "...", double v = 0.0, int a = 0){}
void setData(string n = "...", double v = 0.0, int a = 0)
    {
            name = n;
            value = v;
            amount = a;
 
    }
        double getValue()
        {
            return value;
        }
            double cost()
    {
        return value * amount;
    }
        void Print()const
        {
            cout << "Name:\t" << name  << "\n" << "Value:\t\u20AC " << value << " per tn \n" << "Amount:\t" << amount << " tn\n" << "Cost:\t\u20AC " <<  value * amount << endl << endl;
        }
    ~Truck(){} //destructor
};
 
int main() {
    Plane a;
    Train b;
    Truck c;
    Cargo *pa = &a;//access through pointer
    Cargo *pb = &b;
    Cargo *pc = &c;
    a.setData("First", 480.2, 200);
    b.setData("Second", 225.5, 180);
    c.setData("Third", 189.6, 35);
    
    pa->Print();
    pb->Print();
    pc->Print();
    cout << endl;
    //cout << "Total weight:\t" << a.amount + b.amount + c.amount << " tn" << endl;
    cout << endl;
    cout << "Total cost:\t\u20AC " << a.cost() + b.cost() + c.cost() << endl;
    return 0;
}