[Solved] How do I write the copy Constructor for Composition? [closed]

by


Try like this:

#include <string>
#include <iostream>

class Pulley{
private:
    int noOfTeeth;

public:
    Pulley(int teeth = 0);

    void show();
};

Pulley::Pulley(int teeth)
: noOfTeeth(teeth)
{
    std::cout << "Pulley constructor called!";
}

void Pulley::show()
{
    std::cout << "\n\nNo of Teeths of Pulley: " << noOfTeeth;
}

class GearBox{
    private:
    std::string transmission;
    Pulley p;

    public:
    GearBox(std::string trans = std::string(), Pulley p = Pulley());

    void show();
};

GearBox::GearBox(std::string trans, Pulley p)
: transmission(std::move(trans))
, p(std::move(p))
{
    std::cout << "Gearbox constructor called!";
}

void GearBox::show()
{
    std::cout << "\n\nTransmission of vehicle: " << transmission;
    p.show();
}

class Vehicle{
private:
    std::string model;
    std::string color;
    GearBox g;

public:
    Vehicle();
    Vehicle(std::string mod = "", std::string col = "", GearBox gr = GearBox());

    void show();
};

Vehicle::Vehicle(std::string mod,std::string col, GearBox gr)
: model(std::move(mod))
, color(std::move(col))
, g(std::move(gr))
{
    std::cout << "Vehicle constructor called!";
}

void Vehicle::show()
{
    std::cout << "\n\nModel of Vehicle: " << model;
    std::cout << "\n\nColor of Vehicle: " << color;
    g.show();
}

int main()
{
    Pulley p(20);
    GearBox g("Manual", p);
    Vehicle V("Honda", "Black", g);
    V.show();
//    system("PAUSE");
}

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solved How do I write the copy Constructor for Composition? [closed]