Question

Please have a look at the following code

GameObject.cpp

#include "GameObject.h"


GameObject::GameObject(void)
{
    id = 0;
}

GameObject::GameObject(int i)
{
    id = i;
}


GameObject::~GameObject(void)
{
}

GameObject.h

#pragma once
class GameObject
{
public:
    GameObject(void);
    GameObject(int);
    ~GameObject(void);


    int id;
};

Main.cpp

#include <iostream>
#include "GameObject.h"

using namespace std;

int main()
{
    GameObject obj1;
    cout << obj1.id << endl;

    GameObject obj2(45);
    cout << obj2.id << endl;;

    system("pause");
    return 0;
}

Now, I want to make sure that it is not possible to define an object of the gameObject type using default constructor. How can I do it? Please help!

Answer 1

You can make the default constructor private.

As a sample, usually, when we implement a singleton class, we make the default constructor private and provide a static public “instance” method.