How to create Private Constructor.

This program shows how to create the private constructor in C++.

Code:

#include<iostream.h>
#include<conio.h>

class Test
{
	int Data; //Stores the Data
	
	Test(int Val):Data(Val)    //Private Constructor
	{
	}
	
public:
	
	static Test Initialize(int Num) //Static Member Function generally called Factory Method.
	{
		return Test(Num); //Return the Object.
	}
	
	void Display() //Used to display the result.
	{
		cout<<"Value of Data is "<<Data<<endl;
	}
};

void main()
{
	clrscr();
	
	Test Obj = Test::Initialize(10); //Static Member function called to return the object.
	Obj.Display();
	
	getch();
}

 

Hi,
Ya you are right. ByMistake i have written that. I appoligies for that. Thanks for you good comment.

 

It's not needed only in singleton and factory method. Static member can be used any where where you wanna to call static member function without instances of that class.
Because static member functions are not part of member of that class Actually.