Answer Posted / arun

#include<iostream>
using namespace std;

class Singleton
{
public:
static Singleton* Instance();
private:
static Singleton* pinstance;
Singleton();
};

Singleton* Singleton::pinstance = 0;// initialize pointer
Singleton* Singleton::Instance ()
{
if (pinstance == 0) // is it the first call?
{
pinstance = new Singleton; // create sole instance
}
return pinstance; // address of sole instance
}
Singleton::Singleton()
{
//... perform necessary instance initializations
}

void main()
{
Singleton *p1 = Singleton::Instance();
cout<<p1<<endl;
Singleton *p2 = p1->Instance();
cout<<p2<<endl;
Singleton & ref = * Singleton::Instance();
}

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