Implementation of a single example mode in C + +

/***
* Ensure that a class has only one instance and provides a global access point to access it
*/

#include <iostream>
#include <string>
using namespace Std;

Class Singelton
{
Private
Singelton () {}
Static singelton* Singel;

Public
Static singelton* getinstance ()
{
if (Singel = = NULL)
{
Singel = new Singelton ();
}
return Singel;
}

};
singelton* Singelton::singel = null;//Note static variable class-outside initialization

Client:
int main ()
{
singelton* s1=singelton::getinstance ();
singelton* s2=singelton::getinstance ();
if (S1 = = s2)
cout<< "OK" <<endl;
Else
cout<< "No" <<endl; return 0;
}

Implementation of a single example mode in C + +