Re: destructor is not getting called for singleton

Singleton.cpp
--------------
template <class T>
T * Singleton<T>::_instance = 0;

template <class T>
Singleton<T>::Singleton() {}

template <class T>
Singleton<T>::~Singleton()
{
        std::cout<<"Singlton Destructor Called"<<std::endl;
     delete _instance;

}

template <class T>
T& Singleton<T>::instance()
{

     if (!_instance)
        {
                std::cout<<"New object only created once"<<std::endl;
         _instance = new T;
        }
     return *_instance;

}

main.cpp
--------
#include "A.cpp"
int main()
{
   single::instance().test();
   return 0;

}

A.cpp
-----
#include <iostream>
#include <string>
#include <fstream>
#include "Singleton.cpp"

class A
{
public:
    A() { std::cout <<"Constructor A called"<<std::endl;}
    ~A(){ std::cout <<"Destructor A called"<<std::endl;}
    void test(){ std::cout<<"Testing"<<std::endl;}
  };
  typedef Singleton<A> single;

output:
New object only created once
Constructor A called
Testing
--

Hi gurus why the destructor is not getting called for singleton?