s_n-l_obj.cpp

struct A()
{
    A& get();
    int member;
  private:
    A();
    A& A( const A& ) = delete;
    A& operator=( const A& ) = delete;
};

A& A::get
{
    static A a;
    return a;
}

int main()
{
    // mainloop
    while( true )
    {
        A::get().member;
        // ...
        A::get().member;
        // ...
    }
}