/* ------------------ MyClass.h -------------------- */
#ifndef MY_SINGLETON
#define MY_SINGLETON
class MyClass
{
private:

  // member data
  int m_iNum;

  //constructor is private
  MyClass(){}

  //copy ctor and assignment should be private
  MyClass(const MyClass &);
  MyClass& operator=(const MyClass &);

public:

  //strictly speaking, the destructor of a singleton should be private but some
  //compilers have problems with this so I’ve left them as public in all the
  //examples in this book
  ~MyClass();

  //methods
  int GetVal()const{return m_iNum;}
  static MyClass* Instance();
};
#endif