A case of forward instancing, how to know if the object were created?

[tonnot]

I have at my prog.h file

 Class tha_class;
 ....
 private:
 Myclass *the_class;

And later at prog.cpp, I have a function that create the instance:
the_class = new Myclass;

My pro.cpp has a destructor.
I have to delete 'the_class', but only it if were created.
How to know that?

Thanks

[hamsterman]

have it point to 0. you should have all unused pointers point to 0.
unless you mean you want to know whether it was int i; the_class = &i; or the_class = new int;. well, you'll have to use a variable to mark this then.