Memory Allocation of Static Members in a Class

Question

I posted a question recently: Initialization of Static Class members.

Now please check this code:

#include
class A
{
    static int o         


        

Answer 1

The member obj_s is static this means it is defined independently of the class.

The line:

int A::obj_s=0;

Not only defines its value but also defines the memory it uses.
That is why in the previous question you were getting a linker error (no space had been allocated for 'obj_s`. Now that you have added the line the compiler is defined the memory location(s) used by the object and the program now links.