Delete NULL but no compile error

Question

I\'m confused why the following C++ code can compile. Why does a call to delete the method of 0 not produce any error?!

int *arr = NULL;     // or if I use 0         


        

Answer 1

You can delete a NULL pointer without problem, and the error you may/can have won't be at compilation time but at runtime.

int *ptr_A = &a;
ptr_A = NULL;
delete ptr_A;

Usually it's convenient to do :

...
delete ptr;
ptr = NULL;