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

NULL and 0 aren't the same thing. In C++ you should use 0.

There is nothing syntactically wrong or ambiguous about deleting the null pointer. In fact, this is by definition a no-op; that is, the operation of deleting the 0th address is equivalent to doing nothing at all.