Does *p++ increment after dereferencing? [duplicate]

Question

I'm not really sure what the order here is. Is it: 1) Dereference the value of pointer p after increasing it 2) Dereference the value of pointer p before increasing it

Answer 1

There is no ordering between the increment and the dereference. However, the * operator applies to the result of p++, which is the original value of p prior to the increment.

Answer 2

In the operators table, you can see that the suffix operator ++ have higher place than the * unary operator.

Hence, *p++ increase p (and not *p), and return the value of the address that p contained before the increment (since it's the suffix ++).

But the order is implementation-depend. It may begin by dereferencing p, and then increase it, and it may store the old value of p, increase it, and then dereference the old value.