C++ Primer, Fifth Edition

2.4.3. Top-Level const

As we’ve seen, a pointer is an object that can point to a different object. As a result, we can talk independently about whether a pointer is const and whether the objects to which it can point are const. We use the term top-level const to indicate that the pointer itself is a const. When a pointer can point to a const object, we refer to that const as a low-level const.

Exercises Section 2.4.2

Exercise 2.27: Which of the following initializations are legal? Explain why.

(a) int i = -1, &r = 0;

(b) int *const p2 = &i2;

(c) const int i = -1, &r = 0;

(d) const int *const p3 = &i2;

(e) const int *p1 = &i2;

(f) const int &const ...