Compatibility of Pointers

Two pointers are compatible if they point to the same type of object.
Pointers to void
- A pointer to void object (void*) is a pointer that does not point to any object.
- NULL is a pointer to void.
- An object can be declared to be void*.
Assignment-Compatibility of Pointers
- The pointer assignment p1 = p2 is legal if and only if
  - p1 and p2 point to the same type of object, or
  - p2 is a pointer to void.
- Otherwise, cast p2 to be compatible with p1.
  - pi = (int*) pf;
- NULL can be assigned to any pointer.

This page was last modified on Oct 20, 2000

URL: http://people.hsc.edu/faculty-staff/robbk/Coms262/Lectures/CompatibilityPtrs.html