while (isaspace(c = *s++))
x+1;
(s is an array)

Does the increment to 's' occur after "x+1"  is evaluated, or after
the content of s is assigned to c? Is there a general rule as to when
this type of increment occurs? ( I understand that the increment in "c
= ++*s" occurs immediately before assignment, so my guess is the same
would apply in the "after" scenerio, but not sure).

4.3:    Does *p++ increment p, or what it points to?

A:      Postfix ++ essentially has higher precedence than the prefix
        unary operators.  Therefore, *p++ is equivalent to *(p++); it
        increments p, and returns the value which p pointed to before
p
        was incremented.  To increment the value pointed to by p, use
        (*p)++ (or perhaps ++*p, if the order of the side effect
doesn't
        matter).