Question

Let x be an array . which of the following operations are illegal and why

a) ++x   b) x+1  c) x++  d) x - -

Answer 1

Array is a const pointer. i.e., int x[] is same as const * int x

Now, ++x, incrementing a constant not allowed. Same for x++ and x--.

x + 1 =  is valid and goes to the address given by (x + 1*sizeof(*x)) in integer terms.