pointers

Question

int a[5] = {22, 33, 44, 55, 66};
int *ptr = NULL;
ptr = a;
printf("%d %x\n", *ptr, ptr);
ptr++;
printf("%d %x\n", *ptr, ptr);
ptr += 3;
printf("%d %x\n", *ptr, ptr);
ptr--;
printf("%d %x\n", *ptr, ptr);
ptr -= 2;
printf("%d %x\n", *ptr, ptr);
In this case , Can i use '0' (zero) instead of 'NULL'.

Answer 1

Yes you can.

Answer 2

Ipang is right.