Pointer Arithmetic

• Pointers are variables of integral type (addresses are integers)
• Some arithmetic operators are overloaded for pointers
• The unary operators ++ and --
• (pointer) + (int) = (pointer)
• (pointer) - (pointer) = (int)
• Keep in mind that each "unit" represents an entire object
  - helps in remembering the rules for pointer arithmetic
• Examples: assume either int A [10]; or int* A = new int [10];

  A     = &A[0]    = base address of allocated memory block
  A[0]  = *A       = reference to value stored at base address
  &A[3] = A + 3    = address of element at index 3 
  A[3]  = *(A + 3) = reference to value stored at index 3