52. Calculate Array Sum Using Only Pointers

You are given an array of integers and its size n.
Using only pointer arithmetic:

• Traverse the array
• Find and print the sum of all elements.

❌ Do not use array indexing like arr[I].
✅ Only use pointer movements and dereferencing.

Example-1

Input: n = 5, arr = [1 2 3 4 5]
Output: 15

Example-2

Input: n = 4, arr = [10 20 30 40]
Output: 100

Example-3

Input: n = 3, arr = [-5 5 10]
Output: 10