Calculate Array Sum Using Only Pointers

Code

#include <stdio.h>
int calculate_sum(int *ptr, int n) 
{
    // Your logic here
    int * start=ptr;
    int * end=ptr+n-1;
    int sum=0;
    while(start<=end)
    {
        sum +=(*(start));
        start++;
    }
    return sum;
}
int main() 
{
    int n;
    scanf("%d", &n);
    int arr[100];
    for (int i = 0; i < n; i++) 
    {
        scanf("%d", &arr[i]);
    }
    int result = calculate_sum(arr, n);
    printf("%d", result);
    return 0;
}

Solving Approach