Calculate Array Sum Using Only Pointers

Code

#include <stdio.h>

int calculate_sum(int *ptr, int n) {
    // Your logic here
    int *ptr_start = ptr;
    int *ptr_end = ptr+n-1;
    int sum = 0;
    while(ptr_start<ptr_end)
    {
        sum = sum + *ptr_start + *ptr_end;
        ptr_start++;
        ptr_end--;
    }
    if(ptr_start==ptr_end)
    {
        sum = sum+*ptr_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