Calculate Array Sum Using Only Pointers

Code

#include <stdio.h>

int calculate_sum(int *ptr, int n) {
    int sum = 0;
    int *end = ptr + n;   // Pointer to element just after the last one

    while (ptr < end) {
        sum += *ptr;      // Add value at pointer
        ptr++;            // Move pointer to next element
    }

    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