#include <stdio.h>

int sum(int arr[], int n) {
    int result = 0;
    for (int i = 0; i < n; i++)
        result += arr[i];
    return result;
}

int main() {
    int numbers[] = {5,6,4,2,1};
    int count = sizeof(numbers)/ sizeof(numbers[0]);
    int total_sum = sum(numbers, count);
    printf("Sum of arrays elements: %d\n", total_sum);
    return 0;
}