sum int

#include <iostream>

using namespace std;

template <size_t sz>
int sum (const int(&a)[sz]){
    int result = 0;
    for (size_t i = 0; i < sz; ++i){
        result += a[i];
    }
    return result;
}

int main()
{
    int arr [5] = {1,2,3,4,5};
    int sum_result  = sum(arr);
    cout << "the sum is = " << sum_result;

}