Simple Array Sum - HackerRank with C++

#include <iostream>

using namespace std;


int simpleArraySum(int a) {
    int n = a;
    int sum = 0;
    int arr[n];
    for(int i=0;i<n;i++)
    {
        cin>>arr[i];
    }
    for(int i=0;i<n;i++)
    {
        sum=sum+arr[i];
    }
    return sum;
}

int main()
{
    int n,rslt;
    cin>>n;
    rslt = simpleArraySum(n) ;
    cout<<rslt;
}