7.1.5

#include <iostream>
#include <cmath>

using namespace std;

double
getAverage(int *arr, int size)
{
    int sum;
    for (int i=0;i<size;i++)
    {
        sum+=*arr++;
    }
    return ((double)sum)/size;
}

int main()
{
    int n;
    cin>>n;
    int *Mas=new int[n];
    for (int i=0;i<n;i++)
    {
        cin>>Mas[i];
    }
    cout<<getAverage(Mas,n);
    return 0;
}