#include <iostream>
using namespace std;

double media_array( double a[], int dim_a )
{
    double somma = 0;
    double media;
    int i;
    for ( i=0; i<dim_a; i=i+1 ) {
        somma = somma + a[i];
    }
    media = somma / dim_a;
    return media;
}

int main( void )
{
    double vet[100];
    int dim_vet;
    int i;
    do {
        cout << "Digita la dimensione del vettore" << endl;
        cin >> dim_vet;
    } while ( dim_vet < 0 );
    for ( i=0; i<dim_vet; i=i+1 ) {
        cout << "Digita il valore di vet[" << i << "]" << endl;
        cin >> vet[i];
    }
    cout << "La media dei valori vale " << media_array( vet, dim_vet ) << endl;
    return 0;
}