Es2

#include <iostream>
#define MAX_DIM 50
#define LIMIT 0

using namespace std;

void derive (float data[], int dim, float diff[]);

int main()
{
    float data[MAX_DIM], diff[MAX_DIM];
    int dim;
    cin >> dim;
    while (dim <= LIMIT || dim > MAX_DIM)
    {
        cout << "Errore." << endl;
        cin >> dim;
    }
    derive(data, dim, diff);
    return 0;
}

void derive (float data[], int dim, float diff[])
{
    for(int i = 0; i < dim; i++)
    {
        cout << "Elemento " << i+1 << ": ";
        cin >> data[i];
    }
    cout << ">-----------------------------------------<" << endl;
    for(int i = 1; i < dim; i++)
    {
        diff[i-1] = data[i] - data[i-1];
        cout << "Diff " << i << ": "<<diff[i-1] << endl;
    }
}