sume_partiale_vectori

#include <iostream>
using namespace std;

int main()
{

    unsigned long v[100], s[100], n, i, st, dr;
    cout << "interval(st<dr):";
    cout << "st=";
    cin >> st;
    cout << "dr=";
    cin >> dr;
    cout << "n=";
    cin >> n;
    for (i = 0; i < n; i++)
        cin >> v[i];
    cout << endl;
    s[0] = v[0];
    for (i = 1; i < n; i++)
        s[i] = s[i - 1] + v[i];
    for (i = 0; i < n; i++)
        cout << s[i] << ' ';
    cout << endl;
    cout << "suma:" << s[dr] - s[st - 1];
    return 0;
}