pr8yakimov

#include <iostream>

void print(int[], int);
int sum(int[], int, int, int, int);

int main() {
    using namespace std;
    setlocale(0, "");

    int D[7] = {5, 65, 43, 7, 11, 91, 8};

    print(D, 7);
    cout << endl;

    cout << "D[1] + D[2] + D[3] = " << sum(D, 6, 1, 2, 3) << endl;
    cout << "D[3] + D[4] + D[5] = " << sum(D, 6, 3, 4, 5) << endl;
    cout << "D[4] + D[5] + D[6] = " << sum(D, 6, 4, 5, 6) << endl;
}

void print(int array[], int size) {
    using namespace std;
    for (int i = 0; i < size; i++) {
        cout << i << ") " << array[i] << endl;
    }
}
int sum(int array[], int size, int i1, int i2, int i3) {
    int result = 0;

    result += array[i1] + array[i2] + array[i3];

    return result;
}