Функция и параметър едномерен масив

// Functions and arrays

#include "stdafx.h"

#include <iostream>
#include <ctime>
using namespace std;

double average(int arr[], const int size)
{
    double sum = 0.0;
    for (int i = 0; i<size; ++i)
        sum += arr[i];
    return sum / size;
}

void Plus1(int arr[], const int size)
{
    for (int i = 0; i < size; ++i)
        arr[i]++;
    return;
}

void PrintArray(int arr[], const int size, const char* S)
{
    cout << S;
    for (int i = 0; i < size; ++i) cout << arr[i] << " ";
    cout << endl;
}

int main()
{
    srand((unsigned)time(NULL));
    const int n = 10;
    // Пример със статичен масив
    int A[n] = { 4,6,78,3,1,3,5,7,4,2 };
    cout << "Average of A = " << average(A, n) << endl;
    PrintArray(A, n, "Array A now: ");
    Plus1(A, n);
    PrintArray(A, n, "Array A after Plus1: ");
    cout << "Average of A +1 = " << average(A, n) << endl;
    // Пример с динамичен масив със случайни числа
    int* p = new int[n];
    for (int i = 0; i<n; ++i)
        p[i] = rand() % 100;
    PrintArray(p, n, "Array p now: ");
    cout << "Average of p = " << average(p, n) << endl;
    delete[] p;
    return 0;
}