[C++ Primer] Passing an array to a function by reference/pointers -- sample

#include <cstdlib>
#include <iostream>

using namespace std;

// Takes a pointer to the array, and the size of the array.
void print_arr1(const int *arr, size_t size)
{
    for (size_t ix = 0; ix != size; ++ix) {
        cout << arr[ix] << ' ';
    }
    cout << endl;
}

// Takes 2 pointers. One to the beginning of the array, 
// and one to 1 past the last element - just like iterating through a vector.
void print_arr2(const int *beg, const int *end)
{
    for (/* empty */; beg != end; ++beg) {
        cout << *beg << ' ';
    }
    
    cout << endl;
}

// Takes an array of size 10 and uses it as a const reference.
void print_arr3(const int (&arr)[10])
{
    size_t size = 10;
    for (size_t ix = 0; ix != size; ++ix) {
        cout << arr[ix] << ' ';
    }
    cout << endl;
}

int main() 
{
    int arr[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
    int *parr = arr;
        
    print_arr1(parr, 10);
    print_arr2(parr, parr+10);
    print_arr3(arr);    
    
    return EXIT_SUCCESS;
}