#include <array>
#include <iostream>
#include <cstring>  // for memcpy
using namespace std;

void print_array(const array<int,5>&);
void print_array(const array<char,3>&);

// function template prototype
template <typename T, unsigned long size>
ostream& operator<<(ostream&, const array<T,size>&);

int main()
{
	array<int,5> a1 = {2,3,5,7,11};
	cout << "a1="; print_array(a1);
	
	array<char,3> a2 = {'h','e','y'};
	cout << "a2="; print_array(a2);
	
	memcpy(a2.data(),"Wow",a2.size());
	cout << "a2="; print_array(a2);
	
	array<char,3> a3;
	a3.fill('$');
	a3.swap(a2);
	cout << "a2="; print_array(a2);
	
	cout << "a1=" << a1 << endl;
}


void print_array(const array<int,5>& arr)
{
	// iterator for loop
	for (auto arrIt = arr.cbegin(); arrIt != arr.cend(); ++arrIt)
		cout << *arrIt << ' ';
	cout << endl;
}

void print_array(const array<char,3>& arr)
{
	// index for loop
	for (auto i = 0u; i < arr.size(); ++i)
		cout << arr[i];
	cout << endl;
}

template <typename T, unsigned long size>
ostream& operator<<(ostream& out, const array<T, size>& object)
{
	// range-based for loop
	for (const auto& element : object)
		out << element << ' ';
	return out;
}