recursive array join by seperator

app.cpp

/*(Print an array) Write a recursive method that display all the
elements in an array of intergers, separated by spaces. */
#include<iostream>
#include<string>

using namespace std;

string recursiveJoin(int arr[], string seperator, int size, int index=0)
{
	if (index == size - 1) {
		return std::to_string(arr[index]); 
	}
	else {
		return std::to_string(arr[index])
			.append(seperator)
			.append(recursiveJoin(arr, seperator, size, index + 1));	
	}
}
int main() 
{
	int arrayOfNumbers[] = { 1, 2, 3, 4, 5, 6 };
	int arraySize = std::size(arrayOfNumbers);
	cout << recursiveJoin(arrayOfNumbers, " ", arraySize);
}