UVa 11332 - Summing Digits (simple recursions)

Link:https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=25&page=show_problem&problem=2307
Sol:

#include <iostream>
	using namespace std;
	int getG(int n)
	{
	if (n / 10 == 0)
	return n;
	else
	{
	int newNum(0);
	while (n)
	{
	newNum += n % 10;
	n /= 10;
	}
	return getG(newNum);
	}
	}
	int main()
	{
	int num;
	cin >> num;
	while (num != 0)
	{
	cout << getG(num) << '\n';
	cin >> num;
	}
	}