Excel Sheet Row Numbers

#include <iostream>
#include <string>

/*
Translate number to string presentation: 1->a, 27->aa, 28->ab
http://www.leetcode.com/2010/10/amazon-bar-raiser-interview-question.html
*/
std::string num_to_string(int n)
{
	std::string res = "";

	while (n != 0)
	{
		char cur_char = (char)((n % 26) + 'a' - 1);
		std::string cur_str(1, cur_char);
		n /= 26;
		res = cur_str + res;
	}

	return res;
}

int main()
{
	std::string res = num_to_string(1);

	return 0;
}