Excel Sheet Row Numbers

#include <iostream>#include <string>/*Translate number to string presentation: 1->a, 27->aa, 28->abhttp://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;}