leetcode Excel Sheet Column Title

题目连接

https://leetcode.com/problems/excel-sheet-column-title/ 

Excel Sheet Column Title

Description

Given a positive integer, return its corresponding column title as appear in an Excel sheet.

For example:

1 -> A
2 -> B
3 -> C
...
26 -> Z
27 -> AA
28 -> AB 

class Solution {
public:
	string convertToTitle(int n) {
		string ans = "";
		while (n) {
			char ch = !(n % 26) ? 'Z' : (n % 26 + 'A' - 1);
			ans += ch;
			n = (n - 1) / 26;
		}
		reverse(ans.begin(), ans.end());
		return ans;
	}
};