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
1 public class Solution { 2 public String convertToTitle(int n) { 3 String ret=""; 4 5 while (n>0) { 6 n--; 7 char letter=(char) (n%26+‘A‘); 8 ret=letter+ret; 9 n=n/26; 10 } 11 12 return ret; 13 14 } 15 }
LeetCode Excel Sheet Column Title
原文：http://www.cnblogs.com/birdhack/p/4178969.html