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
题目含义：给定一个int数，返回其代表的字符串，规则如上
1 public String convertToTitle(int n) { 2 String result = ""; 3 while (n > 0) { 4 result = (char) (‘A‘ + (n - 1) % 26) + result; 5 n = (n - 1) / 26; 6 } 7 return result; 8 }
原文：http://www.cnblogs.com/wzj4858/p/7701218.html