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Related to question Excel Sheet Column Title
Given a column title as appear in an Excel sheet, return its corresponding column number.
For example:
A -> 1
B -> 2
C -> 3
...
Z -> 26
AA -> 27
AB -> 28
Code:
public class Solution { public static int titleToNumber(String s) { if( s == null) return 0; int len = s.length(); int total = 0; for(int i=0;i<len;i++){ char x = s.charAt(i); total += Math.pow(26, len-1-i)*(x-64); } return total; } }
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原文地址：http://www.cnblogs.com/andrew-chen/p/4217095.html
