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 


题目分析：处理26进制，逐个读入字符串的每一个字符进行处理转换，逐个移位；

java代码：

public class Solution {    public int titleToNumber(String s) {        int i=0;        int num=0;        while(i<s.length()){            if(s.charAt(i)!=‘Z‘){                num=num*26+s.charAt(i)-65+1;            }            else num=num*26+26;            i++;        }        return num;    }}

leetcode----------Excel Sheet Column Number