LeetCode:Excel Sheet Column Number

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 

Credits:

Special thanks to @ts for adding this problem and creating all test cases.

用c++解决，

class Solution {public:    int titleToNumber(string s) {        int value;        for (int i=0; i<s.length(); i++) {            value+=s[i]-'A'+1;        }        return value;    }};