QUESTION
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
FIRST TRY
string与数字的转换要借助char
class Solution { public: int titleToNumber(string s) { int ret = 0; char ch; for(int i = 0; i < s.length(); i++) { ch = s[i]; //string to char ret = ret*26 + ch - ‘A‘ + 1; } return ret; } };
Excel Sheet Column Number(STRING-TYPE CONVERTION)
原文：http://www.cnblogs.com/qionglouyuyu/p/4199709.html