leetcode 171. Excel Sheet Column Number

给定字符串，A-Z代表1~26，转化为数字，AA表示27。

    int titleToNumber(string s) {
        int ret = 0;
        int size = s.size();
        
        for (int i = 0; i < size; i++) {
            ret *= 26;
            ret += s[i] - 'A' + 1;
        }
        return ret;
    }

 

转载于:https://www.cnblogs.com/willaty/p/8379716.html