LeetCode 171. 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 -> 1B -> 2C -> 3...Z -> 26AA -> 27AB -> 28 

• 题解：联想一下把它作为26进制去算就好了。

class Solution {public:    int titleToNumber(string s) {        int count=0;        for(int i=0;i<s.length();i++){            count+=((s[i]-'A'+1)*(pow(26,s.length()-1-i)));        }        return count;    }};