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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
Solution：26进制转十进制,AAA=27*26+1
1 class Solution { 2 public: 3 int titleToNumber(string s) { //runtime:8ms 4 int ret=0; 5 for(int i=0;i<s.size();i++)ret = ret*26+s[i]-‘A‘+1; 6 return ret; 7 } 8 };
【LeetCode】171 - Excel Sheet Column Number
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原文地址：http://www.cnblogs.com/irun/p/4709390.html
