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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
简单题，相当于26进制
class Solution { public: int titleToNumber(string s) { int length = s.length(); int res = 0; for(int i = 0; i < length; ++i){ res = res * 26 +charToInt(s[i]); } return res; } int charToInt(char c){ return (c - ‘A‘ + 1); } };
【LeetCode】171. Excel Sheet Column Number 解题小结
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原文地址：http://www.cnblogs.com/Doctengineer/p/5860984.html
