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
这道题非常之简单,比起原题来简单不少,非常直接,就是一个进制的问题。代码奉上
class Solution { public: int titleToNumber(string s) { if (s == "") return 0; int result = 0; int i = 0; while (s[i] != ‘\0‘) { result = result * 26 + (s[i]-‘A‘+1); i++; } return result; } };
习惯了字符串为空用s=="",实际上用s.empty()更为规范和合适一些。
时间: 2024-10-12 13:03:54