标签：
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
Credits:
Special thanks to @ts for adding this problem and creating all test cases.
Math
#include <iostream> #include <string> using namespace std; class Solution { public: int titleToNumber(string s) { int n = s.length(); if(n<1) return 0; int seed =1; int sum = 0; for(int i = n-1;i>=0;i--){ sum += (s[i]-‘A‘+1)*seed; seed*=26; } return sum; } }; int main() { string s="AAA"; Solution sol; cout<<sol.titleToNumber(s)<<endl; return 0; }
[LeetCode] Excel Sheet Column Number
标签：
原文地址：http://www.cnblogs.com/Azhu/p/4323509.html
