1 class Solution { 2 public: 3 int titleToNumber(string s) { 4 int n=s.size(),i; 5 int ans=0; 6 for(i=0;i<n;i++) 7 { 8 ans=ans*26+s[i]-‘A‘+1; 9 } 10 return ans; 11 } 12 };
Excel Sheet Column Number
原文：http://www.cnblogs.com/varcom/p/4567253.html
