[LeetCode]171. Excel Sheet Column Number

题目描述

思路

字符c 转 数字
c为A-Z
c - ‘A’ + 1

代码

#include<iostream>#include<string>using namespace std;class Solution {public:    int titleToNumber(string s) {        int res = 0;        for (int i = 0; i < s.size(); ++i) {            res += (s[i] - 'A' + 1) * pow(26, s.size() - 1 - i);        }        return res;    }};int main() {    Solution s;    cout << s.titleToNumber("AA") << endl;    system("pause");}