[LeetCode]171.Excel Sheet Column Number

【题目】

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 

【分析】

可以看成是一道26进制转换为10进制的题目。

跟 [LeetCode]168.Excel Sheet Column Title是配套题目

【代码】

/*********************************
*   日期:2015-01-30
*   作者:SJF0115
*   题目: 171.Excel Sheet Column Number
*   网址:https://oj.leetcode.com/problems/excel-sheet-column-number/
*   结果:AC
*   来源:LeetCode
*   博客:
**********************************/
#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

class Solution {
public:
    int titleToNumber(string s) {
        int size = s.size();
        int result = 0;
        for(int i = 0;i < size;++i){
            result = result * 26 + (s[i] - 'A') + 1;
        }//for
        return result;
    }
};

int main(){
    Solution solution;
    string str("AAABA");
    int result = solution.titleToNumber(str);
    // 输出
    cout<<result<<endl;
    return 0;
}


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