C++实现LeetCode(171.求Excel表列序号)

[LeetCode] 171.Excel Sheet Column Number 求Excel表列序号

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.

这题实际上相当于一种二十六进制转十进制的问题，并不难，只要一位一位的转换即可。代码如下：

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

到此这篇关于C++实现LeetCode(171.求Excel表列序号)的文章就介绍到这了,更多相关C++实现求Excel表列序号内容请搜索编程网以前的文章或继续浏览下面的相关文章希望大家以后多多支持编程网！