【leetcode】Excel Sheet Column Title

Excel Sheet Column Title

Given a non-zero positive integer, return its corresponding column title as appear in an Excel sheet.

For example:

    1 -> A
    2 -> B
    3 -> C
    ...
    26 -> Z
    27 -> AA
    28 -> AB 

类似于数制转换，只不过1对应A，而不是0对应A

class Solution {
public:
    string convertToTitle(int n) {
        
        string res="";
        
        while(n>0)
        {
            int tmp=(n-1)%26;
            res.push_back('A'+tmp);

            n=(n-1)/26;
        }
        
        string result(res.rbegin(),res.rend());
        return result;
    }
};