【LeetCode】168. Excel Sheet Column Title 解题小结

题目：

Given a 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 

简单题

class Solution {
public:
    string convertToTitle(int n) {
        string str;
        char c;
        int num;
        while (n > 0){
            c = (n-1)%26 + ‘A‘;
            str = c + str;
            n = (n-1)/ 26;
        }

        return str;
    }
};