leetcode(168)Excel Sheet Column Title 简单题

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

Credits:

Special thanks to @ifanchu for
adding this problem and creating all test cases.

 

Excel序是这样的：A~Z, AA~ZZ, AAA~ZZZ, ……

给你一个数n，输出相应的字符串

一开始还想写个函数模拟下字符串的加1操作

后来发现这题目就是 10进制数转26进制数

class Solution {
public:
string convertToTitle(int n) {
string ret = "";
while(n)
{
ret = (char)((n-1)%26+'A') + ret;
n = (n-1)/26;
}
return ret;
}
};