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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
Credits:
Special thanks to @ifanchu for adding this problem and creating all test cases.
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解法：和Excel Sheet Column Number相反，这次是10进制转26进制。从低位往高位求，每进一位，则把原数缩小26倍，再对26取余，之后减去余数，再缩小26倍，以此类推，可以求出各个位置上的字母。最后只需将整个字符串翻转一下即可。
class Solution { public: string convertToTitle(int n) { string res = ""; while (n > 0) { int rem = n % 26; if (rem == 0) { res += "Z"; n -= 26; } else { res += (char)(rem - 1 + ‘A‘); n -= rem; } n /= 26; } reverse(res.begin(), res.end()); return res; } };
[LeetCode]62. Excel Sheet Column Title Excel列序号
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原文地址：http://www.cnblogs.com/aprilcheny/p/4943404.html
