168.Excel Sheet Column Title

Excel Sheet Column Title

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 

注意：由于下标从1开始而不是从0开始，因此要减一操作。

static public string ConvertToTitle(int n) {
	string s = "";
	char c = ‘ ‘;
	while (n > 0) {
		int num = (n - 1) % 26;
		c = Convert.ToChar(num + 65);
		s = c + s;
		n = (n - 1) / 26;
	}
	return s;
}

来自为知笔记(Wiz)