1 function printString(n){
2 let arr = [];
3 let i = 0;
4
5 // Step 1: Converting to number assuming
6 // 0 in number system
7 while (n) {
8 arr[i] = n % 26;
9 n = Math.floor(n / 26);
10 i++;
11 }
12
13 // Step 2: Getting rid of 0, as 0 is
14 // not part of number system
15 for (let j = 0; j < i - 1; j++) {
16 if (arr[j] <= 0) {
17 arr[j] += 26;
18 arr[j + 1] = arr[j + 1] - 1;
19 }
20 }
21 let ans = '';
22 for (let j = i; j >= 0; j--) {
23 if (arr[j] > 0)
24 ans += String.fromCharCode(65 + arr[j] - 1);
25 }
26
27 document.write(ans + "
");
28 }
29
printString(26);//Z
printString(51);//AY
printString(100);//CV
C#实现：
1 static string ColumnIndexToColumnLetter(int colIndex)
2 {
3 int div = colIndex;
4 string colLetter = String.Empty;
5 int mod = 0;
6
7 while (div > 0)
8 {
9 mod = (div - 1) % 26;
10 colLetter = (char)(65 + mod) + colLetter;
11 div = (int)((div - mod) / 26);
12 }
13 return colLetter;
14 }
string columnLetter = ColumnIndexToColumnLetter(100); // returns CV