Java | Leetcode Java题解之第504题七进制数
题目：
题解：
class Solution {
public String convertToBase7(int num) {
if (num == 0) {
return "0";
}
boolean negative = num < 0;
num = Math.abs(num);
StringBuffer digits = new StringBuffer();
while (num > 0) {
digits.append(num % 7);
num /= 7;
}
if (negative) {
digits.append('-');
}
return digits.reverse().toString();
}
}