递归 - 相反顺序的数字

Question

我需要实现一个递归方法printDigits,它以整数num作为参数,并以相反的顺序打印其数字,每行一位.

这是我到目前为止:

public class PrintDigits {

    public static void main(String[] args) {
        System.out.println("Reverse of no. is " + reversDigits(91));
    }

    /* Recursive function to reverse digits of num */
    public static int reversDigits(int number) {
        if (number == 0)
            return number;
        else {
            return number % 10;
        }
    }
}

我觉得我只缺少一行代码,但不确定我需要做些什么来修复它.

Answer 1

public static void main(String[] args) {
    reverseDigits(98198187);
}

/* Recursive function to reverse digits of num */
public static void reverseDigits(long number) {
    if (number < 10) {
        System.out.println(number);
        return;
    }
    else {
        System.out.println(number % 10);
        reverseDigits(number/10);
    }
}