import java.util.Random;
public class Main {
public static void main(String[] args) {
Random r = new Random();
int a = r.nextInt(10000);
System.out.println("输入:"+a);
String s = way(a);
System.out.println("输出:"+s);
}
public static String way(int num) {
String s = "";
if (num < 10) {
return num + s;
} else {
return s + way(num % 10) + way(num / 10);
}
}
}
//举例最小的倒序数字10;
//先得到十位和个位上的数字(十位/10,个位%10);
//然后用字符串把它们串起来,不断递归调用它们本身;