递归按顺序打印一个数
import java.util.Scanner;
public class Hello {
public static void main(String[] args) {
Scanner scan=new Scanner(System.in);
int n= scan.nextInt();
func(n);
// System.out.println(n%10);
}
public static void func(int n){
if(n<=9){
//一位数直接输出
System.out.print(n);
return;
}
func(n/10);
System.out.print(" "+(n%10));
}
}