import java.util.*;
public class Egg {
public static int recursion(int n) {
if (n < 10) {
return 1;
}
int last = n / 10;
return 1 + recursion(last);
}
public static void main(String[] args) {
Scanner scan = new Scanner(System. in );
System.out.print("输入任意一个
正整数: ");
int n = scan.nextInt();
scan.close();
System.out.println(n + " 的位数是:" + recursion(n));
}
}