import java.util.Scanner;

public class HelloWorld {

? ? public static void main(String[] args)

{

Scanner scan=new Scanner(System.in);

System.out.println("請輸入數(shù)字");

int num=scan.nextInt();

int count = 0;

? ?for(int i=1000000000;i>0;)

{ ??

? ?

? ?if(num/i>0)

? ?{

? ? ? ?count++;

? ?}i=i/10;

}System.out.println("它是個"+count+"位的數(shù)");

}

}