public class HelloWorld{

public static void main(String[] args){

int num = 999;

int count = 0;

int j;

int i=100000000;

if (i>=0&&i<=999999999){

? for(;count>=9;count++){

? ? ?j=9-count;

? ? if(num/i != 0)

? ? ? ? System.out.println("它是個(gè)"+j+"位數(shù)");

? ? else

? ? i=i/10;

? }

}

else

System.out.println("錯(cuò)誤");

}

}