public class HelloWorld{
public static void main(String[] args){
int num = 999;
int count = 0;
if (num>0&&num<=999999999)
?{?? while(num!=0)
??? { count++;num/10;}
??? System.out.println("它是個(gè)"+count+"位的數(shù)!");
?}
else
?{ System.out.println("cuowu");
?}

}
}

//它說error:?not?a?statement

????{?count++;num/10;}

?????????????????^

1?error怎么回事啊