public class HelloWorld{
public static void main(String[] args){
int num = 999;
int count=0;
switch(num/10)
{
??? case 0:
??????? System.out.println("它是個1位的數!");break;
??? case 1:
??????? System.out.println("它是個2位的數!");break;
??? case 2:
??????? System.out.println("它是個3位的數!");break;
??? case 3:
??????? System.out.println("它是個4位的數!");break;
??? case 4:
??????? System.out.println("它是個5位的數!");break;
??? case 5:
??????? System.out.println("它是個6位的數!");break;
??? case 6:
??????? System.out.println("它是個7位的數!");break;
??? case 7:
??????? System.out.println("它是個8位的數!");break;
??? case 9:
??????? System.out.println("它是個9位的數!");break;
???
}

}
}