为麻过不了
public class HelloWorld{
public static void main(String[] args){
int num =999;
int count = 0;
if(num<=999999999){
while(num !=0){
count++;
num = num/10;
}
System.out.println("它是"+count +"位数");
}else{
System.out.println("大于10位数！");
}
}
}
