运行成功,我感觉输出也对啊,为什么显示输出错误
public class HelloWorld{
public static void main(String[] args){
int num = 999;
int count = 0;
if(num>=0&&num<=999999999)
{for(int a=num;a!=0;a/=10)
{count++;}
System.out.println("它是个"+count+"位的数!");}
else System.out.println("输入错误");
}
}
