个回答

• 清醒着沉沦

  2022-08-23 21:29:16

  public class HelloWorld{

  public static void main(String[] args){

  int num = -999;

  int count = 0;

  if(num >=0 && num <1000000000)

  {

      while(num!=0)

      {

          count++;

          num = num/10;

      }

      System.out.println("它是个"+count+"位的数");

  }else{

  System.out.println("请输入一个大于0的数且小于10位的数");}

  }

  }

  0