运行成功输出错误在哪里
public class HelloWorld{ public static void main(String[] args){ int num = 999; int count = 0; if(num>=0&&num<99999999){ while(num!=0){ count++; num=num/10; } System.out.println("它是个"+count+"位的数!"); }else{ System.out.println("输入有误"); } } } 运行成功输出错误是怎么回事啊
