怎么回事啊，求助
public class HelloWorld{
public static void main(String[] args){
int num = 999;
int count = 0;
if (num>0&&num<=999999999)
{ while(num!=0)
{ count++;num/10;}
System.out.println("它是个"+count+"位的数!");
}
else
{ System.out.println("cuowu");
}
}
}
//它说error: not a statement
{ count++;num/10;}
^
1 error怎么回事啊
