public?class?HelloWorld{
public?static?void?main(String[]?args){
int?num?=?999;
int?count?=?0;
if(num<1e10){
????while(num>=1){
????????num/=10;
????????count++;
????}
????System.out.println("它是個(gè)"+count+"位的數(shù)!");
}
}
}

為什么慕課網(wǎng)上要報(bào)錯(cuò)，我明明運(yùn)行結(jié)果就是對(duì)的??？