哪里錯了啊
public class HelloWorld{
public static void main(String[] args){
int num = 999;
int count = 0;
if(num != 0 && num >= 999999999);{
while(num != 0){
? ? num = num / 10;
? ? count++;
}
System.out.println("它是個"+ count + "位的數！");
} else{
System.out.println("輸入有誤！");
}
}
}
2020-04-08
正確代碼
public?class?HelloWorld{ ????public?static?void?main(String[]?args){ ????????int?num?=?999; ????????int?count?=?0; ????????if(num?!=?0?&&?num?<=?999999999){ ????????????while(num?!=?0){ ????????????????num?=?num?/?10; ????????????????count++; ????????????} ????????????System.out.println("它是個"+?count?+?"位的數！"); ????????}?else{ ????????????System.out.println("輸入有誤！"); ????????} ????} }2020-05-05
if(num>=0&&num<=999999999){}
2020-04-16
int num = 999;
? ? int count = 0;
? ? for(int i=1;i<100;i++){
? ? ? ? ++count;
? ? ? ? if(num<10){
? ? ? ? ? ? System.out.println("它是個"+count+"位的數！");
? ? ? ? ? ? break;
? ? ? ? }
? ? ? ? num = num/10;
? ? }