幫我看一下哪里不對，輸出是對的
public class HelloWorld{
public static void main(String[] args){
int num = 999;
int count = 0;
int b=1;
for (int i=1;i<10;i++){
b*=10;
if (num<b){
??? System.out.println("它是個"+i+"位的數(shù)!");
??? break;
}
}
}
}
慕尼黑7551879
2017-05-18
2 回答
舉報
0/150
提交
取消
2017-05-18
public class Imooc4 {
?public static void main(String[] args) {
??int num = 999;
??int count = 0;
??if (num >= 0 && num <= 99999) {
???while (num != 0) {
????count++;
????num /= 10;
???}
???System.out.println("它是個" + count + "位的數(shù)！");
??}
?}
}
//不需要定義那么多變量
2017-05-18
你都定義num，count，還去定義b和i干嘛？