輸入999，則輸出 “它是個3位的數！
怎么做?。?/p>
慕粉1013107715
2017-03-02
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怎么做?。?/p>
2017-03-02
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2017-03-02
public class HelloWorld {
?? ?public static void main(String[] agr) {
?? ??? ?int count = 0;
?? ??? ?Scanner scan = new Scanner(System.in);
?? ??? ?System.out.println("請輸入你要判斷的那個數：");
?? ??? ?int num = scan.nextInt();
?? ??? ?while(num!=0)
?? ??? ?{
?? ??? ???? num=num/10;
?? ??? ???? count++;
?? ??? ??? ?
?? ??? ??? ?
?? ??? ?}
?? ??? ?System.out.println("你輸入的那個數是："+count+"位數");
?? ?}
}
2017-03-02
int x = 999;
if(x > 100) {
System.out.print("它是個3位的數");
}