Java£ºJavaÇóÒ»¸öÕûÐÎÊý×ֵij¤¶È

        Scanner sca = new Scanner(System.in);
        int num = sca.nextInt();
        int len = (num+"").length();
        System.out.println(len);

ÔËÐнá¹ûÈçÏÂ：