1009: [编程入门]数字的处理与判断基本解

解题思路:

注意事项:

参考代码:

public class Main {

public static void main(String[] args) {

Scanner scan = new Scanner(System.in);

String num = scan.next();

int id = num.length();

System.out.println(id);

for(int i = 0;i < num.length();i++) {

if(i!=num.length() - 1) {

char num1 = num.charAt(i);

System.out.print(num1+" ");

}else { 

char num2 = num.charAt(num.length() - 1); 

System.out.print(num2);

}

}

System.out.println();

for(int i = (num.length() - 1);i >= 0;i--) {

char num3 = num.charAt(i);

System.out.print(num3);

}

}

}