[编程入门]数字的处理与判断-题解(Java代码)

import java.util.Scanner;

public class Main {

public static void main(String[] args) {
    // TODO Auto-generated method stub

Scanner sc=new Scanner(System.in);
String y;
y=sc.next();

int[]x=new int[y.length()];
for (int a = 0; a < y.length(); a++) {
//substring是找出包含起始位置，不包含结束位置，到结束位置的前一位的子串
x[a] = Integer.parseInt(y.substring(a, a + 1));

}

System.out.println(x.length);
for(int j=0;j<x.length;j++){
if(j==x.length-1){
System.out.print(x[j]);
}else{
System.out.print(x[j]+” “);
}

}
System.out.println();
for(int k=x.length-1;k!=-1;k—){
System.out.print(x[k]);
}
}

}