字符串反转

import java.util.*;
public class Main{
    public static void main(String[] args){
        Scanner sc=new Scanner(System.in);
        while(sc.hasNext()){
            String s=sc.next();
            char[] arr=s.toCharArray();  //将字符串转换为charshu
            for(int i=arr.length-1;i>=0;i++){
                System.out.print(arr[i]);
            }
        }
    }
}