华为机试：字符逆序

 1 import java.util.Scanner;
 2 
 3 public class Main {
 4     
 5     public static void main(String[] args) {
 6         Scanner sc=new Scanner(System.in);
 7         while(sc.hasNext()){
 8             String s = sc.nextLine();
 9             for(int i = s.length() - 1; i >= 0; i--){
10                 System.out.print(s.charAt(i));
11             }
12             System.out.println();
13         }
14         sc.close();
15     }
16     
17 }