PAT Basic Level 1002 写出这个数

import java.util.Scanner;

/**
 * author:djch
 * date:2021/5/21
 **/
public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Integer count = 0;
        String s = scanner.nextLine();
        for(int i = 0;i<s.length();i++){
            count+= s.charAt(i)-'0'; //取得0-9数字
        }

        StringBuilder sb = new StringBuilder();// 使用StringBuilder插入文本
        while(count!=0){
            switch (count%10){
                case 0:
                    sb.insert(0,"ling");
                    break;
                case 1:
                    sb.insert(0,"yi");
                    break;
                case 2:
                    sb.insert(0,"er");
                    break;
                case 3:
                    sb.insert(0,"san");
                    break;
                case 4:
                    sb.insert(0,"si");
                    break;
                case 5:
                    sb.insert(0,"wu");
                    break;
                case 6:
                    sb.insert(0,"liu");
                    break;
                case 7:
                    sb.insert(0,"qi");
                    break;
                case 8:
                    sb.insert(0,"ba");
                    break;
                case 9:
                    sb.insert(0,"jiu");
                    break;
                default:
                    throw new IllegalStateException("Unexpected value: " + count % 10);
            }
            if(count/10!=0){sb.insert(0," ");} //加上空格
            count/=10;
        }
        System.out.println(sb);
    }
}