题解 | #人民币转换#

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        // while (in.hasNextInt()) { // 注意 while 处理多个 case
        //     int a = in.nextInt();
        //     int b = in.nextInt();
        //     System.out.println(a + b);
        // }
        String[] nums = {"零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖", "拾"};
        String[] units = {"元", "万", "亿"};
        String line = in.nextLine();
        String yuan = line.split("\\.")[0];
        int len = yuan.length();
        String jiaoFen = line.split("\\.")[1];
        int count = 0;
        String temp = yuan;
        String result = "";
        while (temp.length() > 0) {
            int tempLen = temp.length();
            if (tempLen > 4) {
                result = convert(temp.substring(tempLen - 4, tempLen), nums) + units[count++] + result;
            temp = temp.substring(0, tempLen - 4);
            } else {
                result = convert(temp, nums) + units[count++] + result;
                temp = "";
            }
        }
        result.replaceAll("零零", "零");
        if (result.startsWith("零")) {
            result = result.substring(1);
        }
        if (jiaoFen.charAt(0) != '0') {
            result = result + nums[jiaoFen.charAt(0) - '0'] + "角";
        }
        if (jiaoFen.charAt(1) != '0') {
            result = result + nums[jiaoFen.charAt(1) - '0'] + "分";
        }
        if (Long.parseLong(yuan) == 0) {
            result = result.substring(1);
        }
        System.out.print("人民币" + result);
    }
    private static String convert(String str, String[] nums) {
        if ("0000".equals(str)) {
            return "";
        }
        int len = str.length();
        int n = Integer.parseInt(str);
        int ge = n % 10;
        int shi = (n / 10) % 10;
        int bai = (n / 100 % 10);
        int qian = n / 1000;
        
        String result = "";
        if (qian != 0) {
            result = nums[qian] + "仟";
        } else {
            result = "零";
        }
        if (bai != 0) {
            result = result + nums[bai] + "佰";
        } else if (bai == 0 && qian != 0) {
            result = result + "零";
        }
        if (shi != 0) {
            if (shi == 1) {
                result = result + "拾";
            } else {
                result = result + nums[shi] + "拾";
            }
        } else if (shi == 0 && bai != 0) {
            result = result + "零";
        }
        if (ge != 0) {
            result = result + nums[ge];
        }
        return result;
    }
}