题解 | #人民币转换#

import java.util.Scanner;

public class Main {

    public static String[] ten = { "零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖" };
    public static String[] power = {"万", "亿"};

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner in = new Scanner(System.in);
        while (in.hasNext()) {
            String[] arr = in.nextLine().split("\\.");
            ;
            if (arr[1].equals("00")) {
                System.out.println("人民币" + solveBeforeDot(arr[0]) + "元整");
            } else if (arr[0].equals("0")) {
                System.out.println("人民币" + solveAfterDot(arr[1]));
            } else {
                System.out.println("人民币" + solveBeforeDot(arr[0]) + "元" + solveAfterDot(
                                       arr[1]));
            }

        }
    }

    public static String solveBeforeDot(String str) {
        int intPart = Integer.parseInt(str);

        StringBuilder sb = new StringBuilder();

        int pow = -1;
        while (intPart != 0) {

            if (pow != -1) {
                sb.append(power[pow]);
            }
            //sb.append(power[pow]);


            // less than 10000
            int small = intPart % 10000;
            int gewei = small % 10;
            int shiwei = small / 10 % 10;
            int baiwei = small / 100 % 10;
            int qianwei = small / 1000 % 10;

            if (gewei != 0) {
                sb.append(ten[gewei]);

            }

            if (shiwei != 0) {
                sb.append("拾");
                if (shiwei != 1) {
                    sb.append(ten[shiwei]);
                }
            } else {
                if (gewei != 0 && (small > 99 || intPart > 10000)) {
                    sb.append(ten[0]);
                }
            }

            if (baiwei != 0) {
                sb.append("佰");
                sb.append(ten[baiwei]);

            } else {
                if (shiwei != 0 && (small > 999 || intPart > 10000)) {
                    sb.append(ten[0]);
                }
            }

            if (qianwei != 0) {
                sb.append("仟");
                sb.append(ten[qianwei]);

            } else {
                if (baiwei != 0 && (intPart > 10000)) {
                    sb.append(ten[0]);
                }
            }
            intPart /= 10000;

            pow++;
            if (pow > 1) pow = 0;

        }

        return sb.reverse().toString();

    }

    public static String solveAfterDot(String str) {
        StringBuilder sb = new StringBuilder();
        int jiao = Integer.parseInt(str.substring(0, 1));
        int fen = Integer.parseInt(str.substring(1));
        ;

        if (jiao != 0) {
            sb.append(ten[jiao] + "角");
        }
        if (fen != 0) {
            sb.append(ten[fen] + "分");
        }
        return sb.toString();
    }

}