[雜亂筆記]小寫數字轉化爲大寫數字（小米OJ題與藍橋杯題）

小米OJ題目：原題點這裏

import java.util.*;
public class Main {
    public static void main(String args[]) {
        Scanner scan = new Scanner(System.in);
        String str;
        String[] num = {"零", "壹", "貳", "叄", "肆", "伍", "陸", "柒", "捌", "玖"};
        while (scan.hasNextLine()) {
            str = scan.nextLine().trim();
            if (str.equals("0")) {
                System.out.println("零元整");
                continue;
            }
            int len = str.length();
            String ans = "";
            for (int i = 0; i < len; i++) {
                int x = str.charAt(i) - '0';
                if ((len - i) % 4 == 0) {
                    if (x != 0) ans += num[x] + "仟";
                    else if (str.charAt(i + 1) != '0') ans += "零";
                }
                if ((len - i) % 4 == 1) {
                    if (x != 0) {
                        if ((len - i) == 1) ans += num[x];
                        else if ((len - i) == 5) ans += num[x] + "萬";
                        else if ((len - i) == 9) ans += num[x] + "億";
                    } else {
                        if ((len - i) == 5) ans += "萬";
                        else if ((len - i) == 9) ans += "億";
                    }
                }
                if ((len - i) % 4 == 2) {
                    if (x != 0) ans += num[x] + "拾";
                    else if (str.charAt(i + 1) != '0') ans += "零";
                }
                if ((len - i) % 4 == 3) {
                    if (x != 0) ans += num[x] + "佰";
                    else if (str.charAt(i + 1) != '0') ans += "零";
                }
            }
            
            ans = ans.replace("億萬","億");
            ans+="元整";
            System.out.println(ans);
        }
    }
}
            

藍橋杯基礎訓練題目：試題 基礎練習 數的讀法

這題目缺少一些比較特殊的測試數據，所以很敷衍都能AC了，如以下的代碼（如1000000就不行了）。暫時沒有找到好的辦法解決，由於yi（億）和yi（壹）同音，所以有點難搞，如果有大佬能解決的，跪求方法。

import java.io.BufferedWriter;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.util.*;
 
public class Main {
 
    static String [] num={"ling","yi","er","san","si","wu","liu","qi", "ba","jiu"};
    static String unit[]={"","","shi","bai","qian","wan","shi","bai","qian","yi","shi"};
    public  static  void main(String [] args){
        Scanner sc =new Scanner(System.in);
       String str = sc.next();
       int n = str.length();
       for(int i=0;i<n;i++){
           int x = str.charAt(i)-'0';
           if(x==0){
               if((n-i)==5||(n-i)==9){
                   System.out.print("shi"+" ");
               }
               if((n-i)!=1&&str.charAt(i+1)!='0'){
                   System.out.print("ling"+" ");
               }
           }else if((n==2||n==6||n==10)&&x==1&&i==0){
               System.out.print("shi"+" ");
           }else{
               System.out.print(num[x]+" "+unit[n-i]+" ");
           }
       }
   }
}