変更量の計算

Question

私はJavaのnoobです。私は2ドルの入力を与えられた変更量を与えるプログラムを書こうとしています。私は何が起こっているのか理解できません。私は特に硬貨を出力しようとするのに困っています。例えば、654.32ドルを支払って987ドルを支払った場合、その変更は332.68ドル、2クォート、1デイム、1ニッケル、3ピンニーになります。

すべてのヘルプは大歓迎です！

import java.util.*; 
import java.math.*; 
import java.text.*; 


public class CorrectChange { 

    public static void main(String[] args) { 

     Scanner input = new Scanner(System.in); 

     BigDecimal AmtDue;  
     BigDecimal AmtPaid; 


     NumberFormat n = NumberFormat.getCurrencyInstance(Locale.US); 

     //User enters the amount that the customer owes 
     System.out.println("Enter the amount below that is due to be paid."); 
     System.out.print("$"); 
      AmtDue = input.nextBigDecimal(); 

      //Converts user's input into the currency format 
      AmtDue = AmtDue.setScale(2, BigDecimal.ROUND_HALF_UP); 
       double dAmtDue = AmtDue.doubleValue(); 
        String eAmtDue = n.format(dAmtDue); 

     //User enters the amount that the customer paid  
     System.out.println("Enter the amount below that has been paid."); 
     System.out.print("$"); 
      AmtPaid = input.nextBigDecimal(); 

      //Converts user's input into the currency format 
      AmtPaid = AmtPaid.setScale(2, BigDecimal.ROUND_HALF_UP); 
       double dAmtPaid = AmtPaid.doubleValue(); 
        String eAmtPaid = n.format(dAmtPaid); 

      //Checks to see if the amount paid is more than the amount owed 
      if (AmtDue.compareTo(AmtPaid)> 0){ 
       double dBal = AmtDue.subtract(AmtPaid).doubleValue(); 
       String eBal = n.format(dBal); 
       System.out.println("You still owe: " + eBal.toString()); 
      } 

      //Checks to see if the amount owed is more than the amount paid 
      if (AmtDue.compareTo(AmtPaid)< 0){ 
       int cBal = (AmtPaid.compareTo(AmtDue)*100); 
       double dBal = AmtPaid.subtract(AmtDue).doubleValue(); 
       String eBal = n.format(dBal); 


        int DolBills = (int) (dBal/1); 
        dBal = dBal % 1; 

        int quarters = (int) (dBal/25); 
        dBal = dBal % 25; 

        int dimes = (int) (cBal/10); 
        cBal = cBal % 10; 

        int nickles = (int) (cBal/5); 
        cBal = cBal % 5; 

        //pennies = (int) (dBal/100); 
        //dBal = dBal % 100; 

       System.out.println("You owe a balance of " + eAmtDue.toString() + ". Since you paid the amount of " + eAmtPaid.toString() + " your change is " + eBal.toString()); 
       System.out.println("Your change amount is as follows:\n" + 
        "\t" + DolBills + " $1 dollar bills \n" + 
        "\t" + quarters + " quarters \n" + 
        "\t" + dimes + " dimes \n" + 
        "\t" + nickles + " nickels \n"); 
        "\t" + numPennies + " pennies"; 

      } 

      //Checks to see if the amount paid is equal to the amount owed 
      if (AmtDue.compareTo(AmtPaid)== 0){ 
        System.out.println("Your balance has been paid. Thank you for your business."); 
      } 


    } 

Answer 1

あなたはほぼそこにいたので、cBalとdBalがちょっと混じっています。また、変更を.XX値に変換します。

正しいバージョンは、あなたは間違いなく、Javaの命名とコーディング規則上に読んでください

import java.util.*; 
import java.math.*; 
import java.text.*; 


public class CorrectChange { 

    public static void main(String[] args) { 

     Scanner input = new Scanner(System.in); 

     BigDecimal AmtDue;  
     BigDecimal AmtPaid; 


     NumberFormat n = NumberFormat.getCurrencyInstance(Locale.US); 

     //User enters the amount that the customer owes 
     System.out.println("Enter the amount below that is due to be paid."); 
     System.out.print("$"); 
      AmtDue = input.nextBigDecimal(); 

      //Converts user's input into the currency format 
      AmtDue = AmtDue.setScale(2, BigDecimal.ROUND_HALF_UP); 
       double dAmtDue = AmtDue.doubleValue(); 
        String eAmtDue = n.format(dAmtDue); 

     //User enters the amount that the customer paid  
     System.out.println("Enter the amount below that has been paid."); 
     System.out.print("$"); 
      AmtPaid = input.nextBigDecimal(); 

      //Converts user's input into the currency format 
      AmtPaid = AmtPaid.setScale(2, BigDecimal.ROUND_HALF_UP); 
       double dAmtPaid = AmtPaid.doubleValue(); 
        String eAmtPaid = n.format(dAmtPaid); 

      //Checks to see if the amount paid is more than the amount owed 
      if (AmtDue.compareTo(AmtPaid)> 0){ 
       double dBal = AmtDue.subtract(AmtPaid).doubleValue(); 
       String eBal = n.format(dBal); 
       System.out.println("You still owe: " + eBal.toString()); 
      } 

      //Checks to see if the amount owed is more than the amount paid 
      if (AmtDue.compareTo(AmtPaid)< 0){ 
       double dBal = AmtPaid.subtract(AmtDue).doubleValue(); 
       String eBal = n.format(dBal); 


        int DolBills = (int) (dBal/1); 
        dBal = dBal % 1.0; 

        int quarters = (int) (dBal/.25); 
        dBal = dBal % .25; 

        int dimes = (int) (dBal/.10); 
        dBal = dBal % .10; 

        int nickles = (int) (dBal/.05); 
        dBal = dBal % .05; 

        int numPennies = (int) (dBal/.01); 
        //dBal = dBal % 0.01; 

       System.out.println("You owe a balance of " + eAmtDue.toString() + ". Since you paid the amount of " + eAmtPaid.toString() + " your change is " + eBal.toString()); 
       System.out.println("Your change amount is as follows:\n" + 
        "\t" + DolBills + " $1 dollar bills \n" + 
        "\t" + quarters + " quarters \n" + 
        "\t" + dimes + " dimes \n" + 
        "\t" + nickles + " nickels \n" + 
        "\t" + numPennies + " pennies"); 

      } 

      //Checks to see if the amount paid is equal to the amount owed 
      if (AmtDue.compareTo(AmtPaid)== 0){ 
        System.out.println("Your balance has been paid. Thank you for your business."); 
      } 

    } 
    } 

を下回っています。