Calcul de la quantité de changement due

Question

Je suis noob à Java et j'essaye d'écrire un programme qui donne la quantité de changement donné deux entrées de dollar. Je ne peux pas comprendre ce qui se passe. J'ai particulièrement du mal à essayer de sortir la monnaie. Ainsi, par exemple, si une personne devait 654,32 $ et payait 987 $, son changement devrait être de 332,68 $, soit 2 trimestres, 1 pièce de dix cents, 1 pièce de nickel et 3 pièces de monnaie.

Toute aide est grandement appréciée!

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

Vous étiez presque là, vous avez un peu mélangé avec cBal et dBal. Et la conversion du changement à leur valeur .XX.

La version correcte est inférieure à

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."); 
      } 

    } 
    } 

Vous devriez lire définitivement sur le nommage Java et les conventions de codage.