Question

我正在完成一项任务，而且我已经编写了大部分代码。该程序要求用户输入美元和美分的金额。然后，该计划将把金额分成不同的面额。我之前得到了它的工作，但在格式化我的打印语句并做了一些测试之后，我意识到没有为硬币打印的值。任何建议或意见将不胜感激。下面是我输出的代码。

import java.util.*;

public class BillBreaker {

    // Instantiate Scanner class for reading keyboard input
    public static Scanner kbd = new Scanner(System.in);

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        // instantiate Scanner class for reading keyboard input

        double orgAmount;
        int orgPennies; // pennies part of the amount
        int remPennies;
        long orgDollars;
        // variables for bills of denominations.
        long hundreds;
        int fifties, twenties, tens, fives, twos, ones;

        //variables for keeping track of coins
        int pennies, nickels, dimes, quarters;

        // print greeting and prompt user for input.
        System.out.println("Given an amount in dollars and cents, I will find");
        System.out.println("a combination of bills and coins:\n");
        System.out.println("Enter a dollar amount including cents.");

        // read amount of dollars and pennies.
        orgAmount = kbd.nextDouble();

        // printf is used to format user input into dollars and cents with comma delimiter
        System.out.printf("Amount you entered in Dollars and cents: $%,.2f\n  ",orgAmount);


        orgDollars = (long)orgAmount;
        System.out.printf("\nDollars Part of Original Amount: $%,d\n", orgDollars);

        //extract the pennies from in orgAmount
        orgPennies = (int)((orgAmount % 100));
        System.out.println("pennies part of orginal amount: " + orgPennies);

        //Extract and print the number of \$100 bills from the dollar amount. 
        //Reduce the dollar amount to account for \$100 bills
        hundreds = (long)orgAmount/100;
        orgAmount = orgAmount%100;
        System.out.printf ("Number of $100 bills: %,d\n",hundreds);

        //Extract and print the number of \$50 bills.  Reduce the dollar amount
        //to account for \$50 bills.
        fifties = (int)orgAmount/50;
        orgAmount = orgAmount%50;
        System.out.println ("Number of $50 bills: " + fifties);

        //Extract and print the number of \$20 bills.  Reduce the dollar amount
        //to account for \$20 bills.
        twenties = (int) orgAmount/20;
        orgAmount = orgAmount%20;
        System.out.println ("Number of $20 bills: " + twenties);

        //Extract and print the number of \$10 bills.  Reduce the dollar amount
        //to account for \$10 bills
        tens = (int) orgAmount/10;
        orgAmount = orgAmount%10;
        System.out.println ("Number of $10 bills: " + tens);

        //Extract and print the number of \$5 bills.  Reduce the dollar amount
        //to account for \$5 bills
        fives = (int) orgAmount/5;
        orgAmount = orgAmount%5;
        System.out.println ("Number of $5 bills: " + fives);

        //Extract and print the number of \$2 bills.  Reduce the dollar amount
        //to account for \$2 bills
        twos = (int) orgAmount/2;
        orgAmount = orgAmount%2;
        System.out.println ("Number of $2 bills: " + twos);

        //Extract and print the number of \$1 bills.  Reduce the dollar amount
        //to account for \$1 bills
        ones = (int) orgAmount/1;
        orgAmount = orgAmount%1;
        System.out.println ("Number of $1 bills: " + ones);

        //Extract and print the number of quarters from the number of pennies. 
        //Reduce the number of pennies to account for the quarters
        quarters = (int) (orgAmount/0.25);
        orgAmount = orgAmount%.25;
        System.out.println ("Number of Quarters: " + quarters);

        //Extract and print the number of dimes from the number of pennies. 
        //Reduce the number of pennies to account for the dimes
        dimes = (int) (orgAmount/0.10);
        orgAmount = orgAmount%.10;
        System.out.println ("Number of Dimes: " + dimes);

        //Extract and print the number of nickels from the number of pennies. 
        //Reduce the number of pennies to account for the nickels
        nickels = (int) (orgAmount/0.05);
        orgAmount = orgAmount%.05;
        System.out.println ("Number of Nickels: " + nickels);

        //Extract and print the number of pennies and terminate the program
        pennies = (int) (orgAmount/0.01);
        orgAmount = orgAmount%.01;
        System.out.println ("Number of Pennies: " + pennies);


    }

}

我的输出1：起始量：323.55 这使我在下面的前3个测试输出中得到了正确的数量。

Given an amount in dollars and cents, I will find
a combination of bills and coins:

Enter a dollar amount including cents.
323.55
Amount you entered in Dollars and cents: $323.55

Dollars Part of Original Amount: $323
pennies part of orginal amount: 23
Number of $100 bills: 3
Number of $50 bills: 0
Number of $20 bills: 1
Number of $10 bills: 0
Number of $5 bills: 0
Number of $2 bills: 1
Number of $1 bills: 1
Number of Quarters: 2
Number of Dimes: 0
Number of Nickels: 1
Number of Pennies: 0

输出2：开始金额：

Given an amount in dollars and cents, I will find
a combination of bills and coins:

Enter a dollar amount including cents.
2335.32
Amount you entered in Dollars and cents: $2,335.32

Dollars Part of Original Amount: $2,335
pennies part of orginal amount: 35
Number of $100 bills: 23
Number of $50 bills: 0
Number of $20 bills: 1
Number of $10 bills: 1
Number of $5 bills: 1
Number of $2 bills: 0
Number of $1 bills: 0
Number of Quarters: 1
Number of Dimes: 0
Number of Nickels: 1
Number of Pennies: 2

输出3：开始金额：9879823.92

Given an amount in dollars and cents, I will find
a combination of bills and coins:

Enter a dollar amount including cents.
9879823.92
Amount you entered in Dollars and cents: $9,879,823.92

Dollars Part of Original Amount: $9,879,823
pennies part of orginal amount: 23
Number of $100 bills: 98,798
Number of $50 bills: 0
Number of $20 bills: 1
Number of $10 bills: 0
Number of $5 bills: 0
Number of $2 bills: 1
Number of $1 bills: 1
Number of Quarters: 3
Number of Dimes: 1
Number of Nickels: 1
Number of Pennies: 1

然而，在一定数量的情况下，产量主要以便士的价格减少一个现在修改后的代码在变量启动期间发生了变化，但我不确定我是否理解是否需要使用orgPennies而不是所有的orgAmount？

这是错误输出，便士少了一个。

输出4：开始金额：111.11

Given an amount in dollars and cents, I will find
a combination of bills and coins:

Enter a dollar amount including cents.
111.11
Amount you entered in Dollars and cents: $111.11

Dollars Part of Original Amount: $111
pennies part of orginal amount: 11
Number of $100 bills: 1
Number of $50 bills: 0
Number of $20 bills: 0
Number of $10 bills: 1
Number of $5 bills: 0
Number of $2 bills: 0
Number of $1 bills: 1
Number of Quarters: 0
Number of Dimes: 1
Number of Nickels: 0
Number of Pennies: 0

也许我一直在看这个太长时间，需要离开一分钟。我确信它会非常明显，但同样，任何帮助都会受到赞赏。

Answer 1

        orgAmount = (long)orgAmount;
        System.out.printf("\nDollars Part of Original Amount: $%,.0f\n", orgAmount);

        //extract the pennies from in orgAmount
        orgPennies = (int)((orgAmount % 100) * 100);
        System.out.println("pennies part of orginal amount: " + orgPennies);

在尝试将值放入orgPennies之前，您似乎要从orgAmount中删除小数位值，而orgPennies不应该有“* 100”，然后您忘记使用orgPennies而不是orgAmount来计算数量便士。

Answer 2

您正在使用双倍来保存输入金额并进行计算。你不能指望精确到双分。你必须使用BigDecimal来持有大量资金。

这是我将你的双打更改为BigDecimals之后的测试运行。

%doctest_mode

以下是代码：

Given an amount in dollars and cents, I will find
a combination of bills and coins:

Enter a dollar amount including cents.
9879823.92
Amount you entered in Dollars and cents: $9,879,823.92

Dollars Part of Original Amount: $9,879,823
pennies part of orginal amount: 92
Number of $100 bills: 98,798
Number of $50 bills: 0
Number of $20 bills: 1
Number of $10 bills: 0
Number of $5 bills: 0
Number of $2 bills: 1
Number of $1 bills: 1
Number of Quarters: 3
Number of Dimes: 1
Number of Nickels: 1
Number of Pennies: 2

货币面额计划

2 个答案: