Question

我想写一个程序，它接受用户输入的价格，他们支付的金额以及他们的变化。我还希望程序指定硬币和纸币的更改。

我认为我非常接近，但是当我运行程序时，我只需要获得0金币和应付票据。

我不是在找人为我编写程序，我只需要知道我做错了什么，毫无疑问这是我忽略的一些简单但我无法理解的它出来了。

这是我到目前为止所做的事情，我知道它不是很漂亮，但随着我变得更有经验，我会继续努力。

感谢。

Scanner cashregister = new Scanner(System.in);

    System.out.println("Thank you for your purchase!");


    int amountDue = 0, amountPaid = 0, changeDue = 0;


    int fiftyEuro = 5000;

    int twentyEuro = 2000;

    int tenner = 1000;

    int fiver = 500;

    int two = 200;

    int one = 100;

    int fiftyCent = 50;

    int twentyCent = 20;

    int tenCent = 10;

    int fiveCent = 5;

    int twoCent = 2;

    int oneCent = 1;



    fiftyEuro = changeDue / 5000;

    changeDue = changeDue %= 5000;


    twentyEuro = changeDue / 2000;

    changeDue = changeDue %= 2000;


    tenner = changeDue / 1000;

    changeDue = changeDue %= 1000;


    fiver = changeDue / 500;

    changeDue = changeDue %= 500;


    two = changeDue / 200;

    changeDue = changeDue %= 200;


    one = changeDue / 100;

    changeDue = changeDue %= 100;


    fiftyCent = changeDue / 50;

    changeDue = changeDue %= 50;


    twentyCent = changeDue / 20;

    changeDue = changeDue %= 20;


    tenCent = changeDue / 10;

    changeDue = changeDue %= 10;


    fiveCent = changeDue / 5;

    changeDue = changeDue %= 5;


    twoCent = changeDue / 2;

    changeDue = changeDue %= 2;


    oneCent = changeDue / 1;

    changeDue = changeDue %= 1;


    if (amountDue > amountPaid)

        System.out.println("\nThe amount due must be less then or equal to the amount you are paying");


    System.out.println("\nThe amount due, in cents: ");

    amountDue = cashregister.nextInt();


    System.out.println("\nThe amount paid, in cents: ");

    amountPaid = cashregister.nextInt();

    changeDue = amountPaid - amountDue;


    System.out.println("\nYour change, in cents is: " + changeDue);


    System.out.println("\nThe change for " + changeDue + " is: ");


    System.out.println(fiftyEuro + "   \u20ac" + "50"); //€50 notes due

    System.out.println(twentyEuro + "   \u20ac" + "20"); //€20 notes due

    System.out.println(tenner + "   \u20ac" + "10"); //€10 notes due

    System.out.println(fiver + "   \u20ac" + "5"); //€5 notes due

    System.out.println(two + "   \u20ac" + "2"); //€2 coins due

    System.out.println(one + "   \u20ac" + "1"); //€1 coins due

    System.out.println(fiftyCent + "   50" + "c"); //50c coins due

    System.out.println(twentyCent + "   20" + "c"); //20c coins due

    System.out.println(tenCent + "   10" + "c"); //10c coins due

    System.out.println(fiveCent + "   5" + "c"); //5c coins due

    System.out.println(twoCent + "   2" + "c"); //2c coins due

    System.out.println(oneCent + "   1" + "c"); //1c coins due


    cashregister.close();

    return;

}

}

以下是我输出的示例

感谢您的购买！

应付金额，以美分计： 2450

支付的金额，以美分为单位： 5000

您的更改，以美分为：2550

2550的变化是： 0€50 0€20 0€10 0€5 0€2 0€1 0 50c 0 20c 0 10c 0 5c 0 2c 0 1c

正如您所看到的那样，它并没有说出客户应该得到多少钞票/硬币。

Answer 1

在

之后移动这些代码

    fiftyEuro = changeDue / 5000;
    changeDue = changeDue %= 5000;
    twentyEuro = changeDue / 2000;
    changeDue = changeDue %= 2000;
    tenner = changeDue / 1000;
    changeDue = changeDue %= 1000;
    fiver = changeDue / 500;
    changeDue = changeDue %= 500;
    two = changeDue / 200;
    changeDue = changeDue %= 200;
    one = changeDue / 100;
    changeDue = changeDue %= 100;
    fiftyCent = changeDue / 50;
    changeDue = changeDue %= 50;
    twentyCent = changeDue / 20;
    changeDue = changeDue %= 20;
    tenCent = changeDue / 10;
    changeDue = changeDue %= 10;
    fiveCent = changeDue / 5;
    changeDue = changeDue %= 5;
    twoCent = changeDue / 2;
    changeDue = changeDue %= 2;
    oneCent = changeDue / 1;
    changeDue = changeDue %= 1;

这些行之后..

    System.out.println("\nThe amount paid, in cents: ");
    amountPaid = cashregister.nextInt();
    changeDue = amountPaid - amountDue;

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