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Question

我需要写一个java程序来计算什么账单和零钱将被给予销售交易。

它只能分发20美元、10美元、5美元、1美元、25美分、1美分、10美分、5美分和1美分。

如果它不需要分发面额(假设您的零钱是50美分，它应该只分发两个25美分)。它不应该提到其他货币)

我不能让它分配正确的货币数量，它只是分配所有的货币(例如，如果是21美元，我给了收银员22美元，代码告诉我给.013 20美元，.294 10美元，等等)。如果有人能帮我，那就太好了。

double price;  // declares how much the price is
double moneyGiven; // declares how much money the cashier is given
int change; // declares how much change is given in return

System.out.println("Enter the Price of the item:");
price = IO.readDouble()*100; 
{
    {
        System.out.println("Enter the Amount Given:");
        moneyGiven = IO.readDouble()*100; 
        {
            if (moneyGiven > price) 
                System.out.println("Your Change is:");

            change = moneyGiven - price;
            int twenties = change / 2000;
            if (twenties >= 1) {
                change = change % 2000;
                System.out.println(twenties + "$20 Bills"); 
            }

            int tens = change / 1000;
            if (tens >= 1) {
                change = change % 1000;
                System.out.println(tens + "$10 Bills"); 
            }

            int fives = change / 500;
            if (fives >= 1) {
                change = change % 500;
                System.out.println(fives + "$5 Bills"); 
            }

            int ones = change / 100;
            if (ones >= 1) {
                change = change % 100;
                System.out.println(ones + "$1 Bills"); 
            }

            int quarters = change / 25;
            if (quarters >= 1) {
                change = change % 25;
                System.out.println(quarters + "Quarters"); 
            }

            int dimes = change / 10;
            if (dimes >= 1) {
                change = change % 10;
                System.out.println(dimes + "Dimes"); 
            }

            int nickles = change / 5;
            if (nickles >= 1) {
                change = change % 5;
                System.out.println(nickles + "Nickles"); 
            }

            int pennies = change / 1;
            if (pennies >= 1) {
                change = change % 1;
                System.out.println(pennies + "Pennies"); 
            }




            if (moneyGiven <= price) 
                System.out.println("Not enough!");

            if (moneyGiven == price) 
                System.out.println("There is no Change to be given.");

        }
    }
}
}
}

Answer 1

这里有一些错误的地方：

1. 在你的if语句后面有分号。这将意味着以下大括号中的代码总是被执行，你似乎会检查从5开始的余数是否大于0，而不是1。
2. ，你为每个面额输出的是除法的结果，可能是一个小数。你需要输出这个的地板。

Answer 2

我相信我找到了答案，但它返回的答案是十进制的答案，即。1.0、5.0。如果没有.0，我如何让它返回答案？但是，我希望在我的代码中有任何输入：

    double price;  // declares how much the price is
    double moneyGiven; // declares how much money the cashier is given
    double change; // declares how much change is given in return

    System.out.println("Enter the Price of the item:");
    price = IO.readDouble()*100; {


    {


    System.out.println("Enter the Amount Given:");
    moneyGiven = IO.readDouble()*100; {




    if (moneyGiven > price) 


    System.out.println("Your Change is:");

    change = moneyGiven - price;
    double twenties = change / 2000;
    if (twenties >= 1) {
    change = change % 2000;
    System.out.println(Math.floor(twenties) + "$20 Bills"); }

    double tens = change / 1000;
    if (tens >= 1) {
    change = change % 1000;
    System.out.println(Math.floor(tens) + "$10 Bills"); }

    double fives = change / 500;
    if (fives >= 1) {
    change = change % 500;
    System.out.println(Math.floor(fives) + "$5 Bills"); }

    double ones = change / 100;
    if (ones >= 1) {
    change = change % 100;
    System.out.println(Math.floor(ones) + "$1 Bills"); }

    double quarters = change / 25;
    if (quarters >= 1) {
    change = change % 25;
    System.out.println(Math.floor(quarters) + "Quarters"); }

    double dimes = change / 10;
    if (dimes >= 1) {
    change = change % 10;
    System.out.println(Math.floor(dimes) + "Dimes"); }

    double nickles = change / 5;
    if (nickles >= 1) {
    change = change % 5;
    System.out.println(Math.floor(nickles) + "Nickles"); }

    double pennies = change / 1;
    if (pennies >= 1) {
    change = change % 1;
    System.out.println(Math.floor(pennies) + "Pennies"); }




    if (moneyGiven <= price) 
    System.out.println("Not enough!");

    if (moneyGiven == price) 
    System.out.println("There is no Change to be given.");

    }
        }
    }
    }

}