java - 显示变更需求信息

Question

我需要编写一个 java 程序来计算销售交易的账单和找零。

它只能分配 20 枚、10 枚、5 枚、1 枚、25 分硬币、10 枚硬币、5 枚硬币和 1 便士硬币。

如果它不需要分配面额(假设您的零钱是 50 美分，它应该只分配两个 25 美分。它应该不提及其他货币)

我无法让它分配正确数量的货币，它只是分配所有货币(例如，如果是 21 美元，我给收银员 22，代码告诉我给 0.013 20 美元，0.294 10 美元，等等。) 如果有人能帮助我那就太好了。

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:

1. if 语句后有分号。这意味着始终执行大括号中的以下代码
2. 您似乎检查从 5 开始的余数是否大于 0，而不是 1。
3. 每个面额的输出是除法的结果，可能是小数。您需要输出它的下限。