Question

我的C＃程序需要一些帮助。它应该询问在聚会中有多少人，然后用户输入他们的主菜价格，如果他们想要一杯饮料添加，然后打折。我遇到的问题是，如果我在聚会中不止一个并且他们都得到折扣，那么就不能给出正确的结果。这是我的代码。

class Program
{
    static void Main(string[] args)
    {
        int inParty = 0;
        int discoutSelection = 0;
        double entreeAmount = 0;
        int drinkSelection = 0;
        double drinkPrice = 1.25;
        double discount = 0;
        double orderAmount = 0;
        double tax = 0.07;
        double taxAmount = 0;
        double finalTotal = 0;

        Console.WriteLine("**********Welcome to K&W**********\n\n");

        Console.Write("How many are in your part?  ");
        inParty = Convert.ToInt32(Console.ReadLine());

        while(inParty > 0)
        {
            inParty--;

            Console.Write("\nEnter your entree amount:  $");
            entreeAmount = Convert.ToDouble(Console.ReadLine());
            Convert.ToDouble(orderAmount += entreeAmount);

            Console.Write("Do you want a drink, enter 1 for yes or another number for no.  ");
            drinkSelection = Convert.ToInt32(Console.ReadLine());
            if (drinkSelection == 1)
            {
                Convert.ToDouble(orderAmount += drinkPrice);
            }
            else
            {
                Console.WriteLine("\tNo drink at this time");
            }

            Console.Write("\nPlease choose a discount, enter 1 for senior, 2 for child or 3 for none:  ");
            discoutSelection = Convert.ToInt32(Console.ReadLine());
            if (discoutSelection == 1)
            {
                //Convert.ToDouble(discount = 0.10);
                orderAmount = Convert.ToDouble(orderAmount * 0.90);

            }
            if (discoutSelection == 2)
            {
                //Convert.ToDouble(discount = 0.20);
                orderAmount = Convert.ToDouble(orderAmount * 0.80);

            }

            finalTotal += Convert.ToDouble(orderAmount);
            entreeAmount = 0;
            drinkSelection = 0;
            discoutSelection = 0;
            orderAmount = 0;

        }

        taxAmount = Convert.ToDouble(orderAmount * tax);
        finalTotal = Convert.ToDouble(orderAmount + taxAmount);

        Console.WriteLine("\nYour bill is below:\n");
        Console.WriteLine("Your subtotal is\t{0:C}", orderAmount);
        Console.WriteLine("Tax amount is\t{0:C}", taxAmount);
        Console.WriteLine("Your final bill is:\t{0:C}", finalTotal);

        Console.WriteLine("\n\nThank you for your order come again soom!!");
    }
}

}

Answer 1

您在任务结束时的计算是错误的。您使用的是错误的变量

double subTotal = finalAmount;
taxAmount = Convert.ToDouble(finalTotal * tax);
finalTotal = Convert.ToDouble(finalTotal + taxAmount);

orderAmount在每个循环结束时重置为零

Console.WriteLine("\nYour bill is below:\n");
Console.WriteLine("Your subtotal is\t{0:C}", subTotal);
Console.WriteLine("Tax amount is\t{0:C}", taxAmount);
Console.WriteLine("Your final bill is:\t{0:C}", finalTotal);

最后，在进行涉及货币值的计算时，应使用decimal数据类型。

我的C＃订单程序无法正确计算

1 个答案: