Question

您能否帮我计算一下每种付款方式的总额，如签证，万事达卡和贝宝。我创建了接口IPay并在Mastercard，Visa和PayPal类中继承了它。它显示每个客户详细信息以及订单数量和付款类型。我需要计算每种付款类型的总付款。感谢。

public class Program
{
 public static void Main()
 {
    Customer[] custArray = new Customer[3];

    // First Customer
    custArray[0] = new Customer() { FirstName = "Adam", LastName = "Miles", Orders = new Order[2] };
    custArray[0].Orders[0] = new Order() { Description = "Shoes", Price = 19.99M, Quantity = 1, Pay = new MasterCard() };
    custArray[0].Orders[1] = new Order() { Description = "Gloves", Price = 29.99M, Quantity = 2,Pay = new Visa() };

    // Second Customer
    custArray[1] = new Customer() { FirstName = "Andrew", LastName = "Hart", Orders = new Order[2] };
    custArray[1].Orders[0] = new Order() { Description = "Jacket", Price = 39.99M, Quantity = 1,Pay = new MasterCard() };
    custArray[1].Orders[1] = new Order() { Description = "Socks", Price = 49.99M, Quantity = 1,Pay = new Paypal() };


    foreach (var customer in custArray)
    {
        if (customer == null) continue;

        Console.WriteLine("Customer:\n");
        Console.WriteLine("{0, 15} {1, 17}", "First Name", "Last Name");
        Console.WriteLine("{0, 10} {1, 20}", customer.FirstName, customer.LastName);
        Console.WriteLine("Orders:\n");

        foreach (var order in customer.Orders)
        {
            if (order == null) continue;

            Console.WriteLine("{0, 10} {1, 10} {2, 10}{3, 15}", order.Description, order.Price, order.Quantity, order.Pay);
            Console.WriteLine("\n\n");
            decimal total = order.Price * order.Quantity;
            Console.WriteLine("Total :", total);

            if (order.Pay== new MasterCard())
            {
                total = total++;   
                Console.WriteLine("Visa Total", total);
            }

            else if (order.Pay == new Visa())
            {
                total = total++;
                Console.WriteLine("Visa Total", total);
            }

            else if (order.Pay == new MasterCard())
            {
                total = total++;
                Console.WriteLine("Visa Total", total);
            }

        }
        Console.WriteLine("\n\n");


    }



        Console.ReadLine();
    }
}

class Customer
{
    public string FirstName;
    public string LastName;
    public Order[] Orders;


}
class Order
{
    public string Description;
    public decimal Price;
    public int Quantity;
    public IPay Pay; 
    // Payment type p=new pay

}
interface IPay
{
    void PayType();
}

class MasterCard : IPay
{
    public void PayType { get; set; }
}

    class Paypal : IPay
    {
        public void PayType { get; set; }
    }
    public class Visa : IPay
    {
        public void PayType {get;set;}

    }

Answer 1

正如 Yorye 在评论中所述，您可能会重新考虑您的设计。

按照linq查询提供您需要的内容。

    var res = custArray.Where(c => c != null).SelectMany(c => c.Orders)
        .GroupBy(c => c.Pay.GetType().ToString())
        .Select(c => new { PayType = c.Key, Sum = c.Sum(a => a.Price * a.Quantity) });

    foreach (var re in res)
    {
        Console.WriteLine("CardType {0}, Total : {1}", re.PayType.ToString(), re.Sum);
    }

由于您是一名bignner，因此可能需要一段时间才能了解其中的一些高级概念。

作为替代方案，您可以参考以下代码。

var results = new Dictionary<string, decimal>();

foreach (var order in customer.Orders)
{
    string key = order.Pay.GetType().ToString();
    if (!results.ContainsKey(key))
    {
        results.Add(key,(decimal) 0.0);
    }

    results[key] += results[key] + order.Quantity*order.Price;
}

Answer 2

你真的需要学习很多，从你的代码判断，了解范围，语法，Console.Writeline（）方法的重载方法，这应该让你在这个任务的路上，我修复了你的代码很少。使用枚举（谷歌）来区分付款类型...... 在你的主要方法内：

        static void Main(string[] args)
    {
        Customer[] custArray = new Customer[3];

        // First Customer
        custArray[0] = new Customer() { FirstName = "Adam", LastName = "Miles", Orders = new Order[2] };
        custArray[0].Orders[0] = new Order() { Description = "Shoes", Price = 19.99M, Quantity = 1, PayType = PayType.MasterCard };
        custArray[0].Orders[1] = new Order() { Description = "Gloves", Price = 29.99M, Quantity = 2, PayType = PayType.Visa };

        // Second Customer
        custArray[1] = new Customer() { FirstName = "Andrew", LastName = "Hart", Orders = new Order[2] };
        custArray[1].Orders[0] = new Order() { Description = "Jacket", Price = 39.99M, Quantity = 1, PayType = PayType.MasterCard };
        custArray[1].Orders[1] = new Order() { Description = "Socks", Price = 49.99M, Quantity = 1, PayType = PayType.Visa };

        decimal total = 0;
        decimal totalMaster = 0;
        decimal totalVisa = 0;
        decimal totalPaypal = 0;

        foreach (var customer in custArray)
        {
            if (customer == null) continue;

            Console.WriteLine("Customer:\n");
            Console.WriteLine("{0, 15} {1, 17}", "First Name", "Last Name");
            Console.WriteLine("{0, 11} {1, 16}", customer.FirstName, customer.LastName);
            Console.WriteLine("Orders:\n");

            decimal cust_total = 0;
            decimal cust_totalMaster = 0;
            decimal cust_totalVisa = 0;
            decimal cust_totalPaypal = 0;

            foreach (var order in customer.Orders)
            {
                if (order == null) continue;

                Console.WriteLine("{0, 10} {1, 10} {2, 10}{3, 15}", order.Description, order.Price, order.Quantity, order.PayType);
                Console.WriteLine("\n\n");

                total += order.Price * order.Quantity;
                cust_total += order.Price * order.Quantity;

                if (order.PayType == PayType.MasterCard)
                {
                    totalMaster += order.Price * order.Quantity;
                    cust_totalMaster += order.Price * order.Quantity;
                }

                else if (order.PayType == PayType.Visa)
                {
                    totalVisa += order.Price * order.Quantity;
                    cust_totalVisa += order.Price * order.Quantity;
                }

                else if (order.PayType == PayType.Paypal)
                {
                    totalPaypal += order.Price * order.Quantity;
                    cust_totalPaypal += order.Price * order.Quantity;
                }
            }
            Console.WriteLine("MasterCard Total: {0, 8}", cust_totalMaster);
            Console.WriteLine("Visa Total: {0, 13}", cust_totalVisa);
            Console.WriteLine("Paypal Total: {0, 8}", cust_totalPaypal);
            Console.WriteLine("Total: {0, 18}", cust_total);
        }
        Console.WriteLine("\n\n");
        Console.WriteLine("MasterCard GrandTotal: {0, 10}", totalMaster);
        Console.WriteLine("Visa GrandTotal: {0, 13}", totalVisa);
        Console.WriteLine("Paypal GrandTotal: {0, 10}", totalPaypal);
        Console.WriteLine("GrandTotal: {0, 18}", total);

        Console.ReadLine();
    }

类：

class Customer
{
    public string FirstName;
    public string LastName;
    public Order[] Orders;

}
class Order
{
    public string Description;
    public decimal Price;
    public int Quantity;
    public PayType PayType { get; set; }
    //public IPay Pay;
    // Payment type p=new pay

}

enum PayType{

    MasterCard,
    Visa,
    Paypal
}

我强烈推荐宝贝步骤，这就是为什么我改变你的结构，以便你可以更好地理解某些概念，稍微改变代码以学习语言的基础知识和编程，然后再深入潜水 - 它会压倒性的。

您只需要修复标签格式...

C＃如何计算每种付款方式的总计

2 个答案: