Question

我无法获得下面的代码来执行异常！

首先，银行帐户为空。
进行1500笔存款
尝试提取1050，但透支额度为1000
由于提款金额大于透支额度， OverdraftEx异常应该显示我的消息（但不是）。
然后尝试提取1000英镑，这应该成功，并且余额应变为500
现在，尝试提取50条但第二条异常消息DailyLimitEx将会显示，该消息超出了每日限制，因为每日撤出限制为1000，并且已经在当天撤出，因此不会再次显示此异常。 / li>
然后，将显示一天结束，这会将DailyLimit重置为0。
然后允许撤回50，因为这是新的一天。

我无法显示例外消息。你能帮忙吗？最后有一个示例输出。

谢谢

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp2
{
    class Program
    {
        static void Main(string[] args)
        {
            Account account = new Account();
            try
            {
                double overdraftLimit = 1000;
                double dailyWithdrawlLimit = 1000;
            }
            catch (OverdraftEx e1)
            {
                Console.WriteLine(e1.Message);
            }
            catch (DailyLimitEx e2)
            {
                Console.WriteLine(e2.Message);
            }

            account.display();
            account.deposit(1500);
            account.withdraw(1050);
            account.withdraw(1000);
            Console.WriteLine("-------------------");
            account.withdraw(50);
            account.endDay();
            account.withdraw(50);

            Console.ReadLine();
            return;
        }
    }

    class OverdraftEx : Exception
    {
        private static string msg = " Sorry, the amount you are trying to withdraw exceeds your allowed overdraft limit.";
        public OverdraftEx() : base(msg)
        {
        }
    }

    class DailyLimitEx : Exception
    {
        private static string msg1 = " Sorry, you have exceeded your allowed daily withdrawal limit.";
        public DailyLimitEx() : base(msg1)
        {
        }
    }

    class Account
    {
        public int accountID { get; set; }
        public double amount;
        public double balance;
        public double Balance
        {
            get
            {
                return balance;
            }
            set
            {
                if (amount > overdraftLimit)
                {
                    OverdraftEx ex1 = new OverdraftEx();
                    throw ex1;
                }
            }
        }

        public double overdraftLimit { get; set; }

        public double dailyWithdrawlLimit
        {
            get
            {
                return dailyWithdrawlLimit;
            }
            set
            {
                if (amount > dailyWithdrawlLimit - 1000)
                {
                    DailyLimitEx ex2 = new DailyLimitEx();
                    throw ex2;
                }
            }
        }

        public Account()
        {
            accountID = 10;
            balance = 0;
            return;
        }

        public Account(int accID, double accBalance)
        {
            accountID = accID;
            balance = accBalance;
            return;
        }

        public void withdraw(double amount)
        {
            Console.WriteLine("");
            Console.WriteLine(" Attempting to withdraw $" + Math.Round(amount, 2));
            balance = balance - amount;

            Console.WriteLine(" Account #: " + accountID);
            Console.WriteLine(" Your new balance is $" + Math.Round(balance, 2));
        }

        public void deposit(double amount)
        {
            // calculating the balance after depositing money

            if (amount > 0)
            {
                Console.WriteLine(" Depositing $" + Math.Round(amount, 2));
                balance = balance + amount;
                Console.WriteLine(" Account #: " + accountID);
                Console.WriteLine(" Balance: $" + Math.Round(balance, 2));
            }
            else
                Console.WriteLine(" Sorry, amount is invalid");

            Console.WriteLine("");
            return;
        }

        public void display()
        {
            Console.WriteLine("");
            Console.WriteLine(" Account ID: " + accountID);
            Console.WriteLine(" Balance: $" + Math.Round(balance, 2));
            Console.WriteLine("");

            return;
        }
        public void endDay()
        {
            Console.WriteLine("");
            Console.WriteLine(" End Day");
            Console.WriteLine(" Account ID: " + accountID);
            Console.WriteLine(" Balance: $" + Math.Round(balance, 2));
            return;
        }
    }
}

样本输出：注意：示例输出中的第一条错误消息应显示：“抱歉，您要提取的金额超过了您允许的透支额度”，而不是下面显示的内容。 Sample Output

Answer 1

首先：您没有在方法withdraw()和deposit()中使用正确的名称。它应该是Balance = Balance - amount，而不是balance = balance - amount。第二：在Balance的setter中，您不能使用给定值的新值。您可以通过关键字value来引用新值，也不必更新属性的背景字段。

c＃自定义异常

1 个答案: