向银行系统添加利率和透支费
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【中文标题】向银行系统添加利率和透支费【英文标题】：Adding Interest Rate and Overdraft Fee to banking system 【发布时间】：2021-09-23 23:42:41 【问题描述】：这就是我想要实现的目标：
如果请求提款超过允许的透支限额（100 美元），则不会提款，并且会从余额中扣除固定的固定费用（10 美元）。
在下面的代码中，我已尽力做到这一点，但它不起作用，因为当我提取超过余额的金额时，它不会给我带来失败的交易费用，而是给我一个负余额。我也不确定当用户点击他们想要查看的帐户详细信息时，我希望它显示失败的交易费用（如果有的话）如果用户透支了。
任何帮助将不胜感激。就是想不通。
class Program
class Customer
private string firstName;
private string lastName;
private int phoneNumber;
private string address;
public Customer()
firstName = "Tayla";
lastName = "Brown";
phoneNumber = 027493922;
address = "55 Grey Rd";
//client info
public string ClientInfo()
string clientinfo = ("Account Holder: " + firstName + " " + lastName + " " + "Phone Number: " + phoneNumber + " " + "Address: " + address);
return clientinfo;
class Account : Customer
// Fields
private double accountNumber;
protected string accountType;
protected double balance;
protected double deposit;
protected double withdrawal;
protected double interest;
protected double fee;
protected double overdraft;
// Properties
public string AccountType
get return this.accountType;
public double Withdrawal
get return this.withdrawal;
set this.withdrawal = value;
public double Deposit
get return this.deposit;
set this.deposit = value;
public double AcctNumber
get return this.accountNumber;
public double Bal
get return this.balance;
public double f
get return this.fee;
public double od
get return this.overdraft;
// Creating Random Account Number
public virtual double AccountNumb()
Random rand = new Random();
this.accountNumber = rand.Next(100000000, 1000000000);
return accountNumber;
public virtual double Fee() // Work out Fee
overdraft = 100;
fee = 10;
if (balance < withdrawal)
balance -= (overdraft + withdrawal);
else if (balance > withdrawal)
balance -= withdrawal;
fee -= balance;
return balance;
//Computes General Balance(resets values)
public virtual double Balance()
balance = balance + deposit - withdrawal;
deposit = 0;
withdrawal = 0;
return balance;
//Computers Balance when withdrawal equals zero
public virtual double DepositBalance(double input)
deposit = input;
withdrawal = 0;
balance = balance + deposit - withdrawal;
return balance;
//Computers balance when deposit equals zero
public virtual double WithBalance(double input)
withdrawal = input;
deposit = 0;
balance = balance + deposit - withdrawal;
return balance;
//displays online banking menu
public virtual void DisplayMenu()
Console.WriteLine("Welcome to your online bank account\nPlease choose from the options below: ");
Console.WriteLine("");
Console.WriteLine("1.View Client Info");
Console.WriteLine("");
Console.WriteLine("2. View Account Balance:");
Console.WriteLine(" 2A.Everyday\n 2B.Investment\n 2C.Omni");
Console.WriteLine("");
Console.WriteLine("3.Deposit Funds:\n 3A.Everyday\n 3B.Investment\n 3C.Omni");
Console.WriteLine("");
Console.WriteLine("4.Withdraw Funds:\n 4A.Everyday\n 4B.Investment\n 4C.Omni");
Console.WriteLine("");
Console.WriteLine("5.View Everyday Banking Details");
Console.WriteLine("6.View Investment Banking Details");
Console.WriteLine("7.View Omni Banking details");
Console.WriteLine("");
Console.WriteLine("8.Exit");
// Everyday Account
class Everyday : Account
//field
private double minBalance;
private double maxBalance;
//properties
public double MinBalance
get return this.minBalance;
public double MaxBalance
get return this.maxBalance;
//constructors
public Everyday(double balance) : base()
this.minBalance = 0;
this.maxBalance = 1000000000000;
this.balance = balance;
accountType = "Everyday Account";
//methods
// Investment Account
class Investment : Account
//fields
private int investmentInterest;
private int feeInvestment;
//properties
public int InterestInvestment
get return this.investmentInterest; // Sets Interest
set investmentInterest = 4;
public int FeeInvestment
get return this.feeInvestment; // Sets Fee
set feeInvestment = 10;
//constructors
public Investment(double balance) : base()
this.balance = balance;
accountType = "Investment Account";
//methods
// Omni Account
class Omni : Account // If a request is made to withdraw money over and above the allowed overdraft limit, then no money is withdrawn and
// a fixed flat fee is deducted from the balance
//fields
private int interestOmni;
private int overdraft;
//properties
public int InterestOmni
get return this.interestOmni; // Get interest
set interestOmni = 4;
public int OverDraftOmni
get return this.overdraft; // Get overdraft
//constructors
public Omni(double balance) : base()
interestOmni = 4;
overdraft = 1000; // Overdraft same as min balance?
this.balance = balance;
accountType = "Omni Account";
static void Main(string[] args)
// Object Insantiating
Account client = new Account(); // Our one client
Everyday everyday = new Everyday(2000);
everyday.AccountNumb();
Investment investment = new Investment(500);
investment.AccountNumb();
Omni omni = new Omni(1000);
omni.AccountNumb();
string streamEverydayAccount = ("Account Number: " + everyday.AcctNumber);
string streamInvestmentAccount = ("Account Number: " + investment.AcctNumber);
string streamOmniAccount = ("Account Number: " + omni.AcctNumber);
string streamClientInfo = (client.ClientInfo());
string everydayAccountType = (everyday.AccountType);
string investmentAccountType = (everyday.AccountType);
string omniAccountType = (everyday.AccountType);
// StreamWriter Everyday Account
using (StreamWriter everydaysummary = new StreamWriter(@"EverydaySummary.txt", true))
everydaysummary.WriteLine(everydayAccountType);
everydaysummary.WriteLine(streamClientInfo);
everydaysummary.WriteLine(streamEverydayAccount);
// StreamWriter Investment Account
using (StreamWriter investmentsummary = new StreamWriter(@"InvestmentSummary.txt", true))
investmentsummary.WriteLine(investmentAccountType);
investmentsummary.WriteLine(streamClientInfo);
investmentsummary.WriteLine(streamInvestmentAccount);
// StreamWriter Omni Account
using (StreamWriter omnisummary = new StreamWriter(@"OmniSummary.txt", true))
omnisummary.WriteLine(omniAccountType);
omnisummary.WriteLine(streamClientInfo);
omnisummary.WriteLine(streamOmniAccount);
bool test = false;
do
string everydayDepositPara = ($"Transaction: +$everyday.Deposit at DateTime.Now.ToString() Current Balance: $everyday.Bal");
string everdayWithdrawalPara = ($"Transaction: -$everyday.Withdrawal at DateTime.Now.ToString() Current Balance: $everyday.Bal");
string investmentDepositPara = ($"Transaction: +$investment.Deposit at DateTime.Now.ToString() Current Balance: $investment.Bal");
string investmentWithdrawalPara = ($"Transaction: -$investment.Withdrawal at DateTime.Now.ToString() Current Balance: $investment.Bal");
string omniDepositPara = ($"Transaction: +$omni.Deposit at DateTime.Now.ToString() Current Balance: $omni.Bal");
string omniWithdrawalPara = ($"Transaction: -$omni.Withdrawal at DateTime.Now.ToString() Current Balance: $omni.Bal");
//INSTANTIATING STREAMWRITER FILES
// Everyday
using (StreamWriter everdayAccountStreamSummary = new StreamWriter("EverdaySummary.txt", true))
if (everyday.Deposit > 0)
everdayAccountStreamSummary.WriteLine(everydayDepositPara);
everyday.Deposit = 0;
if (everyday.Withdrawal > 0)
everdayAccountStreamSummary.WriteLine(everdayWithdrawalPara);
everyday.Withdrawal = 0;
//Investment
using (StreamWriter investmentAccountStreamSummary = new StreamWriter("InvestmentSummary.txt", true))
if (investment.Deposit > 0)
investmentAccountStreamSummary.WriteLine(investmentDepositPara);
investment.Deposit = 0;
if (investment.Withdrawal > 0)
investmentAccountStreamSummary.WriteLine(investmentWithdrawalPara);
investment.Withdrawal = 0;
//Omni
using (StreamWriter omniAccountStreamSummary = new StreamWriter("OmniSummary.txt", true))
if (omni.Deposit > 0)
omniAccountStreamSummary.WriteLine(omniDepositPara);
omni.Deposit = 0;
if (omni.Withdrawal > 0)
omniAccountStreamSummary.WriteLine(omniWithdrawalPara);
omni.Withdrawal = 0;
client.DisplayMenu();//the online banking menu
string userchoice = Console.ReadLine();//user input from menu options
switch (userchoice.ToUpper())
case "1": // Display Client Info
Console.Clear();
Console.WriteLine(client.ClientInfo());
break;
case "2A": // Display Everday Account Balance
Console.Clear();
everyday.Balance();
Console.WriteLine("Everyday Account Balance: $" + everyday.Bal);
break;
case "2B": // Display Investment Account Balance
Console.Clear();
investment.Balance();
Console.WriteLine("Investment Account Balance: $" + investment.Bal);
break;
case "2C": // Display Omni Account Balance
Console.Clear();
omni.Balance();
Console.WriteLine("Omni Account Balance: $" + omni.Bal);
break;
case "3A": // Everyday Account Deposit
Console.Clear();
Console.WriteLine("How much would you like to deposit?");
everyday.Deposit = double.Parse(Console.ReadLine());
Console.WriteLine("You deposited: $" + everyday.Deposit);
everyday.DepositBalance(everyday.Deposit);
break;
case "3B":
Console.Clear(); // Investment Account Deposit
Console.WriteLine("How much would you like to deposit?");
investment.Deposit = double.Parse(Console.ReadLine());
Console.WriteLine("You deposited: $" + investment.Deposit);
investment.DepositBalance(investment.Deposit);
break;
case "3C":
Console.Clear(); // Omni Account Deposit
Console.WriteLine("How much would you like to deposit?");
omni.Deposit = double.Parse(Console.ReadLine());
Console.WriteLine("You deposited: $" + omni.Deposit);
omni.DepositBalance(omni.Deposit);
break;
case "4A": // Everyday account Withdrawal
Console.Clear();
Console.WriteLine("How much would you like to withdraw?");
everyday.Withdrawal = double.Parse(Console.ReadLine());
Console.WriteLine("You withdrew: $" + everyday.Withdrawal);
everyday.WithBalance(everyday.Withdrawal);
break;
case "4B":
Console.Clear(); // Investment Account Withdrawal
Console.WriteLine("How much would you like to withdraw?");
investment.Withdrawal = double.Parse(Console.ReadLine());
Console.WriteLine("You withdrew: $" + investment.Withdrawal);
investment.WithBalance(investment.Withdrawal);
break;
case "4C":
Console.Clear(); // Omni Account Withdrawal
Console.WriteLine("How much would you like to withdraw?");
omni.Withdrawal = double.Parse(Console.ReadLine());
Console.WriteLine("You withdrew: $" + omni.Withdrawal);
omni.WithBalance(omni.Withdrawal);
break;
case "5":
Console.Clear(); // Everyday Details
Console.WriteLine("Everyday Banking Details");
everyday.Balance();
Console.WriteLine("Everyday Account Balance: $" + everyday.Bal);
break;
case "6":
Console.Clear(); // Investment Details
Console.WriteLine("Investment Banking Details");
everyday.Balance();
Console.WriteLine("Investment Account Balance: $" + investment.Bal); // Add Interest Rate and Fee
Console.WriteLine("Interest Rate: " + investment.InterestInvestment + "%");
Console.WriteLine("Fee: "
);
break;
case "7":
Console.Clear(); // Omni Details
Console.WriteLine("Omni Banking Details");
everyday.Balance();
Console.WriteLine("Omni Account Balance: $" + omni.Bal);
Console.WriteLine("Interest Rate: " + omni.InterestOmni + "%");
Console.WriteLine("Fee: ");
break;
case "8":
Console.Clear(); // Exit Banking
Console.WriteLine("You have chosen to exit the online banking. Thanks and come again!");
Environment.Exit(0);
break;
default: // catch all, breaks the loop
Console.Clear();
test = false;
break;
while (!test);
【问题讨论】：
“在下面的代码中，我已经尽力做到了，但它不起作用” - 请提供您期望发生的情况以及实际发生的情况的详细信息.您可以编辑您的问题来执行此操作。 我已经编辑了我的描述。很抱歉，没有解释发生了什么。 @TaylaB - 你的代码真的坏了。你能发布你的实际代码吗？ @Enigmativity 我更新了我的代码并被整个项目插入Customer 的构造函数中没有默认数据。您已经引入了一个错误，并让Account 继承自Customer。您应该实例化一次Customer 并将数据传递给构造函数，然后让Account 在其构造函数中使用Customer。
【参考方案1】：
我已经对您的代码进行了重构 - 真的很难理解您想要做什么 - 所以这是一个相当大的变化。我已经删除了很多重复项，但我无法真正完成所有内容，因为您的代码中也缺少很多内容。
我无法回答如何在您的代码中修复您的一种方法，因为您在帐户类中更改状态的方式真的很难遵循。
在我的重构中，我总是像这样计算Balance：
public decimal Balance => this.Opening + this.Deposits - this.Withdrawals + this.Interest - this.Fees;
所以现在只需正确获取Balance 的各个组件即可。
Withdraw 现在是如何做到这一点的：
public (decimal Withdrawn, decimal Fee) Withdraw(decimal amount)
if (amount <= 0m)
throw new System.InvalidOperationException("Withdrawal amount must be positive");
decimal fee = 0;
if (amount > this.Overdraft)
amount = 0m;
fee = 10m;
else if (this.Balance < amount)
amount = this.Balance;
this.Withdrawals -= amount;
return (amount, fee);
如果我理解正确，当您尝试提取的金额超过Overdraft 金额时，您将获得$10 费用，并且没有任何内容被提取。我添加了一张支票，以确保您提取的金额不能超过余额。
这是我重构的其余部分。让我知道你需要讨论什么：
class Program
public class Client
private string _firstName;
private string _lastName;
private string _phoneNumber;
private string _address;
public Client(string firstName, string lastName, string phoneNumber, string address)
_firstName = firstName;
_lastName = lastName;
_phoneNumber = phoneNumber;
_address = address;
public string ClientInfo =>
$"Account Holder: _firstName _lastName Phone Number: _phoneNumber Address: _address";
public abstract class Account
private Client _client;
public Account(Client client, int accountNumber, decimal opening)
_client = client;
this.AccountNumber = accountNumber;
this.Opening = opening;
public Account(Client client, decimal opening) : this(client, Account.GenerateAccountNumber(), opening)
public int AccountNumber get; private set;
public string AccountType => $"this.GetType().Name Account";
public abstract decimal Overdraft get; protected set;
public decimal Opening get; protected set;
public decimal Deposits get; protected set;
public decimal Withdrawals get; protected set;
public decimal Interest get; protected set;
public decimal Fees get; protected set;
public decimal InterestRate get; protected set; = 4m;
public decimal Balance => this.Opening + this.Deposits - this.Withdrawals + this.Interest - this.Fees;
private static Random _random = new Random();
public static int GenerateAccountNumber() => _random.Next(100000000, 1000000000);
public (decimal Withdrawn, decimal Fee) Withdraw(decimal amount)
if (amount <= 0m)
throw new System.InvalidOperationException("Withdrawal amount must be positive");
decimal fee = 0;
if (amount > this.Overdraft)
amount = 0m;
fee = 10m;
else if (this.Balance < amount)
amount = this.Balance;
this.Withdrawals += amount;
this.Fees += fee;
return (amount, fee);
public decimal Deposit(decimal amount)
if (amount <= 0m)
throw new System.InvalidOperationException("Deposit amount must be positive");
this.Deposits += amount;
return amount;
public IEnumerable<string> GetTransactions()
var now = DateTime.Now;
if (this.Deposits > 0m)
yield return $"Deposits: +$this.Deposits at now.ToString() Current Balance: $this.Balance";
if (this.Withdrawals > 0m)
yield return $"Withdrawals: +$this.Withdrawals at now.ToString() Current Balance: $this.Balance";
public string Summary => String.Join(Environment.NewLine, this.AccountType, _client.ClientInfo, "Account Number: " + this.AccountNumber);
public class Everyday : Account
public decimal MinBalance get; private set; = 0m;
public decimal MaxBalance get; private set; = 1000000000000m;
public override decimal Overdraft get; protected set; = 100m;
public Everyday(Client client, decimal opening) : base(client, opening)
public Everyday(Client client, int accountNumber, decimal opening) : base(client, accountNumber, opening)
public class Investment : Account
public decimal InvestmentFee get; private set; = 10m;
public override decimal Overdraft get; protected set; = 100m;
public Investment(Client client, decimal opening) : base(client, opening)
public Investment(Client client, int accountNumber, decimal opening) : base(client, accountNumber, opening)
class Omni : Account
public override decimal Overdraft get; protected set; = 1000m;
public Omni(Client client, decimal opening) : base(client, opening)
public Omni(Client client, int accountNumber, decimal opening) : base(client, accountNumber, opening)
private static void DisplayBalance(Account account)
Console.WriteLine($"account.AccountType Balance: account.Balance:$#,##0.00");
private static void DepositAmount(Account account)
Console.WriteLine("How much would you like to deposit?");
decimal deposited = account.Deposit(decimal.Parse(Console.ReadLine()));
Console.WriteLine($"You deposited: deposited:$#,##0.00 into your account.AccountType");
private static void WithdrawAmount(Account account)
Console.WriteLine("How much would you like to withdraw?");
var result = account.Withdraw(decimal.Parse(Console.ReadLine()));
Console.WriteLine($"You withdrew: result.Withdrawn:$#,##0.00");
if (result.Fee != 0m)
Console.WriteLine($"With fee: result.Fee:$#,##0.00");
private static void DisplayDetails(Everyday account)
Console.WriteLine("Everyday Banking Details");
Console.WriteLine($"account.AccountType Balance: account.Balance:$#,##0.00");
private static void DisplayDetails(Investment account)
Console.WriteLine("Investment Banking Details");
Console.WriteLine($"account.AccountType Balance: account.Balance:$#,##0.00");
Console.WriteLine("Interest Rate: " + account.InterestRate + "%");
Console.WriteLine("Fee: ");
private static void DisplayDetails(Omni account)
Console.WriteLine("Omni Banking Details");
Console.WriteLine($"account.AccountType Balance: account.Balance:$#,##0.00");
Console.WriteLine("Interest Rate: " + account.InterestRate + "%");
Console.WriteLine("Fee: ");
private static void Main(string[] args)
bool test = false;
Client client = new Client("Tayla", "Brown", "027493922", "55 Grey Rd"); // Our one client
Everyday everyday = new Everyday(client, Account.GenerateAccountNumber(), 2000m);
Investment investment = new Investment(client, 500m);
Omni omni = new Omni(client, 1000m);
File.WriteAllText(@"EverydaySummary.txt", everyday.Summary);
File.WriteAllText(@"InvestmentSummary.txt", investment.Summary);
File.WriteAllText(@"OmniSummary.txt", omni.Summary);
do
File.WriteAllLines("EverdaySummary.txt", everyday.GetTransactions());
File.WriteAllLines("InvestmentSummary.txt", investment.GetTransactions());
File.WriteAllLines("OmniSummary.txt", omni.GetTransactions());
DisplayMenu();
string userchoice = Console.ReadLine();//user input from menu options
switch (userchoice.ToUpper())
case "1": // Display Client Info
//Console.Clear();
Console.WriteLine(client.ClientInfo);
break;
case "2A": // Display Everday Account Balance
//Console.Clear();
DisplayBalance(everyday);
break;
case "2B": // Display Investment Account Balance
//Console.Clear();
DisplayBalance(investment);
break;
case "2C": // Display Omni Account Balance
//Console.Clear();
DisplayBalance(omni);
break;
case "3A": // Everyday Account Deposit
//Console.Clear();
DepositAmount(everyday);
break;
case "3B":
//Console.Clear(); // Investment Account Deposit
DepositAmount(investment);
break;
case "3C":
//Console.Clear(); // Omni Account Deposit
DepositAmount(omni);
break;
case "4A": // Everyday account Withdrawal
//Console.Clear();
WithdrawAmount(everyday);
break;
case "4B":
//Console.Clear(); // Investment Account Withdrawal
WithdrawAmount(investment);
break;
case "4C":
//Console.Clear(); // Omni Account Withdrawal
WithdrawAmount(omni);
break;
case "5":
//Console.Clear(); // Everyday Details
DisplayDetails(everyday);
break;
case "6":
//Console.Clear(); // Investment Details
DisplayDetails(investment);
break;
case "7":
//Console.Clear(); // Omni Details
DisplayDetails(omni);
break;
case "8":
//Console.Clear(); // Exit Banking
Console.WriteLine("You have chosen to exit the online banking. Thanks and come again!");
test = true;
break;
default: // catch all, breaks the loop
//Console.Clear();
test = false;
break;
while (!test);
//displays online banking menu
private static void DisplayMenu()
Console.WriteLine("Welcome to your online bank account\nPlease choose from the options below: ");
Console.WriteLine("");
Console.WriteLine("1.View Client Info");
Console.WriteLine("");
Console.WriteLine("2. View Account Balance:");
Console.WriteLine(" 2A.Everyday\n 2B.Investment\n 2C.Omni");
Console.WriteLine("");
Console.WriteLine("3.Deposit Funds:\n 3A.Everyday\n 3B.Investment\n 3C.Omni");
Console.WriteLine("");
Console.WriteLine("4.Withdraw Funds:\n 4A.Everyday\n 4B.Investment\n 4C.Omni");
Console.WriteLine("");
Console.WriteLine("5.View Everyday Banking Details");
Console.WriteLine("6.View Investment Banking Details");
Console.WriteLine("7.View Omni Banking details");
Console.WriteLine("");
Console.WriteLine("8.Exit");
这里有一些测试代码表明现在应该可以工作了。
private static void Main(string[] args)
Client client = new Client("Tayla", "Brown", "027493922", "55 Grey Rd");
Everyday everyday = new Everyday(client, Account.GenerateAccountNumber(), 30m);
Console.WriteLine($"Balance: everyday.Balance");
var r1 = everyday.Withdraw(15m);
Console.WriteLine($"Withdrawn: r1.Withdrawn, Fee: r1.Fee, Balance: everyday.Balance");
var r2 = everyday.Withdraw(1000m);
Console.WriteLine($"Withdrawn: r2.Withdrawn, Fee: r2.Fee, Balance: everyday.Balance");
var r3 = everyday.Withdraw(10m);
Console.WriteLine($"Withdrawn: r3.Withdrawn, Fee: r3.Fee, Balance: everyday.Balance");
这给了：
Balance: 30
Withdrawn: 15, Fee: 0, Balance: 15
Withdrawn: 0, Fee: 10, Balance: 5
Withdrawn: 5, Fee: 0, Balance: 0
这是一个带有交易的版本。
class Program
public class Client
private string _firstName;
private string _lastName;
private string _phoneNumber;
private string _address;
public Client(string firstName, string lastName, string phoneNumber, string address)
_firstName = firstName;
_lastName = lastName;
_phoneNumber = phoneNumber;
_address = address;
public string ClientInfo =>
$"Account Holder: _firstName _lastName Phone Number: _phoneNumber Address: _address";
public abstract class Account
private Client _client;
public Account(Client client, int accountNumber, decimal opening)
_client = client;
this.AccountNumber = accountNumber;
this.Transactions.Add(Transaction.Create(DateTime.Now, opening, TransactionType.Opening));
public Account(Client client, decimal opening) : this(client, Account.GenerateAccountNumber(), opening)
public int AccountNumber get; private set;
public string AccountType => $"this.GetType().Name Account";
public abstract decimal Overdraft get; protected set;
public List<Transaction> Transactions get; private set; = new List<Transaction>();
public decimal InterestRate get; protected set; = 4m;
public decimal Balance => this.Transactions.Sum(t => t.Amount);
private static Random _random = new Random();
public static int GenerateAccountNumber() => _random.Next(100000000, 1000000000);
public (decimal Withdrawn, decimal Fee) Withdraw(decimal amount)
if (amount <= 0m)
throw new System.InvalidOperationException("Withdrawal amount must be positive");
decimal fee = 0;
if (amount > this.Overdraft)
amount = 0m;
fee = 10m;
else if (this.Balance < amount)
amount = this.Balance;
if (amount > 0m)
this.Transactions.Add(Transaction.Create(DateTime.Now, amount, TransactionType.Withdrawal));
if (fee > 0m)
this.Transactions.Add(Transaction.Create(DateTime.Now, fee, TransactionType.Fee));
return (amount, fee);
public decimal Deposit(decimal amount)
if (amount <= 0m)
throw new System.InvalidOperationException("Deposit amount must be positive");
this.Transactions.Add(Transaction.Create(DateTime.Now, amount, TransactionType.Deposit));
return amount;
public string Summary => String.Join(Environment.NewLine, this.AccountType, _client.ClientInfo, "Account Number: " + this.AccountNumber);
public class Everyday : Account
public decimal MinBalance get; private set; = 0m;
public decimal MaxBalance get; private set; = 1000000000000m;
public override decimal Overdraft get; protected set; = 100m;
public Everyday(Client client, decimal opening) : base(client, opening)
public Everyday(Client client, int accountNumber, decimal opening) : base(client, accountNumber, opening)
public class Investment : Account
public decimal InvestmentFee get; private set; = 10m;
public override decimal Overdraft get; protected set; = 100m;
public Investment(Client client, decimal opening) : base(client, opening)
public Investment(Client client, int accountNumber, decimal opening) : base(client, accountNumber, opening)
class Omni : Account
public override decimal Overdraft get; protected set; = 1000m;
public Omni(Client client, decimal opening) : base(client, opening)
public Omni(Client client, int accountNumber, decimal opening) : base(client, accountNumber, opening)
public class Transaction
public DateTime When get; private set;
public decimal Amount get; private set;
public TransactionType Type get; private set;
public static Transaction Create(DateTime when, decimal amount, TransactionType type)
if (amount <= 0m)
throw new System.InvalidOperationException("Transaction amount must be positive");
return new Transaction(when, (type == TransactionType.Withdrawal || type == TransactionType.Fee) ? -amount : amount, type);
private Transaction(DateTime when, decimal amount, TransactionType type)
this.When = when;
this.Amount = amount;
this.Type = type;
public enum TransactionType Opening, Deposit, Withdrawal, Fee, Interest
private static void DisplayBalance(Account account)
Console.WriteLine($"account.AccountType Balance: account.Balance:$#,##0.00");
private static void DepositAmount(Account account)
Console.WriteLine("How much would you like to deposit?");
decimal deposited = account.Deposit(decimal.Parse(Console.ReadLine()));
Console.WriteLine($"You deposited: deposited:$#,##0.00 into your account.AccountType");
private static void WithdrawAmount(Account account)
Console.WriteLine("How much would you like to withdraw?");
var result = account.Withdraw(decimal.Parse(Console.ReadLine()));
Console.WriteLine($"You withdrew: result.Withdrawn:$#,##0.00");
if (result.Fee != 0m)
Console.WriteLine($"With fee: result.Fee:$#,##0.00");
private static void DisplayDetails(Everyday account)
Console.WriteLine("Everyday Banking Details");
Console.WriteLine($"account.AccountType Balance: account.Balance:$#,##0.00");
private static void DisplayDetails(Investment account)
Console.WriteLine("Investment Banking Details");
Console.WriteLine($"account.AccountType Balance: account.Balance:$#,##0.00");
Console.WriteLine("Interest Rate: " + account.InterestRate + "%");
Console.WriteLine("Fee: ");
private static void DisplayDetails(Omni account)
Console.WriteLine("Omni Banking Details");
Console.WriteLine($"account.AccountType Balance: account.Balance:$#,##0.00");
Console.WriteLine("Interest Rate: " + account.InterestRate + "%");
Console.WriteLine("Fee: ");
private static void Main(string[] args)
bool test = false;
Client client = new Client("Tayla", "Brown", "027493922", "55 Grey Rd"); // Our one client
Everyday everyday = new Everyday(client, Account.GenerateAccountNumber(), 2000m);
Investment investment = new Investment(client, 500m);
Omni omni = new Omni(client, 1000m);
File.WriteAllText(@"EverydaySummary.txt", everyday.Summary);
File.WriteAllText(@"InvestmentSummary.txt", investment.Summary);
File.WriteAllText(@"OmniSummary.txt", omni.Summary);
do
File.WriteAllLines("EverdaySummary.txt", everyday.Transactions.Select(t => $"t.When t.Type t.Amount"));
File.WriteAllLines("InvestmentSummary.txt", investment.Transactions.Select(t => $"t.When t.Type t.Amount"));
File.WriteAllLines("OmniSummary.txt", omni.Transactions.Select(t => $"t.When t.Type t.Amount"));
DisplayMenu();
string userchoice = Console.ReadLine();//user input from menu options
switch (userchoice.ToUpper())
case "1": // Display Client Info
//Console.Clear();
Console.WriteLine(client.ClientInfo);
break;
case "2A": // Display Everday Account Balance
//Console.Clear();
DisplayBalance(everyday);
break;
case "2B": // Display Investment Account Balance
//Console.Clear();
DisplayBalance(investment);
break;
case "2C": // Display Omni Account Balance
//Console.Clear();
DisplayBalance(omni);
break;
case "3A": // Everyday Account Deposit
//Console.Clear();
DepositAmount(everyday);
break;
case "3B":
//Console.Clear(); // Investment Account Deposit
DepositAmount(investment);
break;
case "3C":
//Console.Clear(); // Omni Account Deposit
DepositAmount(omni);
break;
case "4A": // Everyday account Withdrawal
//Console.Clear();
WithdrawAmount(everyday);
break;
case "4B":
//Console.Clear(); // Investment Account Withdrawal
WithdrawAmount(investment);
break;
case "4C":
//Console.Clear(); // Omni Account Withdrawal
WithdrawAmount(omni);
break;
case "5":
//Console.Clear(); // Everyday Details
DisplayDetails(everyday);
break;
case "6":
//Console.Clear(); // Investment Details
DisplayDetails(investment);
break;
case "7":
//Console.Clear(); // Omni Details
DisplayDetails(omni);
break;
case "8":
//Console.Clear(); // Exit Banking
Console.WriteLine("You have chosen to exit the online banking. Thanks and come again!");
test = true;
break;
default: // catch all, breaks the loop
//Console.Clear();
test = false;
break;
while (!test);
//displays online banking menu
private static void DisplayMenu()
Console.WriteLine("Welcome to your online bank account\nPlease choose from the options below: ");
Console.WriteLine("");
Console.WriteLine("1.View Client Info");
Console.WriteLine("");
Console.WriteLine("2. View Account Balance:");
Console.WriteLine(" 2A.Everyday\n 2B.Investment\n 2C.Omni");
Console.WriteLine("");
Console.WriteLine("3.Deposit Funds:\n 3A.Everyday\n 3B.Investment\n 3C.Omni");
Console.WriteLine("");
Console.WriteLine("4.Withdraw Funds:\n 4A.Everyday\n 4B.Investment\n 4C.Omni");
Console.WriteLine("");
Console.WriteLine("5.View Everyday Banking Details");
Console.WriteLine("6.View Investment Banking Details");
Console.WriteLine("7.View Omni Banking details");
Console.WriteLine("");
Console.WriteLine("8.Exit");
【讨论】：
嘿，非常感谢。但是当我运行这段代码时，我仍然可以提取可用余额。是的，你是正确的，我希望它不让用户超过 100 次透支限制，如果他们这样做，那么给他们 20 的费用。 我在Everyday everyday = new Everyday(client, 2000, Account.GenerateAccountNumber()); 上写错了——应该是Everyday everyday = new Everyday(client, Account.GenerateAccountNumber(), 2000m);。 C# 做了一些隐式转换，允许代码编译它不应该编译。
@TaylaB - 我正在努力确保代码适用于提款。
我犯的另一个错误是在提款代码中。应该是this.Withdrawals += amount;，而不是this.Withdrawals -= amount;。
@TaylaB - 我忘记了 this.Fees += fee; 方法中的 Withdraw 行。以上是关于向银行系统添加利率和透支费的主要内容，如果未能解决你的问题，请参考以下文章