Question

我正在创建一个具有这两种方法的程序，我无法弄清楚。它们是“撤回”和“存款”，它们位于CheckingAccount类中。在这些方法中，我想最初将值设为0然后添加到它。然后我想取新数字并从中减去。我想“存款”250美元。然后我想'退出'98美元。我不确定在哪里存储这些值以及如何执行它们。我有一个显示应该如何看待这个结尾，而我将撤销和存款方法留空。

帐户类：

class Account
{
    protected string firstName;
    protected string lastName;
    protected long number;

    public string FirstName
    {
        set
        {
            firstName = value;
        }
    }
    public string LastName
    {
        set
        {
            lastName = value;
        }
    }
    public long Number
    {
        set
        {
            number = value;
        }
    }
    public override string ToString()
    {
        return firstName + " " + lastName + "\nAccount #: " + number;
    }
}
}

检查帐户类：

    class CheckingAccount : Account
{
    private decimal balance;

    public CheckingAccount(string firstName, string lastName, long number, decimal initialBalance)
    {
        FirstName = firstName;
        LastName = lastName;
        Number = number;
        Balance = initialBalance;
    }
    public decimal Balance
    {
        get
        {
            return balance;
        }
        set
        {
            balance = value;
        }
    }


    public void deposit(decimal amount)
    {
        //initial value should be 0 and should be adding 250 to it.
    }
    public void withdraw(decimal amount)
    {
        //this takes the 250 amount and subtracts 98 from it
    }


    public void display()
    {
        Console.WriteLine(ToString());
        Console.WriteLine("Balance: ${0}", Balance);
    }
}
}

展示班级：

    class Display
{
    static void Main(string[] args)
    {

        CheckingAccount check = new CheckingAccount("John", "Smith", 123456, 0M);

        Console.WriteLine("After Account Creation...");
        check.display();

        Console.WriteLine("After Depositing $250...");
        //constructor
        Console.WriteLine("After Withdrawing $98...");
        //constructor
    }
}
}

我希望我的输出看起来像这样：

创建帐户后...
约翰史密斯帐号：123456
余额：0

存款250美元后...... 约翰史密斯帐号：123456
余额：250左

扣除98美元后... 约翰史密斯帐号：123456
余额：152

Answer 1

简单的答案是

public void deposit(decimal amount)
{
    balance += amount;
}
public void withdraw(decimal amount)
{
    balance -= amount;
}

随意添加必要的验证（透支？尝试存入负数？）

Answer 2

创建帐户：

Checking Account ca = new Checking Account (John, Smith, 123456, 0);

存入250美元：

ca.deposit(250);

提取98美元：

ca.withdraw(98);

业务逻辑：

public void deposit(decimal amount)
{
    balance += amount;
}
public void withdraw(decimal amount)
{
    balance -= amount;
}

与其他answer州一样，当您的帐户中没有金钱（或更少）时，验证诸如透支或撤销等情况是明智的。

奖金：

您还可以编写GetBalance函数来验证存款/取款。

public decimal GetBalance(long accountNumber)
{
    return balance;
}

并使用以下方式调用它：

var currentBalance = ca.GetBalance(123456);

Answer 3

您可能希望为withdraw方法提供其他逻辑以防止过度删除。

public void withdraw(decimal amount)
{
    if (balance >= amount)
    {
       balance -= amount;
    }
    else
    {
       Console.WriteLine("You can't withdraw money that you don't have!");
       // or else you could charge an overdraft fee as long as you're within 
       // a certain tolerance (minimum of -1000 or something like that). 
    }
}

简单的银行业务程序有2种方法我无法解决C＃

3 个答案: