简单的银行业务程序有2种方法我无法解决C#

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.我有一个显示器应该看到的结果,而我离开撤销和存款方法是空的.

账户类别:

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;
    }
}
}

检查帐户类别:

    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);
    }
}
}

显示类:

    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...
John Smith
帐户#:123456
余额:0

存款250美元后......
约翰史密斯
账号#:123456
余额:250

撤回98美元后......
约翰史密斯
账号#: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？试图存入负数？)