更新atm余额

Question

我试图让make current balance方法在调用提款方法后更新其余额，以便它成为任何后续提款的起始余额。我不知道我在做什么wrong.Thanks。

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


public class Customer
{
    private double deposit;
    private double balance;
    static double bankCharge = 0.50;



    public Customer(double depo)
    {
        if (depo > 2000)
        {
            Console.WriteLine("deposit cannot be morethan 2000");
        }
        else
        {

            this.deposit += depo;
        }

    }

    public void setDeposit(double depo)
    {
        if (depo > 2000)
        {
            Console.WriteLine(" Sorry, you cannot deposit morethan 2000");
        }
        else
        {
            this.deposit+= depo;
        }
    }

    public double currentBalance()
    {
        this.balance= this.deposit;
        //this.balance+=this.balance;

        return this.balance;
    }

    public double Withdrawal()
    {
        int amount;
        bool passed;
        do
        {
            Console.WriteLine("How much do you want to withdraw?");

            passed = int.TryParse(Console.ReadLine(), out amount);
            if ((!passed) || (amount % 5 != 0))

            {
                Console.WriteLine("Wrong input,No decimals please,Enter in multiples of 5, Try again");

            }
        } while (!passed || amount % 5 != 0);

        double charges = amount + bankCharge; // amount to be withdrawn + the bank charge
        Console.WriteLine("charges are {0}", charges);
       // Console.WriteLine("Your current balance is {0}", this.currentBalance());
        if (charges > this.currentBalance())
        {
            Console.WriteLine("Sorry, you do not have enough money to perform this transaction");
        }
        else
        {
         Console.WriteLine("Your current balance is {0}", this.balance);
        this.balance-= charges; // withdrawal done
         Console.WriteLine(" balance after transaction/charges is={0} ",this.balance);
        }

        return this.balance;

    }




}





class Program
{

    static void Main()
    {
        Customer lee = new Customer(500);
        lee.setDeposit(2000);
        lee.setDeposit(400);

        //Console.WriteLine("the withdraw function returns this amount {0}", lee.Withdrawal());
        Console.WriteLine(lee.Withdrawal());
        Console.WriteLine(lee.currentBalance());
    }
}

Answer 1

代码现在按照我想要的方式工作。我摆脱了currentBalance方法中的实现。我将this.balance设置为存放在构造函数和setDeposit方法中，每次存入时都会更新余额。平衡同样更新每个调用取款方法并取款的时间。这是我最初的挑战;取款后余额没有更新。现在已经确定。您可以关闭。

using System;
using System.Collections.Generic;
using System.Text;
using System.Threading.Tasks;
public class Customer
{
    private double deposit;
    private double balance;
    static double bankCharge = 0.50;
    public Customer(double depo)
    {
        if (depo > 2000)
        {
            Console.WriteLine("deposit cannot be morethan 2000");
        }
        else
        {

            this.deposit += depo;
            this.balance = this.deposit;
        }

    }
    public void setDeposit(double depo)
    {
        if (depo > 2000)
        {
            Console.WriteLine(" Sorry, you cannot deposit morethan 2000");
        }
        else
        {
            this.deposit += depo;
            this.balance = this.deposit;
        }
    }

    public double currentBalance()
    {          
     return this.balance;
    }

    public double Withdrawal()
    {

        int amount;
        bool passed;
        do
        {
            Console.WriteLine("How much do you want to withdraw?");

            passed = int.TryParse(Console.ReadLine(), out amount);
            if ((!passed) || (amount % 5 != 0))

            {
                Console.WriteLine("Wrong input,No decimals please,Enter in multiples of 5, Try again");

            }
        } while (!passed || amount % 5 != 0);

        double charges = amount + bankCharge;
        Console.WriteLine("charges are {0}", charges);
        Console.WriteLine("Your current balance is {0}", this.balance);
        if (charges > this.balance)
        {
            Console.WriteLine("Sorry, you do not have enough money to perform this transaction");
        }
        else
        {

            this.balance = this.balance - charges;

        }

        return this.balance;
    }

}
class Program
{

    static void Main()
    {
        Customer lee = new Customer(500);
        lee.setDeposit(2000);
        lee.setDeposit(400);
        lee.setDeposit(250);
        lee.setDeposit(1850);
        // Console.WriteLine( lee.Withdrawal());
        //Console.WriteLine(lee.Withdrawal());
        Console.WriteLine("Balance before withdawal is {0}", lee.currentBalance());
        Console.WriteLine( " Your balance after withdawal is {0}",lee.Withdrawal());
        Console.WriteLine("Starting balance for next transaction is {0}",lee.currentBalance());
        Console.WriteLine("*******************************************************");
        Console.WriteLine("Balance before withdawal is {0}", lee.currentBalance());
        Console.WriteLine(" Your balance after withdawal is {0}", lee.Withdrawal());
        Console.WriteLine("Starting balance for next transaction is {0}", lee.currentBalance());

    }
}