该名称在当前上下文中不存在

问题描述

using System;
using System.Collections.Generic;
using System.Text;


class Bank
{
   static List <account> accounts = new List <account> ();
   static Account active_account; // this will be an active account (reference) retrived from 
				// the bank. This will need to initialised either by 
				// CreateAccount or by RetrieveAccount.
   static void Main()
   {
       bool running = true;
       bool valid_account = false;
       bool valid_PIN = false;
       int user_option = 0;
       string account_name;
       int account_number;
       int account_pin; 
       
            while (running)
	{
			Console.WriteLine("Main Menu: Choose one of the 6 options:\n");
			Console.WriteLine("1. Create Account\n");
			Console.WriteLine("2. View account details\n"); 
			Console.WriteLine("3. Deposit\n");
			Console.WriteLine("4. Withdraw\n");
			Console.WriteLine("5. Remove Account\n");
			Console.WriteLine("6. Display all accounts\n");
			Console.WriteLine("7. Exit\n");
			Console.WriteLine("Enter a choice:");
            user_option = SafeReadInteger(0);

            if (user_option == 1)
            {
                Console.WriteLine("You wish to create a new account");
                Console.WriteLine("Please enter the name of the new account:");
                account_name = Console.ReadLine();
                Console.WriteLine("Please enter an account number:");
                account_number = SafeReadInteger(0);
                Console.WriteLine("Please enter a pin for your account:");
                account_pin = SafeReadInteger(0);
            }
            else if (user_option == 2)
            {
              
                Console.WriteLine("Please enter account number:");
                account_number = SafeReadInteger(0);
                active_account = RetrieveAccount(account_number);
                if (valid_account == null)
                {
                    Console.WriteLine("Invalid");
                }
                else
                {
                    Console.WriteLine("Please enter your pin:");
                    account_pin = SafeReadShort(0);
                    valid_PIN = active_account.Check_PIN(account_pin);
                    while (valid_PIN == false)
                    {
                        Console.WriteLine("Please enter your pin:");
                        account_pin = SafeReadShort(0);
                        valid_PIN = active_account.Check_PIN(account_pin);
                    }
                }
            }
            else if (user_option == 3)
            {
                Console.WriteLine("Please enter your account number:");
                account_number = SafeReadInteger(0);
                Console.WriteLine("Please enter the amount you wish to deposit:");
            }
       }
    }
   static Account CreateAccount(int acc_num, short pin, string owner, decimal balance)
   {
       active_account = new Account(acc_num, pin, owner, balance);
       accounts.Add(active_account);
       return active_account;
   }
    private static Account RetrieveAccount(int acc_num)
    {
        foreach (Account acc in accounts)
        {
            if (acc.Check_Account(acc_num))
            {
                return acc;
            }
        }
        return null;
 
    }
    static void DisplayAccount(int acc_num)
    {
        {
            foreach (Account acc in accounts)
                Console.WriteLine("Account Number: {0} Account Balance: {1} Account Owner:  {2}",acc.Get_AccNum(), acc.Get_Balance(), acc.Get_Owner());
        }
    }
    static void BankDeposit(int acc_num, decimal amount)
    {
        active_account = RetrieveAccount(acc_num);
        active_account.Deposit(amount);
    }
    //static bool BankWithdraw(int acc_num, decimal amount)
    //{
    //    active_account = RetrieveAccount(acc_num);
    //    active_account.Withdraw(amount);
    //}
    
    //static void DeleteAccount(int acc_num)
    //{
    //    active_account = RetrieveAccount(acc_num);
           
    //            accounts.Remove(accounts);

    //            return;
    //}
}
    //static void DisplayAccounts(int acc_num)
    //{
    //      foreach (int acc_num in accounts)
    //        {
    //            Console.Writeline(acc_nums);
    //        }
    //}
    
 

class Account
{
    private int acc_num;
    private short acc_pin;
    private string acc_owner;
    private decimal acc_balance;
    // The following Constructors are used to initialise the attributes above
    public Account(int acc_num_value, short acc_pin_value, string acc_owner_value, decimal acc_balance_value)
    {
        acc_num = acc_num_value;
        acc_pin = acc_pin_value;
        acc_owner = acc_owner_value;
        acc_balance = acc_balance_value;
    }


    public Account(int acc_num_value, short acc_pin_value, string acc_owner_value)
    {
        acc_num = acc_num_value;
        acc_pin = acc_pin_value;
        acc_owner = acc_owner_value;
    }
    public bool Check_Account(int acc_num_value)
    {
        if (acc_num_value == acc_num)
        {
            return true;
        }
        else return false;
    }
    public bool Check_PIN(short acc_pin_value)
    {
        if (acc_pin_value == acc_pin)
        {
            return true;
        }
        else
        {
            return false;
        }
    }
    public void Deposit(decimal amount_value)
    {
        if (amount_value >= 0)
        {
            acc_balance += amount_value;
        }
        else if (amount_value < 0)
        {
            Console.WriteLine("Wrong Input");
        }
    }
    public bool Withdraw(decimal amount_value)
    {
        if (amount_value > acc_balance)
        {
            return false;
        }
        else
        {
            acc_balance -= amount_value;
            return true;
        }
    }
    public string Get_Owner()
    {
        return this.acc_owner;
    }
    public decimal Get_Balance()
    {
        return this.acc_balance;
    }
    public int Get_AccNum()
    {
        return this.acc_num;
    }
    public static int SafeReadInteger1 (int defaultVal)
    {
        try
        {
            return int.Parse(System.Console.ReadLine());
        }
        catch
        {
            return defaultVal;
        }
    }
    static short SafeReadShort(short default_value)
    {
        try
        {
            return short.Parse(Console.ReadLine());
        }
        catch
        {
            return default_value;
        }
    }
}</account></account>

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