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absentmindedjwc · Feb 15th, 2006, 4:31 PM

V studio is saying "Unhandled exception: System.NullReferenceException: Object reference not set to an instance of an object.
at ATM.Main<> in c:\.........\ATM_mod.cs:line 11"

(Toggle Plain Text)

using System;

public class ATM
{

		
	public static void Main()
	{
		int x = 0;
		AccountData[] TransArray = new AccountData[2];
		TransArray[0].SetAcctNum(123);
		TransArray[0].SetPinsNum(90);
		TransArray[0].SetAvailableBalance(1000);
		TransArray[1].SetAcctNum(234);
		TransArray[1].SetPinsNum(23);
		TransArray[1].SetAvailableBalance(900);
		
		string pinString,
			accountString; 
		double pin,
			account;	
		Console.Write("Please enter your account number: ");
		accountString = Console.ReadLine();
		account = Convert.ToDouble(accountString);
		Console.Write("Please enter your pin number: ");
		pinString = Console.ReadLine();
		pin = Convert.ToDouble(pinString);
		Console.WriteLine("----------------------------------------------------------");
<continues>

Arevos · Feb 15th, 2006, 4:56 PM

Whilst I'm not that familiar with C#, I suspect your mistake is thinking that this line:

(Toggle Plain Text)

AccountData[] TransArray = new AccountData[2];

Will make an array of two AccountData objects. I'm fairly sure it won't. It'll make an array capable of holding two AccountData objects, but you'll have to create them yourself:

(Toggle Plain Text)

TransArray[0] = new AccountData();
TransArray[1] = new AccountData();

absentmindedjwc · Feb 15th, 2006, 6:22 PM

ok, that worked.... but now I found another problem when I went to run it... a wonderful infinite loop, I will mark what the console is saying with a '*' before and after

NOTE: it is located near the bottom at the Console.WriteLine

(Toggle Plain Text)

using System;

public class ATM
{

		
	public static void Main()
	{
		int x = 0;
		AccountData[] TransArray = new AccountData[2];
		TransArray[0] = new AccountData();
		TransArray[1] = new AccountData();
		TransArray[0].SetAcctNum(123);
		TransArray[0].SetPinsNum(90);
		TransArray[0].SetAvailableBalance(1000);
		TransArray[1].SetAcctNum(234);
		TransArray[1].SetPinsNum(23);
		TransArray[1].SetAvailableBalance(900);
		
		string pinString,
			accountString; 
		double pin,
			account;	
		Console.Write("Please enter your account number: ");
		accountString = Console.ReadLine();
		account = Convert.ToDouble(accountString);
		Console.Write("Please enter your pin number: ");
		pinString = Console.ReadLine();
		pin = Convert.ToDouble(pinString);
		Console.WriteLine("----------------------------------------------------------");
		Console.WriteLine();

		for(x = 0; x < TransArray.Length; ++x)
		{
			if (TransArray[x].GetAcctNum() == account && TransArray[x].GetPinsNum() == pin)
			{
				Console.Write("Do you want to make a transaction? Y or N...");
			}
			else 
				Console.WriteLine("Invalid account and pin please try again or cancel");
				
		}
		char response;	
		response = GetChar();
		while( response == 'Y' || response == 'y')
		{
			Console.WriteLine(***"Please select a transaction. Balance, Withdrawal, or Deposit");***
			switch (response)
			{
				case 'A':
				case 'a':
					BalanceMethod(TransArray[x].GetAvailableBalance());
					break;
				case 'B': 
				case 'b':		
					WithdrawalMethod(TransArray[x].GetAvailableBalance());
					break;
				case 'C': 
				case 'c':		
					DepositMethod(TransArray[x].GetAvailableBalance());
					break;
				case 'D':
				case 'd':		
					CancelMethod();
					break;
				default:
					Console.WriteLine("Invaild Selection");
					break;
			}
		}
	}

Dameon · Feb 15th, 2006, 6:41 PM

You get a single character before the beginning of the loop. If it is capital or lowercase y, it loops forever, printing "Please select a transaction" and skipping past a switch. Last I checked, capital or lowercase y does not match capital/lowercase A, B, C, or D. Perhaps you should repeat the prompt about making a transaction as well as fetch a new character each iteration. The order in which to do those two tasks and where is an excercise left to the OP.

absentmindedjwc · Feb 17th, 2006, 12:50 PM

ok, I fixed the inf loop, but now I have come across a logic error..... somewhere in here, lol

I think I said I am trying to make a ATM program, where a user punches in his number and pin (works), and then makes a decision wheather to Withdraw from his account, deposit, or get a balance.... there is the problem... it is saying that the balance is zero, but in the array at the top, it is stated that it is 900 (or 1000, i forgot, lol)

if you have any ideas, please let me know, here is the code:

(Toggle Plain Text)

using System;

public class ATM
{
	public static void Main()
	{
		int x = 0;
		AccountData[] TransArray = new AccountData[2];
		TransArray[0] = new AccountData();
		TransArray[1] = new AccountData();
		TransArray[0].SetAcctNum(123);
		TransArray[0].SetPinsNum(90);
		TransArray[0].SetAvailableBalance(1000);
		TransArray[1].SetAcctNum(234);
		TransArray[1].SetPinsNum(23);
		TransArray[1].SetAvailableBalance(900);

		string pinString,
			accountString; 
		double pin,
			account;
		Console.Write("Please enter your account number: ");
		accountString = Console.ReadLine();
		account = Convert.ToDouble(accountString);
		Console.Write("Please enter your pin number: ");
		pinString = Console.ReadLine();
		pin = Convert.ToDouble(pinString);
		Console.WriteLine("----------------------------------------------------------");
		Console.WriteLine();

		for(x = 0; x < TransArray.Length - 1; ++x)
		{
			if (TransArray[x].GetAcctNum() == account && TransArray[x].GetPinsNum() == pin)
			{
				Console.Write("Do you want to make a transaction? Y or N...");
			}
			else 
				Console.WriteLine("Invalid account and pin please try again or cancel");

		}
		char response;
		response = GetChar();
		while( response == 'Y' || response == 'y')
		{
			Console.WriteLine("Please select a transaction. Balance (a) or Withdrawal (b) or Deposit (c)");
			response = GetChar();
			switch (response)
			{
				case 'A':
				case 'a':
					BalanceMethod(TransArray[x].GetAvailableBalance());
					break;
				case 'B': 
				case 'b':
					WithdrawalMethod(TransArray[x].GetAvailableBalance());
					break;
				case 'C': 
				case 'c':
					DepositMethod(TransArray[x].GetAvailableBalance());
					break;
				case 'D':
				case 'd':
					CancelMethod();
					break;
				default:
					Console.WriteLine("Invaild Selection");
					break;
			}
		}
	}
	public static char GetChar()
	{
		char answer;
		answer = Convert.ToChar(Console.ReadLine());
		return answer;
	}
	public static void BalanceMethod(double bal)
	{
		Console.WriteLine("Your balance is {0}", bal);
		//return BalanceMethod(double);

	}
	public static void WithdrawalMethod(double bal1)
	{

		double withdrawalAmount;
		double amountWithDrawal;
		Console.WriteLine("Please enter the amount you would like to withdraw?");
		withdrawalAmount = Convert.ToDouble(Console.ReadLine());
		amountWithDrawal = bal1 - withdrawalAmount;
		Console.WriteLine("Your balance after your withdrawal is {0}", amountWithDrawal);
		//return WithdrawalMethod(double);
	}
	public static void DepositMethod(double bal2)
	{
		double depositAmount,
			depositTotal;
		Console.WriteLine("Please enter the amount you would like to deposit.");
		depositAmount = Convert.ToDouble(Console.ReadLine());
		depositTotal = depositAmount + bal2;
		Console.WriteLine("Your balance after the deposit is {0}", depositAmount);
		//return DepositMethod(double);
	}
	public static double CancelMethod()
	{
		Console.WriteLine("Thank you and come again");
		return CancelMethod();
	}

}

class AccountData
{
	private double pinNum,
		acctNum,
		AvailableBalance = 0;

	public double GetPinsNum()
	{
		return pinNum;
	}
	public void SetPinsNum(double pin)
	{
		pinNum = pin;
	}
	public double GetAcctNum()
	{
		return acctNum;
	}
	public void SetAcctNum(double account)
	{
		acctNum = account;
	}
	public double GetAvailableBalance()
	{
		return AvailableBalance;
	}
	public void SetAvailableBalance(double AvailableBalance)
	{
		AvailableBalance = AvailableBalance;
	}
}

using System;

public class ATM
{
	public static void Main()
	{
		int x = 0;
		AccountData[] TransArray = new AccountData[2];
		TransArray[0] = new AccountData();
		TransArray[1] = new AccountData();
		TransArray[0].SetAcctNum(123);
		TransArray[0].SetPinsNum(90);
		TransArray[0].SetAvailableBalance(1000);
		TransArray[1].SetAcctNum(234);
		TransArray[1].SetPinsNum(23);
		TransArray[1].SetAvailableBalance(900);

		string pinString,
			accountString; 
		double pin,
			account;
		Console.Write("Please enter your account number: ");
		accountString = Console.ReadLine();
		account = Convert.ToDouble(accountString);
		Console.Write("Please enter your pin number: ");
		pinString = Console.ReadLine();
		pin = Convert.ToDouble(pinString);
		Console.WriteLine("----------------------------------------------------------");
		Console.WriteLine();

		for(x = 0; x < TransArray.Length - 1; ++x)
		{
			if (TransArray[x].GetAcctNum() == account && TransArray[x].GetPinsNum() == pin)
			{
				Console.Write("Do you want to make a transaction? Y or N...");
			}
			else 
				Console.WriteLine("Invalid account and pin please try again or cancel");

		}
		char response;
		response = GetChar();
		while( response == 'Y' || response == 'y')
		{
			Console.WriteLine("Please select a transaction. Balance (a) or Withdrawal (b) or Deposit (c)");
			response = GetChar();
			switch (response)
			{
				case 'A':
				case 'a':
					BalanceMethod(TransArray[x].GetAvailableBalance());
					break;
				case 'B': 
				case 'b':
					WithdrawalMethod(TransArray[x].GetAvailableBalance());
					break;
				case 'C': 
				case 'c':
					DepositMethod(TransArray[x].GetAvailableBalance());
					break;
				case 'D':
				case 'd':
					CancelMethod();
					break;
				default:
					Console.WriteLine("Invaild Selection");
					break;
			}
		}
	}
	public static char GetChar()
	{
		char answer;
		answer = Convert.ToChar(Console.ReadLine());
		return answer;
	}
	public static void BalanceMethod(double bal)
	{
		Console.WriteLine("Your balance is {0}", bal);
		//return BalanceMethod(double);

	}
	public static void WithdrawalMethod(double bal1)
	{

		double withdrawalAmount;
		double amountWithDrawal;
		Console.WriteLine("Please enter the amount you would like to withdraw?");
		withdrawalAmount = Convert.ToDouble(Console.ReadLine());
		amountWithDrawal = bal1 - withdrawalAmount;
		Console.WriteLine("Your balance after your withdrawal is {0}", amountWithDrawal);
		//return WithdrawalMethod(double);
	}
	public static void DepositMethod(double bal2)
	{
		double depositAmount,
			depositTotal;
		Console.WriteLine("Please enter the amount you would like to deposit.");
		depositAmount = Convert.ToDouble(Console.ReadLine());
		depositTotal = depositAmount + bal2;
		Console.WriteLine("Your balance after the deposit is {0}", depositAmount);
		//return DepositMethod(double);
	}
	public static double CancelMethod()
	{
		Console.WriteLine("Thank you and come again");
		return CancelMethod();
	}

}

class AccountData
{
	private double pinNum,
		acctNum,
		AvailableBalance = 0;

	public double GetPinsNum()
	{
		return pinNum;
	}
	public void SetPinsNum(double pin)
	{
		pinNum = pin;
	}
	public double GetAcctNum()
	{
		return acctNum;
	}
	public void SetAcctNum(double account)
	{
		acctNum = account;
	}
	public double GetAvailableBalance()
	{
		return AvailableBalance;
	}
	public void SetAvailableBalance(double AvailableBalance)
	{
		AvailableBalance = AvailableBalance;
	}
}

Feb 15th, 2006, 4:31 PM	#1
absentmindedjwc Newbie Join Date: Feb 2006 Location: Near Chicago Posts: 5 Rep Power: 0	Problem with code - system null ref error V studio is saying "Unhandled exception: System.NullReferenceException: Object reference not set to an instance of an object. at ATM.Main<> in c:\.........\ATM_mod.cs:line 11" (Toggle Plain Text) using System; public class ATM { public static void Main() { int x = 0; AccountData[] TransArray = new AccountData[2]; TransArray[0].SetAcctNum(123); TransArray[0].SetPinsNum(90); TransArray[0].SetAvailableBalance(1000); TransArray[1].SetAcctNum(234); TransArray[1].SetPinsNum(23); TransArray[1].SetAvailableBalance(900); string pinString, accountString; double pin, account; Console.Write("Please enter your account number: "); accountString = Console.ReadLine(); account = Convert.ToDouble(accountString); Console.Write("Please enter your pin number: "); pinString = Console.ReadLine(); pin = Convert.ToDouble(pinString); Console.WriteLine("----------------------------------------------------------"); <continues> using System; public class ATM { public static void Main() { int x = 0; AccountData[] TransArray = new AccountData[2]; TransArray[0].SetAcctNum(123); TransArray[0].SetPinsNum(90); TransArray[0].SetAvailableBalance(1000); TransArray[1].SetAcctNum(234); TransArray[1].SetPinsNum(23); TransArray[1].SetAvailableBalance(900); string pinString, accountString; double pin, account; Console.Write("Please enter your account number: "); accountString = Console.ReadLine(); account = Convert.ToDouble(accountString); Console.Write("Please enter your pin number: "); pinString = Console.ReadLine(); pin = Convert.ToDouble(pinString); Console.WriteLine("----------------------------------------------------------"); <continues>

Feb 15th, 2006, 4:56 PM	#2
Arevos Programming Guru Join Date: Aug 2005 Location: England Posts: 1,499 Rep Power: 5	Whilst I'm not that familiar with C#, I suspect your mistake is thinking that this line: (Toggle Plain Text) AccountData[] TransArray = new AccountData[2]; AccountData[] TransArray = new AccountData[2]; Will make an array of two AccountData objects. I'm fairly sure it won't. It'll make an array capable of holding two AccountData objects, but you'll have to create them yourself: (Toggle Plain Text) TransArray[0] = new AccountData(); TransArray[1] = new AccountData(); TransArray[0] = new AccountData(); TransArray[1] = new AccountData();

Feb 15th, 2006, 6:22 PM	#3
absentmindedjwc Newbie Join Date: Feb 2006 Location: Near Chicago Posts: 5 Rep Power: 0	ok, that worked.... but now I found another problem when I went to run it... a wonderful infinite loop, I will mark what the console is saying with a '' before and after NOTE: it is located near the bottom at the Console.WriteLine (Toggle Plain Text) using System; public class ATM { public static void Main() { int x = 0; AccountData[] TransArray = new AccountData[2]; TransArray[0] = new AccountData(); TransArray[1] = new AccountData(); TransArray[0].SetAcctNum(123); TransArray[0].SetPinsNum(90); TransArray[0].SetAvailableBalance(1000); TransArray[1].SetAcctNum(234); TransArray[1].SetPinsNum(23); TransArray[1].SetAvailableBalance(900); string pinString, accountString; double pin, account; Console.Write("Please enter your account number: "); accountString = Console.ReadLine(); account = Convert.ToDouble(accountString); Console.Write("Please enter your pin number: "); pinString = Console.ReadLine(); pin = Convert.ToDouble(pinString); Console.WriteLine("----------------------------------------------------------"); Console.WriteLine(); for(x = 0; x < TransArray.Length; ++x) { if (TransArray[x].GetAcctNum() == account && TransArray[x].GetPinsNum() == pin) { Console.Write("Do you want to make a transaction? Y or N..."); } else Console.WriteLine("Invalid account and pin please try again or cancel"); } char response; response = GetChar(); while( response == 'Y' \|\| response == 'y') { Console.WriteLine("Please select a transaction. Balance, Withdrawal, or Deposit");* switch (response) { case 'A': case 'a': BalanceMethod(TransArray[x].GetAvailableBalance()); break; case 'B': case 'b': WithdrawalMethod(TransArray[x].GetAvailableBalance()); break; case 'C': case 'c': DepositMethod(TransArray[x].GetAvailableBalance()); break; case 'D': case 'd': CancelMethod(); break; default: Console.WriteLine("Invaild Selection"); break; } } } using System; public class ATM { public static void Main() { int x = 0; AccountData[] TransArray = new AccountData[2]; TransArray[0] = new AccountData(); TransArray[1] = new AccountData(); TransArray[0].SetAcctNum(123); TransArray[0].SetPinsNum(90); TransArray[0].SetAvailableBalance(1000); TransArray[1].SetAcctNum(234); TransArray[1].SetPinsNum(23); TransArray[1].SetAvailableBalance(900); string pinString, accountString; double pin, account; Console.Write("Please enter your account number: "); accountString = Console.ReadLine(); account = Convert.ToDouble(accountString); Console.Write("Please enter your pin number: "); pinString = Console.ReadLine(); pin = Convert.ToDouble(pinString); Console.WriteLine("----------------------------------------------------------"); Console.WriteLine(); for(x = 0; x < TransArray.Length; ++x) { if (TransArray[x].GetAcctNum() == account && TransArray[x].GetPinsNum() == pin) { Console.Write("Do you want to make a transaction? Y or N..."); } else Console.WriteLine("Invalid account and pin please try again or cancel"); } char response; response = GetChar(); while( response == 'Y' \|\| response == 'y') { Console.WriteLine(*"Please select a transaction. Balance, Withdrawal, or Deposit");* switch (response) { case 'A': case 'a': BalanceMethod(TransArray[x].GetAvailableBalance()); break; case 'B': case 'b': WithdrawalMethod(TransArray[x].GetAvailableBalance()); break; case 'C': case 'c': DepositMethod(TransArray[x].GetAvailableBalance()); break; case 'D': case 'd': CancelMethod(); break; default: Console.WriteLine("Invaild Selection"); break; } } }

Feb 15th, 2006, 6:41 PM	#4
Dameon Troll Join Date: Apr 2005 Location: Texas Posts: 732 Rep Power: 4	You get a single character before the beginning of the loop. If it is capital or lowercase y, it loops forever, printing "Please select a transaction" and skipping past a switch. Last I checked, capital or lowercase y does not match capital/lowercase A, B, C, or D. Perhaps you should repeat the prompt about making a transaction as well as fetch a new character each iteration. The order in which to do those two tasks and where is an excercise left to the OP. __________________ MD5(sig) = bcef75433db02e9ad9bf81d6f7c5c270

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Feb 17th, 2006, 12:50 PM	#5
absentmindedjwc Newbie Join Date: Feb 2006 Location: Near Chicago Posts: 5 Rep Power: 0	ok, I fixed the inf loop, but now I have come across a logic error..... somewhere in here, lol I think I said I am trying to make a ATM program, where a user punches in his number and pin (works), and then makes a decision wheather to Withdraw from his account, deposit, or get a balance.... there is the problem... it is saying that the balance is zero, but in the array at the top, it is stated that it is 900 (or 1000, i forgot, lol) if you have any ideas, please let me know, here is the code: (Toggle Plain Text) using System; public class ATM { public static void Main() { int x = 0; AccountData[] TransArray = new AccountData[2]; TransArray[0] = new AccountData(); TransArray[1] = new AccountData(); TransArray[0].SetAcctNum(123); TransArray[0].SetPinsNum(90); TransArray[0].SetAvailableBalance(1000); TransArray[1].SetAcctNum(234); TransArray[1].SetPinsNum(23); TransArray[1].SetAvailableBalance(900); string pinString, accountString; double pin, account; Console.Write("Please enter your account number: "); accountString = Console.ReadLine(); account = Convert.ToDouble(accountString); Console.Write("Please enter your pin number: "); pinString = Console.ReadLine(); pin = Convert.ToDouble(pinString); Console.WriteLine("----------------------------------------------------------"); Console.WriteLine(); for(x = 0; x < TransArray.Length - 1; ++x) { if (TransArray[x].GetAcctNum() == account && TransArray[x].GetPinsNum() == pin) { Console.Write("Do you want to make a transaction? Y or N..."); } else Console.WriteLine("Invalid account and pin please try again or cancel"); } char response; response = GetChar(); while( response == 'Y' \|\| response == 'y') { Console.WriteLine("Please select a transaction. Balance (a) or Withdrawal (b) or Deposit (c)"); response = GetChar(); switch (response) { case 'A': case 'a': BalanceMethod(TransArray[x].GetAvailableBalance()); break; case 'B': case 'b': WithdrawalMethod(TransArray[x].GetAvailableBalance()); break; case 'C': case 'c': DepositMethod(TransArray[x].GetAvailableBalance()); break; case 'D': case 'd': CancelMethod(); break; default: Console.WriteLine("Invaild Selection"); break; } } } public static char GetChar() { char answer; answer = Convert.ToChar(Console.ReadLine()); return answer; } public static void BalanceMethod(double bal) { Console.WriteLine("Your balance is {0}", bal); //return BalanceMethod(double); } public static void WithdrawalMethod(double bal1) { double withdrawalAmount; double amountWithDrawal; Console.WriteLine("Please enter the amount you would like to withdraw?"); withdrawalAmount = Convert.ToDouble(Console.ReadLine()); amountWithDrawal = bal1 - withdrawalAmount; Console.WriteLine("Your balance after your withdrawal is {0}", amountWithDrawal); //return WithdrawalMethod(double); } public static void DepositMethod(double bal2) { double depositAmount, depositTotal; Console.WriteLine("Please enter the amount you would like to deposit."); depositAmount = Convert.ToDouble(Console.ReadLine()); depositTotal = depositAmount + bal2; Console.WriteLine("Your balance after the deposit is {0}", depositAmount); //return DepositMethod(double); } public static double CancelMethod() { Console.WriteLine("Thank you and come again"); return CancelMethod(); } } class AccountData { private double pinNum, acctNum, AvailableBalance = 0; public double GetPinsNum() { return pinNum; } public void SetPinsNum(double pin) { pinNum = pin; } public double GetAcctNum() { return acctNum; } public void SetAcctNum(double account) { acctNum = account; } public double GetAvailableBalance() { return AvailableBalance; } public void SetAvailableBalance(double AvailableBalance) { AvailableBalance = AvailableBalance; } } using System; public class ATM { public static void Main() { int x = 0; AccountData[] TransArray = new AccountData[2]; TransArray[0] = new AccountData(); TransArray[1] = new AccountData(); TransArray[0].SetAcctNum(123); TransArray[0].SetPinsNum(90); TransArray[0].SetAvailableBalance(1000); TransArray[1].SetAcctNum(234); TransArray[1].SetPinsNum(23); TransArray[1].SetAvailableBalance(900); string pinString, accountString; double pin, account; Console.Write("Please enter your account number: "); accountString = Console.ReadLine(); account = Convert.ToDouble(accountString); Console.Write("Please enter your pin number: "); pinString = Console.ReadLine(); pin = Convert.ToDouble(pinString); Console.WriteLine("----------------------------------------------------------"); Console.WriteLine(); for(x = 0; x < TransArray.Length - 1; ++x) { if (TransArray[x].GetAcctNum() == account && TransArray[x].GetPinsNum() == pin) { Console.Write("Do you want to make a transaction? Y or N..."); } else Console.WriteLine("Invalid account and pin please try again or cancel"); } char response; response = GetChar(); while( response == 'Y' \|\| response == 'y') { Console.WriteLine("Please select a transaction. Balance (a) or Withdrawal (b) or Deposit (c)"); response = GetChar(); switch (response) { case 'A': case 'a': BalanceMethod(TransArray[x].GetAvailableBalance()); break; case 'B': case 'b': WithdrawalMethod(TransArray[x].GetAvailableBalance()); break; case 'C': case 'c': DepositMethod(TransArray[x].GetAvailableBalance()); break; case 'D': case 'd': CancelMethod(); break; default: Console.WriteLine("Invaild Selection"); break; } } } public static char GetChar() { char answer; answer = Convert.ToChar(Console.ReadLine()); return answer; } public static void BalanceMethod(double bal) { Console.WriteLine("Your balance is {0}", bal); //return BalanceMethod(double); } public static void WithdrawalMethod(double bal1) { double withdrawalAmount; double amountWithDrawal; Console.WriteLine("Please enter the amount you would like to withdraw?"); withdrawalAmount = Convert.ToDouble(Console.ReadLine()); amountWithDrawal = bal1 - withdrawalAmount; Console.WriteLine("Your balance after your withdrawal is {0}", amountWithDrawal); //return WithdrawalMethod(double); } public static void DepositMethod(double bal2) { double depositAmount, depositTotal; Console.WriteLine("Please enter the amount you would like to deposit."); depositAmount = Convert.ToDouble(Console.ReadLine()); depositTotal = depositAmount + bal2; Console.WriteLine("Your balance after the deposit is {0}", depositAmount); //return DepositMethod(double); } public static double CancelMethod() { Console.WriteLine("Thank you and come again"); return CancelMethod(); } } class AccountData { private double pinNum, acctNum, AvailableBalance = 0; public double GetPinsNum() { return pinNum; } public void SetPinsNum(double pin) { pinNum = pin; } public double GetAcctNum() { return acctNum; } public void SetAcctNum(double account) { acctNum = account; } public double GetAvailableBalance() { return AvailableBalance; } public void SetAvailableBalance(double AvailableBalance) { AvailableBalance = AvailableBalance; } }

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Problem with code - system null ref error