//Copyright (c) 2002, Art Gittleman
//This example is provided WITHOUT ANY WARRANTY 
//either expressed or implied.

using System;

namespace BankAccountAndTest
{
	/* Declares a BankAccount class with an account balance 
	* attribute, two constructors,and GetBalance, Deposit, and 
	* Withdraw operations. 
	*/
	public class BankAccount 
	{
		private double balance;                                                                 

		// Creates a Bank Account with a balance of 0
		public BankAccount()   
		{                                                                    
			balance = 0;
		}

		// Creates a Bank Account with a balance of initialAmount
		public BankAccount(double initialAmount) 
		{
			balance = initialAmount;
		}

		// Increases balance by amount
		public void Deposit(double amount) 
		{
			balance += amount;
		}

		// Reduces balance by amount, if possible
		public double Withdraw(double amount) 
		{
			if (balance >= amount) 
			{
				balance -= amount;
				return balance;
			}
			else
				return -1.0;
		} 

		/* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
		 * 
		 * Add your overloading method Withdraw here 
		 * 
		 */
		public double Withdraw()
		{
			if (balance >= 40.0) 
			{
				balance -= 40.0;
				return balance;
			}
			else
				return -1.0;
		}

		// Returns the balance
		public double GetBalance() 
		{
			return balance;
		}
	}

	/* Creates and tests some BankAccount objects.
	*/
	public class TestBankAccount 
	{
		public static void Main () 
		{                                    
			BankAccount myAccount = new BankAccount(25.00);              
			Console.WriteLine
				("My balance = {0:C}", myAccount.GetBalance());
			myAccount.Deposit(700.00);
			Console.WriteLine("My balance = {0:C}", myAccount.GetBalance());
			if(myAccount.Withdraw(300.00) < 0)
				Console.WriteLine("Insufficient funds");
			Console.WriteLine
				("My balance = {0:C}", myAccount.GetBalance());
			if(myAccount.Withdraw(450.00) < 0)
				Console.WriteLine("Insufficient funds");
			Console.WriteLine("My balance = {0:C}", myAccount.GetBalance());
			BankAccount  yourAccount = new BankAccount();
			yourAccount.Deposit(1234.56);
			Console.WriteLine("Your balance = {0:C}", yourAccount.GetBalance());

			/* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
			* 
			* Add your code here to test the overloading method Withdraw in class BankAccount
			* 
			*/
			Console.WriteLine("\nTesting overloaded Withdraw method...");
			if( yourAccount.Withdraw() >=0 )
				Console.WriteLine("Your balance = {0:C}", yourAccount.GetBalance());
			else
				Console.WriteLine("Insufficient funds");

		}
	}
}