C# --Savings Account Console Program

savings_account.cs

// SavingsAccount 
using System;
namespace SimpleSavingsAccount
{
	// BankAccount – bank account which creates an account ID( which is assigned upon creation)
	// and a balance
public class BankAccount	// the base class
{
// bank accounts start at 1000 and increase sequentially from there 
public static int nNextAccountNumber = 1000;

// maintain the account number and balance for  each object
public  int  nAccountNumber;
public decimal mBalance;

// Init – initialize a bank account with the next account ID and the specified initial balance
// default to zero
public void InitBankAccount()
{
	InitBankAccount(0);
}
public void InitBankAccount (decimal  mInitialBalance)
{
	nAccountNumber = ++nNextAccountNumber;
	mBalance = mInitialBalance;
}

// Balance Property
public decimal Balance
{
	get {return mBalance;}
}

// Deposit – any positive deposit is allowed 
public void Depsosit (decimal mAmount)
{
	if (mAmount >0)
{
	mBalance += mAmount;
}}







// Withdraw – you can withdraw any amount up to the balance; return the amount withdrawn
public decimal Withdraw(decimal mWithdrawal)
{
	if (Balance <= mWithdrawal) // use Balance property
{
	mWithdrawal = Balance;
}
mBalance -= mWithdrawal;
return mWithdrawal;
}
// ToString – stringify the account
public string ToBankAccountString()
{
	return String.Format(“(0) – (1:C)”,
	nAccountNumber, Balance);
}}

// SavingsAccount – a bank account that draws interest
public class SavingsAccount : BankAccount  // the subclass
{
	public decimal mInterestRate;
	// InitSavingsAccount – input the rate expressed as a rate between 0 and 100
	public void InitSavingsAccount(decimal mInterestRate)
{
	InitSavingsAccount(0, mInterestRate);
}
public void InitSavingsAccount (decimal  mInitial, decimal mInterestRate)
{
	InitBankAccount (mInitial);
	this.mInterestRate = mInterestRate/ 100;
}

// Accumulate Interest – invoke once per period
public void AccumulateInterest()
{
	mBalance = Balance + (decimal) (Balance * mInterestRate);
}

// ToString – stringify the account
public string  ToSavingsAccountString()
{
	return String.Format(“{0}  ({1}%),
	ToBankAccountString(), mInterestRate *100);
}}




public class Program
{
	public static void Main(string[] args)
	{
		// create a bank account and display it
		BankAccount  ba = new BankAccount();
		ba.InitBankAccount(100);
		ba.Deposit(100);
		Console.WriteLine(“Account {0}”, ba.ToBankAccountString());
		// now a savings account
		SavingsAccount  sa = new SavingsAccount();
		sa.InitSavingsAccount(100, 12.5m);
		sa.AccumulateInterest();
		Console.WriteLine(“Account {0}”, sa.ToSavingsAccountString());
		// wait for user to acknowledge the results
		Console.WriteLine(“Press Enter to terminate…);
		Console.Read();
}}}

Output:
Account 1001 - $200.00
Account 1002 - $112.50 (12.500%)
Press Enter to terminate…

public class Program
{
	// Direct Deposit – deposit paycheck directly
	//Direct deposit inherits BankAccounts
	public static void Direct Deposit (BankAccount  ba,  decimal mPay	{
		ba.Deposit (mPay);
	}
	public static void Main(string[]  args)
	{
		// create a bank account and display it
		BankAccount ba = new BankAccount();
		ba.InitBankAccount(100);
		DirectDeposit (ba, 100);
		Console.WriteLine(“Account (0)”, ba.ToBankAccountString());
		// now a savings account
		SavingsAccount  sa = new SavingsAccount();
		sa.InitSavingsAccount(12.5m);
		DirectDeposit(sa, 100);
		sa.AccumlateInterest();
		Console.WriteLine(“Account (0)”, sa.ToSavingsAccountString());
		// wait for user to acknowledge the results
		Console.WriteLine(“Press Enter to terminate…”);
		Console.Read();
	}}