Question

Needs to be written in C# Console App! Create a base class BankAccount. Decide what characteristics are common for checking and saving accounts and include these characteristics in the base class. Define derived classes for checking and savings. In your design , do not allow the banking base account to be instantiated --only the checking and saving classes. Use a Program class to test your design.

Answer 1

using System;

class BankAccount //base class
{
   protected int accountNumber; //protected data members can be used in derived classes
   protected double balance;
   public void deposit(double amount) //define deposit method
    {
        balance = balance + amount;
    }
  
}
class SavingAccount: BankAccount   //derived class
{
    public SavingAccount(int accountNumber,double balance) //constructor
    {
        this.accountNumber = accountNumber;
        this.balance = balance;
    }
    public void withdraw(double amount) //withdraw method
    {
        if(balance < amount)
        Console.WriteLine("Cannot be done");
        else
        balance = balance - amount;
    }
    public override string ToString()
    {
        return "Saving Account : Account number = "+accountNumber+"Balance = "+balance;
    }
  
}
class CheckingAccount : BankAccount //derived class
{
    private double overdraftLimit;
    public CheckingAccount(int accountNumber,double balance,double overdraftLimit) //constructor
    {
        this.accountNumber = accountNumber;
        this.balance = balance;
        this.overdraftLimit = overdraftLimit;
    }
  
    public void withdraw(double amount) //withdraw method checks overdraft limit also
    {
        if(balance + overdraftLimit < amount)
        Console.WriteLine("Cannot be done");
        else
        balance = balance - amount;
    }
    public override string ToString()
    {
        return "Checking Account : Account number = "+accountNumber+" Balance = "+balance;
    }
}

public class AccountTest
{
   public static void Main()
   {
       SavingAccount sa = new SavingAccount(1456,677.50);
       sa.deposit(200);
       Console.WriteLine(sa.ToString());
      
       CheckingAccount ca = new CheckingAccount(1004,677.50,200);
       sa.withdraw(1000);
       Console.WriteLine(ca.ToString());
      
   }
}

Output:

Saving Account : Account number = 1456Balance = 877.5                                                                                                  

Cannot be done                                                                                                                                         

Checking Account : Account number = 1004 Balance = 677.5