Question

Using C#: Create an application class named BillDemo that instantiates objects of two classes named Bill and OverdueBill, and that demonstrates all their methods. The Bill class includes auto-implemented properties for the name of the company or person to whom the bill is owed and for the amount due. Also, include a ToString() method and returns a string that contains the name of the class (using GetType()) and the Bill’s data fields values. Create a child class named OverdueBill that includes an auto-implemented property that holds the number of days the bill is overdue.

Answer 1

Dear Student ,

As per the requirement submitted above , kindly find the below solution.

Here a new Console Application in C# is created using Visual Studio 2017 with name "BillDemoApplication".This application contains below class.

BillDemo.cs :

//namespace
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
//application namespace
namespace BillDemoApplication
{
class BillDemo //C# class
{
//entry point of application Main method
static void Main(string[] args)
{
//creating object of Bill class
Bill bill = new Bill();
//creating object of OverdueBill class
OverdueBill overdueBill = new OverdueBill();
//asking user to enter name
Console.Write("Enter Name : ");
bill.name = Console.ReadLine();//reading name
//asking user to enter amount due
Console.Write("Enter amount due : ");
bill.amountDue = double.Parse(Console.ReadLine());//reading name
//asking user to enter number of days bill is overdue
Console.Write("Enter number of days bill is overdue : ");
overdueBill.numberOfDays = int.Parse(Console.ReadLine());//reading number of days
//print details
Console.WriteLine(bill.ToString()+Environment.NewLine+overdueBill.ToString());
//to hold the screen
Console.ReadKey();
}
}
//class Bill
class Bill
{
//auto-implemented properties
public string name { get; set; }
public double amountDue { get; set; }
//ToString() method
public override string ToString()
{
//return name of the class with name and amount due
return "Class Name : " + GetType() + "\nName : " + name + "\nAmount Due : " + amountDue;
}
}
//class OverdueBill
class OverdueBill : Bill
{
//auto-implemented properties
public int numberOfDays { get; set; }
//ToString() method
public override string ToString()
{
//return Number of Days bill overdue
return "Number of Days bill overdue : " + numberOfDays;
}
}
}

======================================================

Output : Run application using F5 and will get the screen as shown below

Screen 1 :BillDemo.cs

NOTE : PLEASE FEEL FREE TO PROVIDE FEEDBACK ABOUT THE SOLUTION.