Untitled

            double m1, m2, m3, total, per;

            Console.Write("Enter marks of Subject 1: ");
            m1 = Convert.ToDouble(Console.ReadLine());

            Console.Write("Enter marks of Subject 2: ");
            m2 = Convert.ToDouble(Console.ReadLine());

            Console.Write("Enter marks of Subject 3: ");
            m3 = Convert.ToDouble(Console.ReadLine());

            total = m1 + m2 + m3;
            per = total / 3;

            Console.WriteLine("Total = " + total);
            Console.WriteLine("Percentage = " + per);

            if (per >= 60)
                Console.WriteLine("Grade = A");
            else if (per >= 50)
                Console.WriteLine("Grade = B");
            else if (per >= 40)
                Console.WriteLine("Grade = C");
            else
                Console.WriteLine("Grade = F");

            Console.ReadLine();

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        string[] name = new string[5];
        int[] qty = new int[5];
        double[] rate = new double[5];
        double[] net = new double[5];

        double max = 0;
        string maxItem = "";

        for (int i = 0; i < 5; i++)
        {
            Console.WriteLine("\nEnter details for Item " + (i + 1));

            Console.Write("Name: ");
            name[i] = Console.ReadLine();

            Console.Write("Quantity: ");
            qty[i] = Convert.ToInt32(Console.ReadLine());

            Console.Write("Rate: ");
            rate[i] = Convert.ToDouble(Console.ReadLine());

            net[i] = qty[i] * rate[i];

            if (net[i] > max)
            {
                max = net[i];
                maxItem = name[i];
            }
        }

        Console.WriteLine("\nItem Details:");
        for (int i = 0; i < 5; i++)
        {
            Console.WriteLine(name[i] + " - Net Amount: " + net[i]);
        }

        Console.WriteLine("\nItem with Highest Net Amount: " + maxItem + " = " + max);

        Console.ReadLine();

   
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	int num;

        Console.Write("Enter Number: ");
        num = Convert.ToInt32(Console.ReadLine());

        if (num >= 0)
            Console.WriteLine("Positive Number");
        else
            Console.WriteLine("Negative Number");

        Console.ReadLine();

	int num;

        Console.Write("Enter Number: ");
        num = Convert.ToInt32(Console.ReadLine());

        if (n % 2 == 0)
            Console.WriteLine("Even Number");
        else
            Console.WriteLine("Odd Number");

        Console.ReadLine();


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        int num, rev = 0, temp;

        Console.Write("Enter Number: ");
        num = Convert.ToInt32(Console.ReadLine());

        temp = num;

        while (num > 0)
        {
            rev = rev * 10 + num % 10;
            num = num / 10;
        }

        if (temp == rev)
            Console.WriteLine("Palindrome Number");
        else
            Console.WriteLine("Not Palindrome");

        Console.ReadLine();


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        int num, sum = 0, temp, rem;

        Console.Write("Enter Number: ");
        num = Convert.ToInt32(Console.ReadLine());

        temp = num;

        while (num > 0)
        {
            rem = num % 10;
            sum = sum + (rem * rem * rem);
            num = num / 10;
        }

        if (temp == sum)
            Console.WriteLine("Armstrong Number");
        else
            Console.WriteLine("Not Armstrong");

        Console.ReadLine();
  
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        int num, i;
        bool isPrime = true;

        Console.Write("Enter Number: ");
        num = Convert.ToInt32(Console.ReadLine());

        if (num <= 1)
            isPrime = false;
        else
        {
            for (i = 2; i <= num / 2; i++)
            {
                if (num % i == 0)
                {
                    isPrime = false;
                    break;
                }
            }
        }

        if (isPrime)
            Console.WriteLine("Prime Number");
        else
            Console.WriteLine("Not Prime Number");

        Console.ReadLine();
   
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        int num, a = 0, b = 1, c;
        bool found = false;

        Console.Write("Enter Number: ");
        num = Convert.ToInt32(Console.ReadLine());

        while (a <= num)
        {
            if (a == num)
            {
                found = true;
                break;
            }

            c = a + b;
            a = b;
            b = c;
        }

        if (found)
            Console.WriteLine("Member of Fibonacci Series");
        else
            Console.WriteLine("Not Member of Fibonacci");

        Console.ReadLine();
  

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml.Linq;

using System;

// Base Class
class Product
{
    protected string productName;
    protected double productPrice;

    public void SetProduct(string name, double price)
    {
        productName = name;
        productPrice = price;
    }

    public void DisplayProduct()
    {
        Console.WriteLine("Product Name: " + productName);
        Console.WriteLine("Product Price: " + productPrice);
    }
}

// Derived Class - Medicine
class Medicine : Product
{
    private string expireDate;
    private string diseaseName;

    public void SetMedicine(string name, double price, string expDate, string disease)
    {
        SetProduct(name, price);
        expireDate = expDate;
        diseaseName = disease;
    }

    public void DisplayMedicine()
    {
        DisplayProduct();
        Console.WriteLine("Expire Date: " + expireDate);
        Console.WriteLine("Disease Name: " + diseaseName);
        Console.WriteLine("---------------------------");
    }
}

// Derived Class - Sports Item
class SportsItem : Product
{
    private string sportsName;
    private string madeMaterial;

    public void SetSportsItem(string name, double price, string sport, string material)
    {
        SetProduct(name, price);
        sportsName = sport;
        madeMaterial = material;
    }

    public void DisplaySportsItem()
    {
        DisplayProduct();
        Console.WriteLine("Sports Name: " + sportsName);
        Console.WriteLine("Made Material: " + madeMaterial);
        Console.WriteLine("---------------------------");
    }
}

// Main Class
class Program
{
    static void Main(string[] args)
    {
        Medicine med = new Medicine();
        SportsItem sport = new SportsItem();

        med.SetMedicine("Paracetamol", 50, "12/2026", "Fever");
        sport.SetSportsItem("Cricket Bat", 1500, "Cricket", "Wood");

        Console.WriteLine("Medicine Details:");
        med.DisplayMedicine();

        Console.WriteLine("Sports Item Details:");
        sport.DisplaySportsItem();

        Console.ReadLine();
    }
}