All c# program

1.তিনটা সংখ্যার ভিতর বড় সংখ্যা নির্নয় এর c# প্রোগ্রাম লিখ।
using System;
using System.Collections.Generic;
using System.Text;

namespace Program
{
    class Big_number
    {
        static void Main(String[] args)
        {
            int num1, num2, num3;

            Console.Write("Enter your first numebr: ");
            num1 =Convert.ToInt32( Console.ReadLine());

            Console.Write("Enter your first numebr: ");
            num2 = Convert.ToInt32(Console.ReadLine());

            Console.Write("Enter your first numebr: ");
            num3 = Convert.ToInt32(Console.ReadLine());

            if (num1 > num2 && num1 > num3)
            {
                Console.WriteLine("The large number is =" + num1);
            }
            else if (num2 > num1 && num2 > num3)
            {
                Console.WriteLine("The large number is =" + num2);
            }
            else
            {
                Console.WriteLine("The large number is =" + num3);
            }
            Console.ReadKey();
        }
    }
}

2.দ্বিঘাত সমীকরণের মূল বের করার জন্য  c# প্রোগ্রাম লিখ।
using System;
using System.Collections.Generic;
using System.Text;

namespace Program
{
    class dighat_somikoron
    {
        static void Main(string[] args)
        {
            int a, b, c;

            double d, x1, x2;

            Console.Write("Input the value of a : ");
            a = Convert.ToInt32(Console.ReadLine());

            Console.Write("Input the value of b : ");
            b = Convert.ToInt32(Console.ReadLine());

            Console.Write("Input the value of c : ");
            c = Convert.ToInt32(Console.ReadLine());

            d = b * b - 4 * a * c;
            if (d == 0)
            {
                Console.Write("Both roots are equal.\n");
                x1 = -b / (2.0 * a);
                x2 = x1;
                Console.Write("First  Root Root1= {0}\n", x1);
                Console.Write("Second Root Root2= {0}\n", x2);
            }
            else if (d > 0)
            {
                Console.Write("Both roots are real and diff-2\n");

                x1 = (-b + Math.Sqrt(d)) / (2 * a);
                x2 = (-b - Math.Sqrt(d)) / (2 * a);

                Console.Write("First  Root Root1= {0}\n", x1);
                Console.Write("Second Root root2= {0}\n", x2);
            }
            else
                Console.Write("Root are imeainary;\nNo Solution. \n\n");
        }
    }
}
৩. মাল্টিলেভেল ইনহেরিটেন্স ব্যবহার করে  c# প্রোগ্রাম লিখ।
using System;
using System.Collections.Generic;
using System.Text;

namespace Program
{
    class A
    {
        public void show()
        {
            Console.WriteLine("Welcome to the world of c#");
        }
    }
    class B : A //class B is derived by class A
    {
        public void display()
        {
            Console.WriteLine("Hello");
        }
    }
    class C : B //class C is derived by class B
    {
        public void show1()
        {
            Console.WriteLine("How are You ?");
        }


        class Multilevel_inheritench
        {

            public static void Main()
            {
                C obj = new C();
                obj.show();
                obj.display();
                obj.show1();
            }
        }
    }
}


৪. ১ থেকে ১০০ পর্যন্ত প্রাই নাম্বার বের করার   c# প্রোগ্রাম লিখ।
using System;
using System.Collections.Generic;
using System.Text;

namespace Program
{
    class Prime_Number
    {
        static void Main(String[] args)
        {
            int count = 0,n;
            Console.WriteLine("Prime numbers between 1 and 100 are: ");

            for (int i = 1; i < 101; i++)
            {
                count = 0;
                if (i > 1)
                {
                    for (int j = 2; j < i; j++)
                    {
                        if (i % j == 0)
                        {
                            count = 1;
                            break;
                        }
                    }
                    if (count == 0)
                    {
                        Console.Write(i + "  ");
                    }
                }
            }
        }
    }
}

৫।  array ব্যবহার করে ১০ টি সংখার মাঝে বড় সংখ্যা মাঝে বড় সংখ্যাটি বের করার প্রোগ্রাম।
using System;
using System.Collections.Generic;
using System.Text;

namespace Program
{
    class Array
    {
        static void Main(String[] args)
        {
            int i = 0;
            int large = 0;

            int[] arr = new int[10];


            Console.WriteLine("Enter array elements : ");
            for (i = 0; i < arr.Length; i++)
            {
                Console.Write("Element[" + (i + 1) + "]: ");
                arr[i] = int.Parse(Console.ReadLine());
            }


            large = arr[0];
            for (i = 1; i < arr.Length; i++)
            {

                if (large < arr[i])
                    large = arr[i];
            }

            Console.WriteLine("Largest element in array : " + large);
        }
    }
}
৬। ইন্টারফেস ব্যবহার করে একটা প্রোগ্রাম ।
Live Demo
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System;

namespace InterfaceApplication {

   public interface ITransactions {
      // interface members
      void showTransaction();
      double getAmount();
   }
   public class Transaction : ITransactions {
      private string tCode;
      private string date;
      private double amount;

      public Transaction() {
         tCode = " ";
         date = " ";
         amount = 0.0;
      }
      public Transaction(string c, string d, double a) {
         tCode = c;
         date = d;
         amount = a;
      }
      public double getAmount() {
         return amount;
      }
 public void showTransaction() {
         Console.WriteLine("Transaction: {0}", tCode);
         Console.WriteLine("Date: {0}", date);
         Console.WriteLine("Amount: {0}", getAmount());
      }
   }
   class Tester {

      static void Main(string[] args) {
         Transaction t1 = new Transaction("001", "8/10/2012", 78900.00);
         Transaction t2 = new Transaction("002", "9/10/2012", 451900.00);

         t1.showTransaction();
         t2.showTransaction();
         Console.ReadKey();
      }
   }
}



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