using System;

public class Program

{

    public static void dec_to_bi(int n,int[] a)

    {

            int i;

            for(i=0;n>0;i++)

            {

                a[i]=n%2;

                n=n/2;

            }

        Console.WriteLine("binary of given number is");

        for(i=i-1;i>=0;i--)

        {

            Console.WriteLine(a[i]);

        }

    }

    public int bi_to_dec(string binaryString)

    {

    int decimalValue = 0;

        int power = 0;

​

        for (int i = binaryString.Length - 1; i >= 0; i--)

        {

            int digit = binaryString[i] - '0'; // Convert char to int

            decimalValue += digit * (int)Math.Pow(2, power);

            power++;

        }

​

        return decimalValue;

    }

    public static void Main()

    {

        Console.WriteLine("1: to calculate hypotenuse  2:to calculate area of circle");

        Console.WriteLine("Enter your choice");

        int ch;

        ch=int.Parse(Console.ReadLine());

        switch(ch)

        {

            case 1:int n;

                 int[] a=new int[10];

                 Console.WriteLine("enter the number to convert");

                 n=int.Parse(Console.ReadLine());

                 dec_to_bi(n,a);

                break;

            case 2:string binaryNumber = "110110";

            int decimalValue = BinaryToDecimalConverter.bi_to_dec(binaryNumber);

            Console.WriteLine($"Binary: {binaryNumber}, Decimal: {decimalValue}");

                break;

            default: Console.WriteLine("invalid");

                break;

        }

    }

}