using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("By Brandon Eduardo Cortes Correa");

        Console.WriteLine("");

               int n1, n,p=1;

        int dec=0,i=1,j,d;

        int ocno=0;

    Console.Write("\n\n");

    Console.Write("Convert binary number into octal:\n");

    Console.Write("-----------------------------------");

    Console.Write("\n\n");      

​

    Console.Write("Input a binary number :");

    n = Convert.ToInt32(Console.ReadLine());    

    n1=n;

    for (j=n;j>0;j=j/10)

    {  

          d = j % 10;

            if(i==1)

                  p=p*1;

            else

                 p=p*2;

​

       dec=dec+(d*p);

       i++;

    }

/*--------------------------------------------*/

     i=1;

​

      for(j=dec;j>0;j=j/8)

       {

        ocno=ocno+(j % 8)*i;

        i=i*10;

        n=n/8;

       }

        Console.Write("\nThe Binary Number : {0}\nThe equivalent Octal  Number : {1} \n\n",n1,ocno);

}

}